op zoo 2 Flashcards
1.How many bones found in human skeletal or body? (A) 212 (B) 206 (C) 202 (D) 200
(B) [SSC MTS, 2011, 1999, 2002] Exp: The Human Skeletal system is comprised of 206 bones. Each bone is made up of many cells, protein fibres and minerals. Skeletal system support and protect the soft tissues, help in movement of the joint, calcium storage and endocrine regulation.
2.In human body total bones are- (A) 187 (B) 287 (C) 206 (D) 306
(C) [SSC CGL, 2008, 2011] Exp: The Skeletal system in an Human adult body is made up of 206 bones. The bones are arranged into two major divisions as the axial skeleton and appendicular skeleton. The axial skeletal includes skull, hyoid, Auditory ossicles, Ribs, Sternum and vertebral column and is made up of 80 bones. The appendicular skeleton is made up of 126 bone.
3.How many bones are found in adult human? (A) 210 (B) 260 (C) 206 (D) 300
(C) [SSC MTS Exam, 2011] Exp: See the exaplanation of above Question
4.In human body longest bone is- (A) Human (B) Spinal corad (C) Femur (D) Hip bone
(C) [SSC CGL, CPO Exam, 2011] Exp: The longest bone in Human body is femur and is the only bone of thigh region. Femur forms the ball and socket hip joint with the hip bone and forms the knee joint.
5.In human skeletal Examination is generally done for- (A) Brain Power (B) Internal age (C) Internal height (D) Destensis
(B) [SSC MTS Exam, 2014] Exp: Human skeletal Examination is generally done for calculating Internal age. It can be determined from eruption of teeth, length of long bones, closures of skull sutures, calcification, osteoporosis. Skeletal examination can help in identification of race, sex, age and cause of death etc.
6.How many muscles are found in our body? (A) 565 (B) 656 (C) 665 (D) 556
(B) [SSC CHSL (10+2) -2011] Exp: Muscles are connective tissues derived from mesodermal layer. Muscles contain actin and myosin protein, that helps in contraction and movement. There are approximately 656 Skeletal muscles in the human body. There are three types of muscle tissue skeletal, visceral and cardiac muscle. E. Skeletal System
7.How many no of skeletal muscle found in our body? (A) 206 (B) 200 (C) 500 (D) 700
(D) [SSC (10+2) Exam, 2015] Exp: There are 700 skeletal muscles found in human being. [Note:- Both 656 and 700 option are correct
8.What is the hard animal layer of teeth. (A) Calcium hydro-Oxide (B) Calcium Hydroxyapatite (C) Calcium Oxide (D) Calcium Phosphate
(B) [SSC CHSL (10+2) - 2015] Exp: Teeth animal is made of a kind of hard substance. Which is known as hydroxyl apatite. It is a salt made up from calcium phosphate and hydroxyle.
9.Which part of elephant convert in form of elephant teeth? (A) Internal Teeth (B) Posterior Teeth (C) Secondary Teeth (D) Jaw
(C) [SSC CGL Exam, 2011] Exp: Elephants have total 26 teeth.12 deciduous premolars and 12 molars and 2 incisors known as tusk teeth. In elephants upper teeth of Jaw grow life time and secondary teeth convert in form of teeths.
10.The average weight of human brain about- (A) 1.64 kg (B) 1.36 kg (C) 1.46 kg (D) 1.63 kg
(B) [SSC CPO Exam, 2010] Exp: On an average weight of human brain is 1.2 - 1.4 kg and 2% of the total body weight Cerebrum is the largest part of Brain. Brain is the muscular organ made up of neuron, and is protected by skull.
11.Which are contractile protein in any muscle- (A) Actin and Myosin (B) Actin and Tropomyosin (C) Myosin and Troponin (D) Troponin and Tropomyosin
(A) [SSC CHSL (10+2) - 2010] Exp: Muscle cells are made up of contractile protein filaments of actin and myosin. These filaments are parallely arranged in sarcoplasm called myofibrils. Each myofibrils has a dark and light band known as Anisotropic or myosin and Isotropic or Actin.
12.In which following muscular organism do not have Exo-Skeleton- (A) Amphibean (B) Mammalia (C) Aves (D) Chondrichthyes
(A) [SSC CHSL (10+2) Exam, 2010] Exp: Exo-skeleton is a hard covering that supports and protects the body. Shells, bones, chitin, calcium carbonate are some of the exoskeleton found in animals and other organisms. Amphibians do not have exo-skeleton.
13.Which of the following have maximum no of ribs- (A) Crocodile (B) Snake (C) Ray fish (D) Flying Mammals
(B)Exp: Mammals have the maximum number of ribs. There are total 12 pair or 24 ribs are found in mammals. Snakes have around 200-400 veretebrae with same number of ribs attached to them, this makes the snakes flexible.
14.Odontology is branch of sicence, it study relocated to- (A) Bone (B) Effect of time (C) Teeth (D) Personality
(C) [SSC CHSL (10+2) - 2012] Exp: Odontology is the branch of science which deals with the study of structure, development and abnormalities of the teeth.
15.Wisdom molar is- (A) First molar (B) Second molar (C) Third molar (D) Forth molar
(C) [SSC FCI Exam, 2012] Exp: Wisdom tooth is third molar out of the total 3 molars present in human dental. Humans have four types of teeth incisors, canines premolars and molars.
16.Osteocyte found in- (A) Bone (B) Bood (C) Cartelage (D) Lymph
(A) [SSC Steno Exam, 2011] Exp: Osteocytes are the most abundant cells in nature found in bone tissues. Osteocytes derive from Osteblasts, or bone forming cells. These cells are responsible for the synthesis and mineralization of bone formation and bone remodelling.
17.The transverse colon is part of- (A) Large intestine (B) Ilium (C) Small intestine (D) Anus.
(A) [SSC CHSL Exam, 2013] Exp: The human alimentary canal consist of oral cavity ,oesophagus, stomach, small intestine and large intestine. Large intestine accumulates the waste released after digestion. Large intestine is segmented into three parts colon, cacum and rectum. Colon further has three parts according to its arrangement named as ascending colon, transverse colon and descending colon.
18.The Occipital is region which is found in- (A) Ear (B) Lungs (C) Macula (D) Skull
(D) [SSC CGL Exam, 2014] Exp: Skull is the protective covering of brain. The skull is composed of two parts the cranium and the mandible. There are total 8 cranial bones named as occipital, parietal, frontal and temporal.
19.The Wings of birds are- (A) Integumentary Outgrowth (B) Modified Forelimbs (C) Modified Hindlimbs (D) New Structure
(B) [SSC MTS Exam, 2013] Exp: The wings of birds are modified forelimbs. Wings help. the birds to flight by exerting a downward force. This modification of forelimbs is the structural adaptation of birds to suit their aerial life.
20.Osteocytes are found in- (A) Bone (B) Blood (C) Cartilage (D) Lymph
(A) [SSC Stenographer Exam 2011] Exp: Osteocytes are the bone forming cells in all chordates. These are star-shaped cells that form network through cytoplasmic extensions. The space occupied by these cells are known as lacuna.
21.In human body, cartilage is found in- (A) Tongu (B) Nose (C) Chin (D) Nail
(B) [SSC Matric Level -2002] Exp: In human body cartilaginous tissues are found in nose, ear pinna, rib cage etc. Cartiliaginous tissues are dense connective tissues, composed of specialized cells called chondrocytes. Cartilage is classified in three types, elastic cartilage, hyaline cartilage and fibro cartilage.
22.The types of vertebrate animals which creep and crawl are called- (A) Mammalians (B) Amphibians (C) Molluscs (D) Reptilians
(D) [SSC (10+2) Exam 2012] Exp: Reptiles are vertebrate animals which creep and crawl with their hind and fore limb Reptiles are cold blooded, tetrapod animals with horny epidermal scales.
23.Jaws are absent in- (A) Birds (B) Fishes (C) Protochordates (D) Reptiles
(C) [SSC (10+2) Exam 2012] Exp: Protochordata or acraniata are the invertebrates belong to phylum chordata and non vertebrate organisms have a rod-like structure called notochord, which provide skeletal to the body. Have the paired pharyngial gill slits for circulation of water. Post-anal tail is present. The phylum is divided into urochordata and cephalochordata. Eg, Balanoglosssus, Herdmania and Amphioxus.
24.An invertebrate does not have- (A) Notochord (B) Body Cavity (C) Haemocoel (D) Gills
(A) [SSC (10+2) Exam 2012] Exp: An invertebrate does not have the presence of notochord and vertebral column. Notochard is a stiff rod like structure which serves as internal skeleton, during any stage of their life.
25.The tusk of the elephant is an enormously enlarged- (A) Upper Incisor (B) Upper Canine (C) Lower Canine (D) Lower Incisor
(A) [SSC FCI Exam 2012] Exp: The tusk of elephant are incisors of upper jaw. The incisors of rodents grow throughout life and are worn by gnawing. In cats, incisors are small and help in biting.
26.Bones are pneumatic in- (A) Fishes (B) Amphibians (C) Reptiles (D) Birds
(D)Exp: Pneumatic bones are present in birds. Bones are hollow with many air cells. Due to the presence of air spaces bone become lighter, this helps the bird in easy flight.
27.In which of the following group, animals bear no teeth? (A) Peacock, Ostrich, Tortoise (B) Owl, Loris, Crow (C) Alligator, Turtle, Tortoise (D) Turtle, Kiwi, Cow
(A) [SSC SO Exam 2008] Exp: Peacock, Ostrich, Tortoise are the group of animals with no teeth. Peacock and Ostrich belongs to phylum Aves and tortoise belongs to phylum Reptiles. Although reptiles have the teeth but the tortoise is an exception.
28.Which one of the following creature has maximum number of ribs? (A) Crocodile (B) Snake (C) Ray Fish (D) Flying Mammal
(B) [SSC Tax Asst. -2007] Exp: Snakes have around 200-400 vertebral bones with the same number of ribs joining these vertebrae on either side. This structure of skeleton provide the immense flexibility to the snake for movement.
29.Syrinx is the voice box in- (A) Amphibians (B) Reptiles (C) Birds (D) Mammals
(C) [SSC CGL Exam 2011] Exp: Syrinx is the vocal organ of birds. Sound is produced by vibration of all the membrane tympaniform (the walls of the syrinx), syrinx enables some species of birds to mimic human sound.
30.Which of the following vertebrates lack exoskeleton? (A) Amphibia (B) Mammalia (C) Aves (D) Chondrichthyes
(D) [SSC (10+2) Exam 2010] Exp: Cartilaginous fishes or Chondrichthyes appeared on Earth almost 450 millions years ago. They lack true bones and have endoskeleton made up of cartilages. Only their teeth and sometimes their vertebrae are calcified, which are different from true bones.
31.Which of the following has no skeleton at all? (A) Star Fish (B) Sponge (C) Jelly Fish (D) Silver Fish
(D) [SSC CGL Exam 2007] Exp: Silver fish are nocturnal, wingless insects. These insects lacks any additional appendages and has no skeleton at all. They move in a wiggling motion like that of fish. [Note: Scientific Name of silver fish- Lepisma Saccharina]
32.Flat footed camels can walk easily in sandy deserts because- (A) Pressure on the sand is decreased by increasing the area of the surface in contact (B) Pressure on the sand is increased by increasing the area of the surface in contact (C) Pressure on the sand is decreased by decreasing the area of the surface in contact (D) Pressure on the sand is increased by decreasing the area of the surface in contact
(A) [SSC CPO Exam 2007] Exp: Camels feet are wide so they can walk on sand more easily. Flat and wide foot decrease the pressure on sand by increasing the surface area of contact which prevent them sinking into it. So, camel is also called as Plane of desert.
33.Taenia solium (tapeworm) lives as a parasite in- (A) Pig (B) Abdomen of man/woman (C) Intestine of man/woman (D) Liver of man/woman
(C) [SSC SO Exam 2005] Exp: Taenia solium is an endoparasitic worm, belongs to phylum Platyhelminthes. Taenia solium completes its life cycle by passing through pigs as intermediate hosts and residing in intestine of humans, as definitive hosts.
34.Which of the following structure present in mammalian skin directly helps in keeping the body warm? (A) Pigmented Cells (B) Sweat Glands (C) Lymph Vessels (D) Blood Capillaries
(B) [SSC CGL Exam 2005] Exp: Sweat glands help in thermo regulation by reducing the body temperature. Sweat glands also help in maintaining the concentration of electrolytes sodium and chloride. Sweat glands act as exocrine gland and also known as sudoriferous glands.
35.How many feet has a crab got? (A) 12 (B) 10 (C) 8 (D) 6
(C) [SSC CPO Exam 2003] Exp: Crabs belong to category crustaceans of phylum Arthropoda. Crabs can live in oceans, fresh water and on land. The body is covered with thick exoskeleton with four pair or eight legs.
- Wisdom teeth is the- (A) 1st molar teeth (B) 2nd molar teeth (C) 3rd molar teeth (D) 4th molar teeth
(C) Exp: Wisdom teeth are officially known as third molar, which errupted between the age of 17-25 years, when the person gains maturity and wisdom.
36.Which of the following is used for wrapping of fractured bones? (A) White cement (B) White lead (C) Zinc oxide (D) Plaster of Paris
(D) [SSC CISF Exam 2011] Exp: Plaster of Paris is a hard white substance made by the addition of water to powered and partly dehydrated gypsum. It is used for holding broken bones.
37.The number of teeth which are replaced in man are- (A) 12 (B) 20 (C) 32 (D) 16
(B)Exp: Human beings are diphodont with two successive sets of teeth initially the deciduous and later permanent. Deciduous teeth are 20 in numbers and also known as milk teeth or temporary teeth. These 20 deciduous teeth are replaced by permanent teeth.
38.The total number of bones in the human body is- (A) 206 (B) 260 (C) 306 (D) 360
(A) [SSC MTS Exam, 2011) Exp: Human skeleton is made up of about 300-350 bones at the time of birth, but at adulthood, there are 206 bones present in body. This is because some bones get fused together. All bones of human skeleton can be categorised into axial skeleton and appendicular skeleton. The six major function of human skeleton are support movement, protection, production of blood cells, storage of ion and Endocrine regulation.
39.The longest bone in the human body is- (A) Ulna (B) Humerus (C) Femur (D) Tibia
(C) [SSC CGL Exam 2011] Exp: Femur or thigh bone is the longest, heaviest & strongest bone of the human skeleton. It extends from hip to the knee. Main function of femur is to transmit forces from tibia to hip joint.
40.Which are not included in the milk-teeth in a child of 3-4 years? (A) Incisors (B) Canines (C) Molars (D) Premolars
(C) [SSC Matric Level Exam 2006] Exp: Molars are not the part of milk teeth in childrens. Molars are the most posterior and complex type of teeth. Their primary function is to grind food during chewing.
41.What does enamel cover? (A) Crown of the tooth (B) Dentin on all sides (C) Cementum (D) Cementum and partly dentin
(A) [SSC Matric Level Exam 2006] Exp: Tooth enamel is the hardest part of the human body. It covers the crown of the tooth sides. Four major tissues in teeth formation are dentin, cementum, dental pulp and enamel. Tooth enamel protects the tooth from degradation by acids, foods and drinks.
42.The total number of vertebrae in a human being is- (A) 26 (B) 30 (C) 29 (D) 33
(D) [SSC SO Exam 2003] Exp: Vertebral in human skeleton is a part of Axial skeleton. There are total 33 bones present in human vertebrae.
43.In a human body, the longest bone is in the- (A) Vertebral column (B) Thigh (C) Rib cage (D) Arm
(B) [SSC CPO Exam 2003] Exp: The longest and strongest bone of human body is Femur or thigh bone. It can bear the pressure of about 1500-2300 pound. The bone joint hip and knees. This is the only bone in thigh region of human.
44.Which of these joints is a hinge joint? (A) Hip (B) Elbow (C) Shoulder (D) Wrist
(B) [SSC Matric Level Exam 2003] Exp: Hinge joints are a class of synovial joint that includes ankle, elbow and knee joints. Hinge joints are formed between two or more bones where the bones can only move along one axis to other extended axis.
45.Wh ich of the fol low ing is the hardest substance in the human body? (A) Bone (B) Enamel (C) Dentine (D) Nail
(B) [SSC Matric Level Exam 2002] Exp: Enamel is the hardest substance in the human body. It covers the crown of teeth. It protects the teeth against degradation.
46.The strongest bone of the body is present in the- (A) Thigh (B) Jaw (C) Arm (D) Neck
(A) [SSC Matric Level Exam 2002] Exp: The femur or thigh bone is the strongest bone in the body. It is the hardest bone and can bear up to 1500- 2400 pound load/ pressure
47.An adult human normally has- (A) 6 molar Teeth (B) 8 molar Teeth (C) 10 molar Teeth (D) 12 molar Teeth
(D) [SSC Matric Level Exam 2002] Exp: Adult humans have 12 molar teeth. Mammals have 4 kinds of teeth: incisors (i) canines (C), premolars (PM) and molars (M). These teeths are arranged in 4 sets with a dental formula = 2I.1C.2PM.3M 2I.1C.2PM.3M 2× The teeth are present in maxilla and mandible jaw.
48.The total number of ear bones is- (A) 2 (B) 4 (C) 6 (D) 8
(C) [SSC Matric Level -2001] Exp: There are total 6 bones present in both ears of human beings. The ear bone has three sections Malleus, incus and stapes, joined together to form ossicles. Stapes is the smallest bone in human boby.
49.The connective tissue that connects a muscle to a bone is (A) Cartilage (B) Ligament (C) Tendon (D) Interstitial fluid
(C) Exp: Connective tissues are connect to system by collagenous fibrous that vary only in their density and cellularity. Tendon connects a muscle to bones, and ligament connect bone to bone.
50.The hardest part of the body is ______. (A) Bones (B) Tooth Enamel (C) Skull (D) Spinal Cord
(B) Exp: The hardest part of the body is tooth enamel. It covers the crown of tooth sides. Enamel contains the highest percentage of minerals (96%) with water and organic material. The primary mineral is hydroxyl apatite which is a crystalline calcium phosphate.
51.How many types of teeth are there in humans? (A) 4 (B) 5 (C) 2 (D) 3
(A) Exp: There are four types of teeth present in hum There teeth are named as incisors, canines, premolars and molars. These are present in 4 equal set in maxilla and mandibles jaw.
52.Our bones and teeth are generally made of__ (A) Tricalcium phosphate(B) Fluoropetite (C) Chloropetite (D) Hydrolith
(A) (SSC Sec. Offier 1997) Exp: Bones and teeth are made of Tricalcium phosphate bones and teeths are made of calcium and phosphate which together form the salts of Tricarboxylic phosphate [Ca3(Po4) 2]. It is also referred as calcium orthophosphate.
53.Sweat glands in mammals are primarily concerned with (A) Removal of excess salts (B) Excretion of nitrogenous wastes (C) Thermoregulation (D) Sex-attraction
(C) (SSC CGL 2008) Exp: Sweat glands in mammals are primarily concerned with process that allows body to maintain its core internal temperature and maintain homeostasis.
54.The limb bones of children become bent if there is deficiency of vitamin (A) A (B) B1 (C) D (D) E
(C) (SSC Tax Assistant 2009) Exp: Deficiency of Vitamin D or Cholocalciferol cause the deficiency disease named as rickets and osteomalacia. Rickets leads to bone deformation i.e. bent in the limbs of childrens.
55.Bones are pneumatic in (A) Fishes (B) Amphibians (C) Reptiles (D) Birds
(D) (SSC FCI 2012) Exp: The skeleton of birds consists of very light weighted bones, with large air filled cavities called pneumatic cavities. These bones makes the body of birds lighter and helps of flight for longer distance
“56.”“Sodium Pump”” operates in (A) Muscle contraction (B) Heart beat (C) Nerve impulse (D) None of the baove”
“(C) (SSC CML-1999) Exp: ““Sodium pump”” operates in nerve impulse. The mechanism is the transmission of neuron singal by the neurotransmitter acetylcholine. When the neurotransmitter travels through never the sodium and potassium ion exchange their position through the ionic gates or channals.”
57.What does enamel cover? (A) Crown of the tooth (B)Dentin on all sides (C) Cementum (D) Cementum and partly dentin
(A) (SSC CML-1997) Exp: Enamel covers the crown of the tooth area. Enamel does not contain collagen but contain two unique classes of proteins- amelogenens and enamelins.
58.The contractile proteins in a muscle are (A) Actin and Myosin (B) Actin and Tropomyosin (C) Myosin and Troponin (D) Troponin and Tropomyosin
(A) (SSC 10+2 -2010) Exp: Skeletal muscles have the muscle bundle made up of contractile proteins actin and myosin. Actin and myosin are arranged parallely and their movement generate the ATP for muscles contraction and relaxation.
59.Osteocytes are found in (A) Bone (B) Blood (C) Cartilage (D) Lymph
(A) (SSC Stenographer 2011) Exp: Ostecoytes are the bone cells. Ostecoytes reside inside spaces called lacunae. Ostecocytes/osteoblasts develope in mesenchyma.
60.Fat present below the skin surface in our body acts as a barrier against (A) Loss of heat from the body (B) Loss of essential body fluids (C) Loss of salt from the body (D) Entry of harmful micro-organisms from the environmental
(A) (SSC Sec. Offier 2011) Exp: Fats are deposited in adipose tissues and lie beneath the layer of skin and org Adipose are loose connective tissues and acts as a subcutaneous layer, providing insulation from heat and cold.
61.Of which tissue nails, hoofs and and horns are made of? (A) Cuticle (B) Chitin (C) Keratin (D) Tunicin
(C) (SSC 10+2 -2011) Exp: Keratin is a fibrous structural proteins keratin protects the epithelial cells from damage and stress. Nails, hoofs and horns are made of - keratin. The b kertains is harder and are found only in living reptiles and birds. They form the shells, feathers, beaks and claws of the birds.
62.Jaws are absent in: (A) Birds (B) Fishes (C) Protochoradates (D) Reptiles
(D) (SSC (10+2) -2012) Exp: Protochordata or acraniata are the invertebrates belongs to phylum chordate and non vertebrate Organism have, a rod -like structure called notochord, which provided skeletal to the body. Have the paired pharyngeal gell slits for circulation of water. past- B-anal tail is present. Jaw is not present the phylum is divided into urochordata and cephalochordata. Eg, Balanoglosssus Herdmania and Amphioxus.
63.Grey hair is caused due to (A) Aging of epidermal cells (B) Death of dermal cells(C) Loss of sebum in epidermal cells (D)Loss of melanin in epidermal cells
(D) (SSC DPSI 2012) Exp: Melanin is a complex polymer derived from amino acid tyrosine. Melanin is responsible for determining skin and hair colour skin cells have Melanocyte cell which produce melanin in the body.
64.Wings of a bird and an insect are (A) Homologous organs (B) Analogous organs (C) Vestigial organs (D) Rudimentary organs
(B) (SSC Multi-Tasking Staff 2013) Exp: Wings of a bird and an insects are analogous org Analogous organs are those organs whose structural and embryological derivation is different but the function they perform is same.
65.The skin biting mosquito has legs as locomotory organ which are (A) Four pairs (B) Three paris (C) Two pairs (D) One pair
(B) (SSC Constable 2013) Exp: Mosquito belongs to phylum Arthropoda and category insect. Arthropoda has the characteristic features which includes the three pairs of legs, A pair of antennae and wings.
66.Teeth and Bones acquire strength and rigidity from (A) Calcium (B) Flourine (C) Chlorine (D) Sodium
(A) (SSC CGL 2013) Exp: Teeth and bones are made of calcium and phosphorous. Calcium provides the strengthening and rigidity to teeth and bones. Vitamin D helps in absorption of Calcium.
67.The type of tail found in Shark is (A) Protocercal (B) Homocercal (C) Heterocercal (D) Diphycercal
(C) (SSC CGL 2013) Exp: Tail found in shark is Heterocercal caudal fins. The tail of shark consists of the caudal peduncle and the caudal fin. This type of tail provided the main source of thrust for the shark.
68.Bone osification test is conducted to as certain human (A) Brain efficiency (B) Tentative age (C) Tentative height (D) Drug addiction
(B) (SSC MTS-2014) Exp: Ossification is the process of formation of new bone by cells called osteoblosts. Ossification test is based on the fusion of joints in the human body.
69.Water flows off the wings of birds and insects due to the presence of (A) Waxes (B) Sugars (C) Proteins (D) Minerals
(A) (SSC CGL 2015) Exp: Wings of a birds and insects have the coating of waxes which helps in resistance of water and easy flight of birds and insects.
70.Which one of the following chemicals is associated with muscle fatigue? (A) Uric acid (B) Acetic acid (C) Pyruvic acid (D) Lactic acid
(D) (SSC CGL 2015) Exp: Muscle helps in conversion of lactic acid into ATP during the respiration process. Muscle fatigue refers to the decline in muscle force generated over time. Glycogen is an intramuscular storage form of glucose, after generating energy it produce lactic acid as a metabolic byproduct.
71.Approximate number of skeletal muscles is: (A) 500 (B) 700 (C) 200 (D) 206
(B) (SSC CHSL 2015) Exp: Approximate number of skeletal muscle in human body are 700. Muscles joins with bones to provide flexibility and movement. Tendon helps to attach the muscles to a bone.
72.To reduce tooth decay most toothpastes contain a (A) Bromide (B) Fluoride (C) Iodide (D) Chloride
(B) (SSC CHSL 2015) Exp: Fluoride helps in dental health by strengthening the teeth enamel. Making it more resistant to tooth decay. Flouride reduces the amount of acids produce by bacteria.
73.The parts of human body affected by Pyria are: (A) Eyes (B) Small intestine (C) Teeth and gums (D) Large intestine
(C) (SSC CPO SI, ASI 2016) Exp: Pyria is a severe teeth disease, which damages teeth and gums and generate foul smell from the breathing of the person suffering from the disease. Symptoms of Pyria resultant in bleeding, swelling, foul smell from teeth.
74.The name of the longest muscle in human body is (A) Sartorius muscle (B) Massete muscle (C) Stapedius muscle (D) Gluteus Maximis muscle
(A) (SSC CPO SI, ASI 2016) Exp: Sartorius muscle is the longest muscle in human body. It runs from the anterior superior iliac spine to the proximal tibia of thigh bone. It helps in the rotation of thigh and knee.
75.What causes the mottling of the dental enamel? (A)High levels of chlorine in water (B) High levels of nitrate in the water (C) High levels of fluorides in the water (D) High levels of calcium in the water
(C) (SSC CGL 2016) Exp: Fluoride although helps in strengthing of tooth enamel and prevents tooth decay but excess level of fluorides in water causes the mottling of the dental enamel. i.e. irregular spots or marks.
76.Which of the following is an example of Ball and Socket joint in humans? (A) Wrist Joint (B) Hip Joint (C) Finger Joint (D) Neck Joint
(B)Exp: Ball and socket joint are special class of synovial joints. Due to their structure it posess the easy motion of skeletal. Hip joint and pectoral girdle are the types of Ball and socket joint. They are also known as ‘spheroidal joints’.
77.Which of the following is the longest bone in human body? (A) Forearm bone (B) Chest bone (C) Femur bone (D) Shoulder bone
(C) (SSC CPO 2017) Exp: Femur or thigh bone is the largest and strongest bone in human body. It connects with the pelvic bone in upper part and tibia and fibula in knee region.
78.Where is Stapes bone found in human body? (A) Fingers (B) Nose (C) Ears (D) Thumb
(C) (SSC CPO 2017) Exp: Stapes bone is present in ears. The ear ossicles of middle ear is comprises of three bones named as stapes, malleus and lncus. Stapes is the smallest bone of human body.
79.Two Bones are connected to each other by connective tissue called as _____. (A) Tendon (B) Ligament (C) Neuron (D) Adipose
(B) (SSC CPO 2017) Exp: Ligaments are the connective tissues which connects two bones together. It helps in easy movement of bones
80.Muscles are connected to bones by connective tissue called as _____. (A) Tendon (B) Ligament (C) Neuron (D) Adipose
(A) (SSC CPO 2017) Exp: Tendons are the types of fibrous connective tissues. Tendons connects the msucle to bones. Tendons are made up of collagen.
81.Which of the following is not a connective tissue? (A) Adipose Tissue (B) Compact Bone (C) Cardiac Muscle (D) Areolar Tissue
(C) (SSC CPO 2017) Exp: Cardiac muscle are the type of muscular connective tissues. There are four different types of connective tissues present in animals. They are named as epithelial tissues, connective tissues, muscular tissues and nervous tissues.
82.Which is the longest bone in human body? (A) Febula (B) Tibia (C) Stapes (D) Femur
(D) (SSC CGL 2017) Exp: Femur (thigh bone) is the longest and strongest bone in the human body. Femur connects the pelvic girdle to the patella or knee cap. Femur have the bone marrow tissue on the upper part.
83.How many pairs of ribs are there in human body? (A) 13 (B) 11 (C)12 (D) 14
(C) (SSC CGL 2017) Exp: There are total 12 pairs of ribs present in human body. These ribs are divided into two types, true ribs or fixed rib are first seven pairs attaches to the sternum directly and other five are known as false ribs.
84.In how many parts is the human brain divided? (A) 2 (B) 3 (C) 4 (D) 5
(B) (SSC CGL 2017) Exp: Human brain is divided into three types fore brain, mid brain and hind brain. The largest part of the brain is fore brain. Brain recieves the maximum amount of blood and oxygen.
1.Which of the following release sex hormone- (A) Adrenal gland (B) Thyroid gland (C) Pituitary gland (D) Sebaceous gland
(A) [SSC CHSL 2011] Exp: Adrenal is a hormone secreting gland present on the upper & outer part of kidney and is divided into adrenal cortex and adrenal medulla. Adrenal gland releases thirty hormones, including androgen, estrogen, corticostatin etc.
2.Lactation hormone release from the- (A) Mammary gland (B) Placenta (C) Testis (D) Pituitary
(D) [SSC (10+2) 2013] Exp: Lactation hormone release from the pituitary gland. It activate the mammary gland for the secretion of milk. The mechanism starts from hypothalamus, which signals the posterior pituitary gland to produce oxytocin.
3.Where Pituitary gland found in body- (A) On the base of heart (B) In base of the brain (C) In neck (D) Abdomen
(B) [SSC CGL 2010, SSC MTS 2002] Exp: Pitutary is the smallest gland of human endocrine system found in the base of brain. Pituitary is divided into two types anterior pituitary or adenohypophysis and posterior pituitary or neurohyphysis.
4.Which of the following gland regulate the body temperature or thermoregulatory. (A) Pineal gland (B) Pitutory gland (C) Avatu gland (D) Hypothalamus
(D) [SSC CGL 2002, SSC MTS 2006] Exp: Hypothalamus is the of part fore brain hypothalamus connects the nervous system to the endocrine system by pituitary gland. Hypothalamus regulate the body temperature or thermoregulation. Hypothalamus controls the hunger, thirst and sexual arousal.
5.Which is the center of human body regulate angry, water balance and body temperature- (A) Veins (B) Medula oblongata (C) Thalamus (D) Hypothalamus
(D) [SSC LDC 2005] Exp: Same as above
6.Which gland of human body regulates the recreation of the hormone of pituitary gland? (A) Hypothalamus gland (B) Thymus gland (C) Thyroid gland (D) Adrenal gland
(A) [SSC CHSL (10+2) 2013] Exp: Hypothalamus is responsible for the involuntary and regulation of metabolic processes. It releases hypothalamic hormone and controls body temperature, hunger, thirst, fatigue, sleep and circadian rhythms.
7.In which following Not act both Exorine and endocrine gland- (A) Pitutary gland (B) Pancrease (C) Kidney (D) Testis
(A) [SSC CHSL 2013] Exp: Pitutary is an endocrine gland. It is a pea sized gland protected in bony enclosure called the sella turcica. Hormones secreted from pituitary gland helps in controlling growth, blood pressure, function of sex organ, thyroid gland, water/salt concentration of kidney temperature regulation & pain relief.
8.In human body largest heterocrine gland as- (A) Thymus (B) Liver (C) Pancreas (D) Spleen
(C) [SSC Steno 2010] Exp: Pancreas is largest heterocrine gland and are known heterocrine because they act as both exocrine and endocrine gland. It acts as endocrine gland by producing several hormones in blood such as Insulin, glucagon and somatostation. It act as exocrine by releasing digestive enzymes.
9.In mammal largest gland found- (A) Hyroid gland (B) Liver (C) Pancrease (D) Spleen
(B) [SSC Steno 2014] Exp: Liver is a large bilobed glandular organ in the abdomen of vertebrates. It is the largest gland found in mammals and involved in many metabolic processes. It is the only organ in human body which can increase its size upto three times.
10.The largest gland which found in our body? (A) Muscle (B) Neuron (C) Liver (D) Non of above
(C) [SSC Steno (Grade D) 2005] Exp: Liver is the largest gland found in human body. It helps in regulation of glycogen, secrete the bile juice from gall bladder which helps in emulsification of fats and detoxification.
11.In body which largest endocrine gland- (A) Thyroid (B) Parathyroid (C) Adrenal (D) Pituitary
(A) [SSC CGL 2011] Exp: Thyroid is the largest endocrine gland. Thyroid is present in upper part of larynx in neck. It is a shield shaped, bilobed structure. Thyroid controls the body metabolic rate (BMR) and protein synthesis.
12.In which following endocrine gland found in neck? (A) Pancreas (B) Thyroid (C) Pituitary (D) Adrenal cortex
(B)Exp: Thyroid gland is found in Larynx region of neck. Thyroid gland is stimulated by thyroid stimulation hormone (TSH) released from pitutary gland and release thyroid hormones such as triodothyroxine (T3) and Thyroxine (T4).
13.For the proper functioning of thyroid gland in salt iodine taken in form of- (A) KL (B) KIO3 (C) ICI (D) IBR
(A) [SSC MTS 2014] Exp: In salt iodine, sodium chloride (NaCl) and potassium iodide are added, which maintain the proper functioning of thyroid gland. Due to deficiency of Iodine Goiter disease occur in body.
14.When one or single gene control more than one character then its known as - (A) Saprophic (B) Autotrophs (C) Symbiosis (D) Pleiotropic
(D) [SSC CGL 2014] Exp: Pleiotropic effect is ‘one gene many effect’. When one gene or allele controls more than one character. For eg., skin colour and blood groups.
15.Who discovered insulin- (A) A.F. Bating (B) Edvard Jener (C) Ronald Ros (D) S.A. Vaxmen
(A) [SSC MTS 2011] Exp: Insulin was discovered by Bating and Best in 1932. Insulin is a glucose controlling hormone secreted from Beta cells of Pancreas.
16.Which is the Example of hormone, heat in form of protein- (A) Trypsin (B) Oxytocin (C) Keratine (D) Caesin
(B) [SSC CGL 2013] Exp: Oxytocin is a hormone, which act in form of protein. Oxytocin is also known as pregnancy and delivery hormone released from posterior pituitary.Oxytocin was discovered by Henry Dale in 1906.
17.Which chemical is involved in attraction between one species of animals to another own species animals- (A) Hormone (B) Nucleic acid (C) Pheromone (D) Steriods
(C) [SSC Tax Asst 2009] Exp: Pheromones are the chemical substances produced and released into the environment by an animal, to attract its own species. These chemical messenger affects the nervous system, hormonal system, inflammatory and immune system.
18.Which gland in human body is not related to excitement of body? (A) Thyroid Gland (B) Panerease (C) Adrenal cortex (D) Pitutary
(C) [SSC CPO 2011, SSC MTS 2011] Exp: Adrenal cortex in human body is related to excitement of body. Adrenal gland is located on the upper part of kidney. Adrenal gland releases adrenalin hormone, steroids aldosterone and cortical hormone. Adrenal gland is also known as emergency gland.
19.During excitement, which hormone release higher amount- (A) Cortison (B) Serotonin (C) Adrenaline (D) Esterogen
(C) [SSC Tax Asst. 2006] Exp: Adrenaline released from Adrenal gland, it is secreted during excitement and releases mineralocorticoids, glucocorticoid and androgens. Adrenal gland is also known as emergency gland.
20.Which is male sex hormone? (A) Progestron (B) Esterogen (C) Testestrone (D) Insulin
(C) [SSC CGL 2014] Exp: Testosterone is a male sex hormone. Testosterone plays an important role in development of male reproductive tissues such as testis and prostate and development of secondary sexual characters.
21.In which of the following known as emergency hormone- (A) Adrenaline (B) Thyroxine (C) Vasopressin (D) Insulin
(A) [SSC CGL 2015] Exp: Adrenaline is known as emergency hormone because it prepares the body for fear, flight and fright, response in times of stress i.e. for vigorous and sudden action.
22.Which harmone secreation from the corpus lutcum- (A) Progesteron (B) Testosterone (C) Estrogen (D) Haemoglobin
(A) [SSC CGL 2014] Exp: Corpus luteum is the resultant of secondary follicle generated after the formation of ovum in ovaries of female. After the ovulation (releasing of eggs), the degeneration of corpus luteum results in secretion of progesteron.
23.The production of growth hormone is occurs. (A) By thyroid gland (B) By Pituitary gland (C) By Gonad (D) By bone
(B) [SSC MTS 2014] Exp: Pityitary gland is also called as ‘Growth hormone’ (GH) or somatotropin. GH is a peptide hormone it stimulates growth, cell reproduction and cell regeneration. Protein encoded by Growth Hormone plays an important role in growth control.
24.Grave disease occurs due to- (A) Hyper secretion of thymus (B) Hyper secretion of thyroid (C) Hypo secretion of thymus (D) Hypo secretion of thyroid
(B) [SSC (10+2) 2012] Exp: Hyperthyroidism or hyper secretion of thyroid leads to a disease called Graves diseases. It is an autoimmune disease results in enlarged goitre. Symptoms include muscle weakness, sleeping disorder, fast heart beat and weight loss. Graves disease also known as toxic diffuse goitre.
25.Which is pepsin releasing cells of stomach? (A) Acidic cell (B) Inlite cells (C) Main cells (D) Spincter cells
(C) [SSC (10+2) 2012] Exp: Pepsin is a digestive enzyme which helps in degradation of proteins in stomach. Enzyme pepsin is released from main cells of stomach.
26.In mammal receptor or sense gland related to- (A) Removal of extra mineral (B) Elimination of nitrogenous wastes (C) In temperature regulation (D) In sex attraction
(C) [SSC CGL 2008] Exp: Receptor or sense gland is related to temperature regulation. Receptors are the group of specialised cells. These receptors helps in detecting the environmental change.
27.In Human throat, which is known as Adam’s apple- (A) Ciuoroid or Laryme Cartilage (B) Throat (C) Laryme (D) Thyroid Cartilage
(D) [SSC CPO 2012] Exp: Adam’s apple is related to the deepening of the voice. During adolescent stage the thyroid cartilage grows together with larynx. Thyroid cartilage grow in size in males.
28.During single Menstural cycle, generally the no of mature egg- (A) 3 (B) 2 (C) 1 (D) 4
(C) [SSC CGL 2013] Exp: Menstrual cycle is a series of natural process that occurs in female reproductive system. At the time of female ovaries has 80,000 egg, which are released after puberty. Due to hormonal changes every month ovaries releases around 8 to 10 Egg out of which only single egg get matured and released for the fertilisation by a process called ovulation .If the ovum (egg) get fertilised, it results into zygote, if not, then unfertilised egg with blood released out of the uterus, by the process called menstrual cycle.
29.Which of the following deficiency causes Goitre- (A) Iron (B) Sodium (C) Potassium (D) Iodine
(D) [SSC MTS 2006, SSC FCI 2012] Exp: Iodine is an important mineral nutrient required for the proper functioning of Thyroid gland. Deficiency of Iodine causes goitre disease in which thyroid gland enlarged in size and results into improper functioning.
30.Which is caused by deficiency of iodine- (A) Hyperthyroidism (B) Goitre (C) Grave (D) Diabites
(B) [SSC (10+2) 2011] Exp: Goitre occurs due to deficiency of iodine in this thyroid gland enlarged in size, which cause swollen of neck. The recovery of iodine deficiency occurs after intake of iodine salt, fish and green and leafy vegetable.
31.Iodine-less salt is useful for- (A) For slow blood pressure (B) For prevention of dehydration (C) For activity of thyroid gland (D) For salivary gland
(C) [SSC Tax Asst. 2006] Exp: If the body is getting enough iodine then there is no requirement of consumption of iodised salt Iodine is a vital micronutrient required by Human body. Deficiency of Iodine cause goitre.
32.The Pigment which given colour to Human body- (A) Melanin (B) Rhodopsin (C) Iodopsin (D) Anthrocyanin
(A) [SSC CPO 2007, SSC MTS 2002] Exp: Pigment melanin gives colour to skin and hair. Melanin is produced by pituitary gland named as Melancyte Stimulating Hormone (MSH). The different forms of MSH belongs to a group called the melanocortins.
33.A.C.T. hormone release by- (A) From Adernal cartex(B) From Adernal medulla (C) From pituitary gland (D) From pineal
(C) [SSC CHSL (10+2) 2012] Exp: Adreno Cortico Tropic Hormone (ACTH), is released from pituitary gland. Its principal effects are release of corticosol from adrenal gland.
34.Diabetes mellitus occur due to lack of synthesis of hormone- (A) Insulin (B) Glucogon (C) Thyroxine (D) Androgen
(A) [SSC MTS 2014] Exp: Diabetes mellitus is a condition of high blood sugar level. Insulin secreated from Beta cells of pancreas which controls the blood sugar level.
35.Which phenomenon do bats or dolphins use to find prey, predators or obstacles? (A) Refraction of Sound (B) Formation of Beats (C) Scattering of Sound (D) Echolocation
(D) [SSC CGL 2011] Exp: Echolocation works in similar way as sonar. Bat make noise as they fly and listen to the returning echoes to build up a sonic map of their surrounding. Individual bat species can echolocate within specific frequency range that suit their environment and prey types.
36.In which one of the following is swim bladder absent? (A) Cuttlefish (B) Bony fish (C) Cartilaginous fish (D) Silverfish
(C) [SSC Steno. 2011] Exp: Swimbladder or air bladder are absent in cartilagenous fishes. These fishes are mostly found in benthic regions of water bodies.
37.The Example of hermaphrodite animal in which cross fertilisation occurs in- (A) Hydra (B) Ascaris (C) Earthworm (D) Silkworm
(C) [SSC (10+2), DEO & LDC 2011] Exp: Hermaphrodite animals are those animals in which the single organism produces both egg and sperm i.e., female and male reproductive organ. Earthworms belongs to phylum annelida is a hermaphrodite animals and shows the cross fertilisation.
38.’Pigeon Milk’ is produced by- (A) Crop (B) Birds (C) Mammals (D) All of these
(A) [SSC Steno. 2011] Exp: Pigeon milk is secreted by the crop of parent bird where the regurgitation of grains and mixing of saliva with other enzymes takes place. Crop represents the thin-walled expanded portion of alimentary tract used for storage of food prior to digestion.
39.Sweat glands in mammals are primarily concerned with- (A) Removal of excess salts (B) Excretion of nitrogenous wastes (C) Thermoregulation (D) Sex-attraction
(C) [SSC CGL 2008] Exp: Sweat gland in mammals helps in thermoregulation. Thermoregulation helps in maintaining the body temperature by excreting the electrolytes & water.
40.A substance that stimulates the production of antibodies when introduced into a living organism is known as- (A) Carcinogen (B) Androgen (C) Antigen (D) Oestrogen
(C) [SSC CGL 2004] Exp: Antigen are the foreign agents such as viruses or bacteria that stimulates the antibodies generation. Antigen induce the immune system. Antigen binds to specific site on antibodies.
41.The Sigmoid Colon is part of- (A) Anal Canal (B) Large Intestine (C) Ileum (D) Small Intestine
(B) [SSC CGL 2013] Exp: Large intestine is divided into three segments ceacum, colon and rectum. The colon further has three parts tranverse colon, ascending colon and descending colon. Sigmoid colon is the S-shaped region of colon near rectum and anus.
42.Which one of the following gland is responsible for secretion of sex hormones? (A) Adrenal Gland (B) Thyroid Gland (C) Pituitary Gland (D) Sebaceous Gland
(A) [SSC (10 +2), DEO & LDC 2011] Exp: Sex hormone or sex steroid are produced by gonads ovaries and testis as oestrogen and testosterone. Sex hormone is released from adrenal gland as androgen. Sex hormones helps in development of primary and secondary sexual character.
43.The largest organ of human body is- (A) Heart (B) Brain (C) Liver (D) Kidney
(C) [SSC MTS 2011] Exp: The liver is the largest glandular organ of the body and perform many vital function to keep the body devoid of toxins and harmful substances. It is a vital organ that support almost every organ in the body. Without a healthy liver a person cannot complete its metobolic activities.
44.Which one of the following is the smallest endocrine gland in human body? (A) Adrenal (B) Thyroid (C) Pituitary (D) Pancreas
(C) [SSC (10 +2), DEO & LDC 2011] Exp: Pituitary gland or hypophysis is the smallest endocrine gland in human body. Pituitary gland is located below hypothalamus at the base the brain. It is the peasized gland weighing 0.5 gm. Pituitary gland is also known as master gland.
45.The ability of the eye to see in the dark, is due to the production of a purple pigment known as- (A) Carotene (B) Rhodopsin (C) Iodopsin (D) Retinene
(D) [SSC CISF.ASI 2011] Exp: Retinaldehyde or Retinene is a purple pigment which is fundamental pigment in the transduction of light into visual signals at the photoreceptor level of the retina.
46.Which one of the following organ excretes water, fat and various catabolic wastes? (A) Kidney (B) Skin (C) Spleen (D) Salivary Glands
(A) [SSC (10 +2), 2006] Exp: Kindney are the pairs of excretory organs located in the abdomen. Kidney helps in excretion of nitrogenous waste and functions to maintain the osmotic balance and concentration of salts.
47.Pituitary gland is situated in the- (A) Base of the heart (B) Base of the brain (C) Neck (D) Abdomen
(B) [SSC CGL 2010] Exp: Pituitary gland is a pea-shaped gland, present just below the brain and behind the bridge of nose. Pituitary gland release various hormones like growth hormone and sex stimulating hormone.
48.The colour of the eye depends upon the pigment present in- (A) Cornea (B) Iris (C) Rods (D) Cones
(B) [SSC CISF 2010] Exp: The eye colour depends on the amount of pigment found in Iris. Iris consists of two layer, the front pigmented fibro vascular and pigmented epithelial cells. The iris is strongly pigmented with colour like blue, green, brown etc.
49.Enzymes are- (A) Microorganisms (B) Proteins (C) Inorganic Compounds (D) Moulds
(B) [SSC Steno. 2010] Exp: Enzymes are the proteins. All enzymes are biocatalyst which enhance the chemical reactions. Enzymes increase the reaction rate by lowering its activation energy. Activity of enzymes depends on temperature, pH and substrate.
50.The largest mixed gland of human body is- (A) Thymus (B) Liver (C) Pancreas (D) Spleen
(C) [SSC Steno. 2010] Exp: Pancreas are the largest heterocrine gland. Pancreas acts as both exocrine and endocrine gland and are located in the abdominal cavity.
51.A medicine which promotes the secretion of urine is called- (A) Adrenaline (B) Monouretic (C) Diuretic (D) Triuretic
(C) [SSC Tax Asst. 2009] Exp: A Diuretic is any substance that promote the production of urine. This includes forced Diuresis. There are several categories of Diuretics. The antidiuretic such as vasopressin is an agent or drug which reduce the excretion of water in urine and vasodilator which dilates the blood vessels and increase the secretion of urine by increasing the blood pressure.
52.The chemicals released by one species of animals in order to attract the other members of the same species are- (A) Hormones (B) Nucleic acids (C) Pheromones (D) Steroids
(C) [SSC Tax Asst. 2009] Exp: The pheromones are specialised hormones secreted mostly lower organisms to attract the member of same species. The ants and cockroaches shows the best Example in this regard. Sometimes it released by some fungi as well.
53.The source of the enzyme, diastase is- (A) Salivary Gland (B) Stomach (C) Liver (D) Pancreas
(A) [SSC (10+2), DEO & LDC 2008] Exp: Enzyme diastase is released by salivary gland and it initiate the breakdown of starch into maltose. Diastase was the first enzyme to be discovered. It was extracted from malt solution in 1833 by Anselme Payen and Jean-Francois Persoz.
54.Blood pressure is controlled by- (A) Adrenal Gland (B) Thyroid Gland (C) Thymus (D) Corpus Luteum
(A) [SSC CPO 2008, Matric Level 2002] Exp: Blood pressure is controlled by Adrenal gland or suprarenal gland. The adrenal gland produces aldosterone, a mineralo-corticoid, which is important in salt balance, blood volume and regulation of blood pressure.
55.Vitamin-E is particularly important for- (A) Development of teeth (B) Carbohydrate metabolism (C) Normal activity of sex glands (D) General health of epithelial tissues
(C) [SSC CPO 2008, -2001] Exp: Vitamin-E or Tocopherol is fat-soluble antioxidant hormone which is involved in immune function. VitaminE protects the cells from the damaging effects of free radicals. It also helps in normal activity of sex glands or sex hormones.
56.In which of the following generally hormone is not found? (A) Rat (B) Monkey (C) Bacteria (D) Cat
(C) [SSC SO 2005] Exp: Bacteria are prokaryotic, unicellular organisms which do not have hormones like vertebrates. Bacterias are the first to appear on earth.
57.The colour of human skin is produced by- (A) Haemoglobin (B) Insulin (C) Adrenaline (D) Melanin
(D) [SSC CPO 2008] Exp: Melanin is a natural substance secreted by, melanocyte stimulation hormone (MSH) form pituitary gland, Melanin is the primary determinant of skin colour in human. Three basic types of melanin are eumelanin, pheomelanin and neuromelanin.
58.The enzyme that is present in the saliva of man is- (A) Pepsin (B) Renin (C) Amylase (D) Trypsin
(C) [SSC CGL 2007] Exp: Saliva is secreted from salivary gland. Saliva is composed of several components including amylase, which helps in breakdown of starch into maltose and glucose. Amylase helps in digestion of Carbohydrate.
59.Which one of the following does not secrete any digestive enzyme? (A) Liver (B) Salivary Gland (C) Glands of small intestine (D) Pancreas
(A) [SSC Tax Asst. 2007] Exp: Liver is the large glandular organ in the abdomen of vertebrates. The liver is the largest gland of body, weight around 3.2-3.7 pound. Liver does not secrete any enzyme rather it stores the bile juice secreted from bilirubin and biliverdin cells in gall bladder.
60.The function of Trypsin is to- (A) Breakdown Fats (B) Synthesise Proteins (C) Breakdown Proteins(D) Breakdown Carbohydrates
(C) [SSC Matric Level 2006] Exp: Trypsin, is an enzyme secreted from pancreas. It helps in the breakdown of protein to synthesis amino acid. Trypsin breaks the peptide bond.
61.The trace metal present in insulin is- (A) Iron (B) Zinc (C) Cobalt (D) Manganese
(B) [SSC Matric Level 2006] Exp: Insulin is a peptide hormone secreted from Beta cells of pancreas. Insulin is a molecular compound comprises of two alpha and two Beta chains with zinc in centre. Insulin helps to maintain the glucose concentration in blood.
62.The body temperature is regulated by- (A) Pituitary gland (B) Hypothalamus (C) Pineal gland (D) Thyroid gland
(B) [SSC SI 2006] Exp: Hypothalamus is the region of the brain that controls an immense number of body functions. It is located in the middle of the base of the brain and encapsulate the ventral portion of the third ventricle. The pituitary gland is situated just beneath the Hypothalamus.
63.Which of the following hormone is released in excess quantity during excitement? (A) Cortisone (B) Serotonin (C) Adrenaline (D) Oestrogen
(C) [SSC Tax Asst. 2006, SSC CPO 2005] Exp: Adrenalin secreted from adrnal gland is an emergency hormone. Adrenalin is responsible for various metabolic rate like heart rate, pulse rate, blood pressure, blood glucose level. Adrenalin controls the sympathetic and parasympathetic nervous system.
64.A person will have brown eyes, blue eyes or black eyes depending on the particular pigment in the- (A) Pupil (B) Cornea (C) Iris (D) Choroid
(C) [SSC SI 2005] Exp: Iris is highly pigmented with the colour typically ranging from brown, blue or black eyes. Colour of eye is a phenotypic trait and is determined by two factors pigmentation of Iris and scattering of light in stroma of iris.
65.Which of the following structure present in mammalian skin directly helps in keeping the body warm? (A) Pigmented Cells (B) Sweat Glands (C) Lymph Vessels (D) Blood Capillaries
(C) [SSC CGL 2005] Exp: Lymphatic system is a circulatory system in which blood plasma ooze into tissues through the thin walls of the capillaries. Blood plasma contains oxygen, glucose, amino acid and nutrients needed by tissue cells.
66.Which of the following makes the skin layer impervious to water? (A) Collagen (B) Melanin (C) Keratin (D) Chitin
(C) [SSC CGL 2005] Exp: Keratin is the protein fibrils structure, it protects the epithelial cells from damage. Structurally Keratin is of two types -Keratin and -Keratin. Alpha Keratin forms the hair, horns, nails, claws and hooves.
67.The development of an egg without fertilisation is called- (A) Gametogenesis (B) Parthenogenesis (C) Oogenesis (D) Metamorphosis
(B) [SSC Tax Asst. 2005] Exp: Parthenogenesis is the development of embryo without fertilisation. It is a type of asexual reproduction. Particularly common amongst arthropods and rotifers.
68.Sea sickness is due to the effect of the motion of ship on- (A) Internal Ear (B) Heart (C) Stomach (D) Eyes
(A) [SSC CPO 2005] Exp: Sea sickness is a form of motion sickness characterised by a feeling of Nausea and in extreme cases vertigo spending time on a craft on water. It is due to cristae and macula of internal ear which are concerned with balance and endolymph of cochlea.
69.What part of the eye gets inflamed and becomes pink when dust gets into? (A) Cornea (B) Choroid (C) Conjunctiva (D) Sclerotic
(C) [SSC Tax Asst. 2004] Exp: Conjuctiva is the inner surface of eylids and outer surface of the eyeball. Conjuctive is composed of stratified squamous epithelial and stratified columnar epithelial cells. Conjuctive helps in lubricating the eye by producing mucus and tear.
70.Out of the following glands which is referred to as the master gland? (A) Thyroid (B) Adrenal Gland (C) Pituitary (D) Pancreas
(C) [SSC Tax Asst. 2004] Exp: Pitutary is referred to the master gland because it control all the other six glands like adrenal, thymus, thyroid, parathyroid and gonads. It controls the secretion of other glands.
71.Which one of the following is found only in women? (A) Thyroid (B) Pituitary (C) Ovary (D) Adrenal
(C) [SSC CPO 2003] Exp: Ovaries are the part of female reproductive organ, located on either side of abdomen. Ovaries helps in maturation of ovum (egg) and secretion of estrogen and progesterone.
72.Which is the gland that holds the body’s thermostat? (A) Pineal (B) Pituitary (C) Thyroid (D) Hypothalamus
(D) [SSC CGL 2003] Exp: Hypothalamus is the centre located in the brain. It is the part of Fore Brain Hypothalamus is centre of thirst, food and sexual arousal. Hypothalamus regulate the body temperature.
73.Where is the pineal gland situated? (A) In the Liver (B) In the Brain (C) In the Kidneys (D) In the Uterus
(B) [SSC Matric Level 2002] Exp: Pineal gland is situated in the brain. The pineal gland produces melatonin a serotonin derived hormone which modulates sleep patterns in both circadian rhythm.
74.Which one of the endocrine gland is known as Master Gland? (A) Pituitary (B) Adrenal (C) Thyroid (D) Parathyroid
(A) [SSC Matric Level 2002] Exp: Pituitary gland which is located at the centre of the skull, just behind the bridge of the nose. It is about the size of the pea. It is a connecting point between nervous system and endocrine system of the body. As it control various other glands, it is known as ‘Master gland’.
75.Estrogen and progesterone control and stimulate the growth of- (A) Pituitary Gland (B) Thyroid Gland (C) Mammary Gland (D) Supra renal Gland
(C) [SSC Matric Level 2002] Exp: Development of mammary gland is the secondary sexual characteristics and it matures at the time of puberty. Hormones estrogen and progesterone control and stimulate the growth of mammary gland.
76.The membrane covering the lungs is a- (A) Pleura (B) Pericardium (C) Peritoneum (D) Mesothelium
(A) [SSC Matric Level 2002] Exp: Pleural membrane is a fluid filled double layered wall. It protects the lungs during exhalation and inhalation in respiration.
77.The acid present in gastric juice is- (A) Hydrochloric (B) Nitric (C) Sulphuric (D) Ascorbic
(A) [SSC Matric Level 2002] Exp: The parietal or oxyntic cells present in epithelial cell secrete hydrochloric acid. Hydrochloric acid performs two functions • Conversion of pepsin from pepsinogen • To kill the microbes present in food.
78.The organ which stores carbohydrates as glycogen in the human body is- (A) Intestine (B) Stomach (C) Pancreas (D) Liver
(D) [SSC Matric Level 2002] Exp: Liver stores the glycogen. Glycogen is a polysaccharide unit, which is stored and converted into glucose and made accessible to the other organs by the process called glycogenolysis.
79.Bile is stored in the- (A) Gall bladder (B) Duodenum (C) Liver (D) Spleen
(A) [SSC Matric Level 2002] Exp: Gall bladder is a small organ where bile is stored before it released into the small intestine. Humans can live normal without a gall bladder. The surgical removal of gall bladder is called as cholecystoctomy.
80.Which of the following cells secrete insulin? (A) Alpha Cells (B) Delta Cells (C) Nerve Cells (D) Beta Cells
(D) [SSC Matric Level 2002] Exp: Insulin is secreated from Beta cells of pancreas located in islets of Langerh Pancreas have three different types of cells i.e. Beta, alpha and gamma. Alpha cells releases glycogen and gamma cells releases somatostatin.
81.Which of the following is not a gland? (A) Thyroid (B) Stomach (C) Liver (D) Pancreas
(B) [SSC Matric Level 2002] Exp: Stomach is not a gland, it is the broadest part of alimentary canal in Human beings stomach helps in digestion of food and secretion of Hydrochloric acid
82.Metabolism is referred to as- (A) Synthesis of biomolecules (B) Breaking down of biomolecules (C) Synthesis and breaking down of biomolecules (D) Recycling of biomolecules
(C) [SSC Matric Level 2000] Exp: Metabolism is a chemical process in which either the synthesis or breakdown of molecules takes place by the help of enzymes or catalyst. Metabolism is categorized into two type catabolic and anabolic.
83.The functional unit of ‘kidney’ is- (A) Axon (B) Neuron (C) Nephron (D) Artery
(C) [SSC (10 +2), DEO & LDC 2011, 2008] Exp: Nephron is structural and functional unit of kidney its main function is to regulate the concentration of water and soluble substances like salt and glucose. Nephrons are divided into four main parts called as Glomerulus, Bowan’s capsule, tubules and collecting duct.
84.An antibiotic is- (A) A chemical synthesised by a human cell against an microorganism (B) A chemical synthesised by a microorganism against another microorganisms (C) A substance produced by blood cells against bacteria (D) A substance produced by blood cells against infection
(B) [SSC SO 2006] Exp: Antibiotics are medicines that inhibits the growth or destroy microorganism. Antibiotics are prepared form the micro organisms especially by bacteria. The first antibiolic. Penicillin was prepared form bacteria Pencilium notatum.
85.Allosomes are- (A) Cell organelles (B) Plant hormones (C) Alleles (D) Sex chromosomes
(D) [SSC Steno. 2011] Exp: Allosomes are sex chromosomes present in Human beings. The total 23 pairs of chromosomes are divided into two groups i.e. Autosome and Allosomes represents X and Y chromosome in males and X-chromosomes in females.
86.The number of chromosomes present in normal human being are- (A) 23 (B) 46 (C) 22 (D) 48
(B) [SSC SI 2010, CPO 2006] Exp: The total number of chromosomes present in normal human beings are 46 in diploid stage. Out of which 22 pairs of chromosome are know as autosome and 23rd pair is known a Allosome.
87.Amniocentesis is a method for (A) Determination of foetal health conditions (B) Determination of the amino acids sequence (C) Inducing abortion (D) Artificial insemination
(A) [SSC CGL 2002] Exp: Amniocentesis is a medical test that is done during the pregnancy period. It helps to determine birth defects due the chromosomal aberrations Amniocentesis test includes the amniotic fluid.
88.Which cells in pancreas produce Insulin? (A) Thymus (B) Estrogen (C) Corpus epididymis (D) Islets of Langerhans
(D) Exp: Insulin is a hormone that control the glucose concentration in blood. Insulin is produce by islets of Langerhans cells of pancreas.
89.The hormone that stimulates heart beat is (A) Thyroxine (B) Gastrin (C) Glycogen (D) Dopamine
(A) Exp: Thyroxin is a hormone that stimulates the heart beat which is secreted by Thyroid gland.
90.Which of the following is an emergency hormone in humans? (A) Thyroxine (B) Insulin (C) Adrenaline (D) Progestrone
(C) Exp: Adrenaline is a hormone secreted by adrenal medulla during stress. This is called as emergency hormone because it initiate quick reaction and increase metabolic rate. Adrenalene hormone also increase fat metabolism thereby synthesizing more energy
91.Which is the second largest gland of Human body? (A) Liver (B) Large Intestine (C) Thorax (D) Pancreas
(D) Exp: Pancreas is the second largest gland of Human body of about 15cm in length. Pancreas are termed as heterocrine gland i.e. it acts as both exocrine (secretes digestive enzymes) and endocrine (recreates hormones) gland.
92.What does Trypsin do? (A) Breaks down Carbohydrates (B) Synthesizes proteins (C) Breaks down fats (D) Breaks down proteins
(C) Exp: Enzymes Trypsin is released from pancreas and small intestine. The Trypsinogen present in small intestine is converted into trypsin, by a process refers as trypsin proteolysis. Trypsin help is breakdown of proteins into peptides.
93.What may be the cause of malfunctioning of thyroid gland? (A) Iodine deficiency (B) Iron deficiency (C) Calcium deficiency (D) Vitamin C
(A) (SSC CGL 2002) Exp: Thyroid is a shield shaped endocrine gland present in the neck region. Thyroid gland releases thyroxin hormone, which helps in overall development of body. Deficiency of iodine cause the disease goitre in which thyroid gland get swelled up and cause the malfunctioning of thyroid glands.
94.Which was the first enzyme isolated in pure crystalline form? (A) Amylase (B) Catalase (C) Lipase (D) Urease
(D) (SSC Tax Assistant 2004) Exp: Urease was the first enzyme isolated in pure crystalline from in 1926. James B. Summer showed that urease is hydrolysis urea into carbon dioxide and ammonia.
95.What is true about viruses without exception? (A) They contain a core of RNA (B) They can infect bacteria (C) They cannot produce antibodies (D) They cannot multiply only in host cells
(A) (SSCCombined Matric Level 2000) Exp: Virus are the microorganism, infectious agent. Viruses infect the living cells by multiplying its single stranded genetic strand in host cells. D. Ivanovsky discovered the virus in 1892.
96.Which are not included in the milk-teeth in a child of 3-4 years? (A) Incisors (B) Canines (C) Molars (D) Premolars
(C) (SSC CML- 2006) Exp: Molars are the three posterior most teeth present in jaw of 3-4 years child. Molars help in chewing and mastigation of food.
97.Bile is secreted by: (A) Gall bladder (B) Liver (C) Bile duct (D) Pancreas
(C) (SSC Multi-Tasking 2011) Exp: Bile is a yellowish-green fluid secreted from bilirubin and biliverdin cells of liver. It is stored in gall bladder and secreted from liver through bile duct.
98.Which one of the following is the smallest endocrine gland in human man body? (A) Adernal (B) Thyroid (C) Pituitary (D) Pancreas
(C) (SSC (10+2) -2011) Exp: Pituitary gland is the smallest endocrine gland about the size of a pea weighing 0.5 gm in human. Pituitary regulates several physiological processes, hormones and controls the activity other hormones.
99.Which one of the following organs converts glycogen into glucose and purifies the blood? (A) Liver (B) Kidney (C) Lungs (D) Spleen
(A) (SSC (10+2) -2012) Exp: Liver is the largest endocrine gland, main functions of liver. • Secretion of bile juice • Conversion of glycogen into glucose • Detoxification and purification of blood.
100.Which of the following is not an endocrine gland? (A) Pituitary (B) Thyroid (C) Adrenal (D) Spleen
(D) (SSC DPSI 2012) Exp: Spleen in not an endocrine gland, spleen is an abdominal organ which involved in the production and removal of blood cells and forms the part of the immune system.
101.An example of protein which acts as a hormone is: (A) Trypsin (B) Oxytocin (C) Keratin (D) Casein
(B) (SSC CGL 2013) Exp: Hormones are released from endocrine gland and function for specific purpose at the target site. Oxytocin is a protein derivative hormone oxytocin functions as birth and sexual reproductive hormone.
102.The hormone used as an oral contraceptive is: (A) Cortisone (B) Progesterone (C) Testosterone (D) Aldesterone
(B) (SSC CGL 2013) Exp: Progesterone hormones use as an oral contraceptive and use to avoid unwanted pregnancy. High level of progesterone does not allow the fertilization of egg.
103.Conglobate gland is a leaf like structure found in (A) Female Cockroach (B) Male Cockroach (C) Male Ascaris (D) Female Ascaris
(B) (SSC CGL 2013) Exp: Conglobate glands or phallic glands is a long club shaped accessory gland present in males. It helps in storage of spermatozoa.
104.Lactogenic hormone is secreted by (A) Mammary glands (B) placenta (C) Ovary (D) Pituitary
(D) (SSC Level Data Entry 2013) Exp: Loctogenic hormone is secreted by anterior pituitary gland Lactogenic is gonad tropic hormone which stimulate the production of milk after parturition. It also stimulates the gonads and controls reproductive activity.
105.Which glands in the human body regulates the secretion of hormones from the pituitary glands? (A) Thymus gland (B) Thyroid gland (C) Adrenal gland (D) Hypothalamus gland
(D) (SSC Level Data Entry 2013) Exp: Hypothalamus gland is a part of forebrain. Hypothalamus controls the secretion of hormones from pituitary gland. Hypothalamus link the nervous system to the endocrine system through pituitary.
106.Insulin: (A) Increase blood sugar (B) Decrease blood sugar (C) Constricts blood vessels (D) Stimulates lactation
(B) (SSC Multi-Tasking 2014) Exp: Insulin regulate the concentration of sugar (glucose) from carbohydrates in the food. Insulin help to keeps blood sugar level from getting too high (hyperglycemia) or too low (hypoglycemia)
107.An example of hormone is (A) Cytosine (B) Renin (C) Oxytocin (D) Peprin
(C) (SSC CHSL 2015) Exp: Oxytocin is a powerful hormone that acts as neurotransmittor in the brain. Oxytocin is a birth hormone and generally stimulated during sex, birth, lactation and parturition.
108.The hormone that stimulates heart beat is: (A) Thyroxine (B) Gastrin (C) Glycogen (D) Dopamine
(A) (SSC CGL 2016) Exp: Thyroxin hormones is secreted from thyroid gland. Thyroxin regulate the basal metabolic rate (BMR) by stimulating heart rate, respiratory rate and control body temperature.
109.Which of the following cells secret insulin? (A) A cells (B) B cells (C) G cells (D) Nerve cells
(B) (SSC CPO 2017) Exp: Insulin is secreted from beta cells of pancreas. Insulin helps in maintaining the level of glucose in the blood.
110.Which of the following glands secret growth hormone? (A) Adrenal (B) Pituitary Gland (C) Gonads (D) Pancreas
(B) (SSC CPO 2017) Exp: Pituitary gland is known as master gland. It controls the quantity of secretion of all other glands present. It secretes the growth hormone and stimulate the thyroid and parathyroid glands.
111.Which of the following drug is used to get pain relief in muscles? (A) Analgesics (B) Antibiotic (C) Antiseptics (D) Antidotes
(A) (SSC CPO 2017) Exp: Analgesics are drugs which is used as painkiller. It acts on central and peripheral nervous system without loss of consciousness. Common analgesics are ibuprofen, naproxen and morphine.
