Biology

Question 1

What is active transportation?

Answer 1

Active transport is the movement of molecules across a membrane, from a region of their lower concentration to a region of their higher concentration, i.e. aganist the diffusion or concentration gradient.

Question 2

Chlorophyll in photosynthetic prokaryotic bacteria is associated with

Answer 2

membranous vesicles

Question 3

Which of the following organisms is responsible for sleeping- sickness?

Answer 3

Trypanosoma

Question 4

What are smooth muscles?

Answer 4

Smooth muscles are involuntary muscles as their functioning cannot be directly controlled by our own will.

Question 5

Which one of the following cell organelles is known as ‘suicidal bags’ of a cell?

Answer 5

Lysosomes

Question 6

Which one of the following is the correct sequential phase in the successional development of vegetation community in a habitat?

Answer 6

Nudation, migration, reaction and stabilisation

Question 7

Which one of the following acids is also known as vitamin-C?

Answer 7

Ascorbic acid

Question 8

Which one of the following is not
found in animal cells?

Answer 8

Cell wall

Question 9

Which one of the following functions is not carried out by smooth endoplasmic reticulum?

Answer 9

Synthesis of protein

Question 10

Which one of the following cell organelles mainly functions as storehouse of digestive enzymes?

Answer 10

Lysosomes

Question 11

Which one of the following tissues is responsible for increase of girth in the stem of a plant?

Answer 11

Lateral meristem

Question 12

Haemoglobin of RBC can carry
both _______

Answer 12

oxygen and carbon dioxide

Question 13

Urea is produced in ____

Answer 13

liver

Question 14

Which of the following is/are the main absorbing organ/organs of plants?

Answer 14

Roots

Question 15

In which one of the following physiological processes, excess water escapes in the form of droplets from a plant?

Answer 15

Guttation

Question 16

If the xylem of a plant is mechanically blocked, which of the following functions of the plant will be affected?

Answer 16

Transport of water and solutes

Question 17

Which one of the following is the special type of milk produced by a lactating mother, essential for the development of immune response of newborn baby in human?

Answer 17

Colostrum

Question 18

Which one of the following statements explains higher mutation rate and faster evolution found in RNA virus?

Answer 18

RNA is relatively unstable compared
to DNA

Question 19

_______ is a process of progressive accumulation of heavy metals and pesticides in an organism.

Answer 19

Bioaccumulation

Question 20

Large fishes of the pond are found to have higher concentration of pesticides than planktons of the same pond. (True or false)

Answer 20

True

Question 21

A person may suffer from tuberculosis if she/he frequently visits crowded place.

Answer 21

Bacteria of tuberculosis spread through droplets by sneezing or coughing.

Question 22

Which one of the following is a true fish as per the biological system of classification?

Answer 22

Flying fish

Question 23

In which one of the following types of connective tissue in animals does fat get stored?

Answer 23

Adipocyte

Question 24

Lysosome is formed from which
of the following cell organelles?

Answer 24

Golgi bodies

Question 25

A protein is synthesised in the endoplasmic reticulum bound ribosomes and it targets to the inner thylakoid space of chloroplast. How many double-layered membrane layers it has to pass to reach its destination?

Answer 25

4

Question 26

What is lymph?

Answer 26

lymph is a colourless fluid containing specialised lymphocytes, not RBCs. It circulates throughout the lymphatic system. Lymph is also an important carrier for nutrients, hormones, etc.

Question 27

All amphibians and few reptiles have _____-chambered heart.

Answer 27

Three

Question 28

Which one of the following elements is involved in the control of water content of the blood?

Answer 28

Potassium

Question 29

Which one of the following elements is essential for the formation of chlorophyll in green plants?

Answer 29

Magnesium

Question 30

Which one of the following proteins gives lustrous shiny appearance to silk fibre?

Answer 30

Fibrin

Question 31

Blue baby syndrome is caused by the contamination of

Answer 31

Nitrite (NO2−)

Question 32

A biological community in its environment such as a pond, an ocean, a forest, even an aquarium is known as

Answer 32

biome

Question 33

The foul smell of urine of a healthy man having healthy food, when spilled on floor, is mainly due to the bacterial decomposition of

Answer 33

Urea

Question 34

Which one of the following gases is released mostly from landfills in urban areas?

Answer 34

Methane

Question 35

Which one of the following is considered as ‘good cholesterol’ with reference to individuals facing the risk of cardio-vascular diseases and hypertension?

Answer 35

High Density Lipoprotein (HDL)

Question 36

Dengue virus is known to cause low platelet count in blood of patient by

Answer 36

accumulating platelets in intestine.