RL MISELENEOUS SCI 1 Flashcards
(309 cards)
1
Q
●Ordinary table salt is sodium chloride. What isbaking soda?
A
Sodium bicarbonate
2
Q
●Pollination is best defined as:
A
transfer of pollenfrom anther to stigma
3
Q
●Plants receive their nutrients mainly from:
A
Soil
4
Q
●Movement of cell against concentration gradient iscalled:
A
Active trasnport
5
Q
●Photosynthesis generally takes place in which parts ofthe plant?
A
Leaf and other chloroplast bearingparts
6
Q
●Most fish do not sink in water because of the presenceof:
A
swim bladder and air bladder
7
Q
●Plants synthesiss protein from:
A
Aminod acids
8
Q
●Plants absorb dissolved nitrates from soil and convertthem into:
A
Free Nitrogen
9
Q
●Plants absorb most part of water needed by themthrough their:
A
Root hairs
10
Q
●The combined action of photorespiration, photolysisand light and oxygen induced breakdown iscalled:
A
Photo-oxidation
11
Q
●Process of cell division can take place by:
A
Mitosis
12
Q
●Most highly intelligent mammals are:
A
Dolphins
13
Q
●Plant development is influenced by:
A
quality,quantity and duration of light
14
Q
●Prokaryotic cells lack:
A
nucleolus, nuclearmembrane and membrane bound by organelles
15
Q
●Photosynthesis takes place faster in:
A
White Light
16
Q
●Nucleus, the genetic material containing roundedbody in each cell, was first discovered in 1831 by:
A
Robert Brown
17
Q
●Primary phloem develops from:
A
provascular tissue
18
Q
●Other than spreading malaria, anopheles mosquitoesare also vectors of:
A
filariasis
19
Q
●Plants that grow in saline water are called:
A
Halophytes
20
Q
●Placenta is the structure formed:
A
by the union offoetal and uterine tissue
21
Q
●Plants hormone that induces cell division is:
A
Kinins
22
Q
●Neurospora is used as genetic material because:
A
ithas short life cycle of 10 days
23
Q
●Phloem is a tissue found in:
A
Plants
24
Q
●Out of proteins, lipids and carbohydrates present in acell membrane, what is true?
A
Carbohydratesare minimum
25
●Potato is a modified form (outgrowth) of:
Stem
26
●Prothrombin which helps in clotting of blood isreleased by:
Blood platelets
27
●Most of the red, blue and purple colours of plants aredue to a pigment called:
Anthocyanin
28
●Plants growing on sand are called as:
psammophytes
29
●Our skin, when exposed to excess sunlight, becomesdark. This is because our skin pigments called:
Melanin
30
●Ramapithecus and Cro-Magnon man are considered:
Ancestors of modern man
31
●Normal adult human male has:
14 gram ofhaemoglobin/100 gram of blood
32
●Plants wilt due to excess of:
Transpiration
33
Monotremes are unique mammals because they:
layeggs
34
●Poison glands of snakes are homologous to:
salivary glands of vertebrates
35
●Radical vascular bundles are those in which:
xylemand phloem occur on the different radii
36
●Plant bends towards the source of light on account ofthe movement of curvature known as:
phototropism
37
●Plants have ____, while animals lack it.
Cellulose
38
●Photosynthesis is a process which can be describedas:
reductive, endergonic and anabolic
39
●Plants developing in dry conditions are:
Xerophytes
40
●Pigmentation of skin is due to:
Melanocytes
41
●Norepinephrine increases:
Blood pressure
42
●Monocot root differs from dicot root in having:
well developed pith
43
●Radioactivity is a phenomenon of the spontaneousemission of:
Protons, electrons and gamma rays
44
●Organic Substances which, in very small amounts,control growth and development called:
Hormones
45
●Our major foods, fibres, spices, fruits and beveragecrops are:
flowering plants
46
●Movements due to light are shown by:
floweringplants
47
●Outer covering of virus made up of protein is:
Capsid
48
●Radish is a:
modified root
49
●Most common disease of poultry in India is:
Ranikhet disease
50
●Most abundant tissues of our body are:
muscular
51
●Mumps is a disease caused by:
Virus
52
●Rain water helps to increase the ____ to some extent.
Calcium contents
53
●Number of chromosomes in Down's syndrome is:
47
54
●Plants are killed in winter by frost:
because ofdesiccation and mechanical damage to the tissues
55
●Pulses are a good source of:
Protein
56
●Oxygen in our blood is transported by a proteinnamed:
Haemoglobin
57
●Nymph is the name of young one of:
cockroach
58
●Plants that grow under average temperature andmoisture are called:
Mesophytes
59
●Oxyreductases, transferases, hydrolases, lyases,isomerases and ligases are all classes of:
Enzymes
60
●Mutation is:
a change that is inherited
61
●Pollination by wind is called:
anemophily
62
●Pollen grains in plants are produced in:
Flower
63
●Ptyalin is an enzyme produced in the:
salivaryglands
64
●Mycobacterium leprae causes leprosy,Corynebacterium diphtheria causes diphtheriaand Vibrio comma causes:
Cholera
65
●The one which is present in all living things is:
DNA or RNA
66
●The mechanism of stomatal movement is related tothe branch of Biology called:
Physiology
67
●Maximum number of species of living things on earthare:
Insects
68
●Variety among amino acids is produced due to:
RGroup
69
●An enzyme which converts a dipeptide into separateamino acids is an example of:
Hydrolase
70
●Cellular digestion is associated with which organelle:
Lysosomes
71
●Membranes of the grane are sites where:
Sunlightis trapped
72
●The simplest of oxygen producting photosyntheticorganisms are:
Cyanobacteria
73
●Protein coasts of viruses are synthesized in:
LyticCycle
74
●Mycoplasmas have been included in bacteriabecause:
Lack membrane bounded organelles
75
●Yeasts reproduce asexually by forming:
Buds
76
●The one which can tolerate highest external osmoticpressure:
Fungi
77
●Locomotory structures are not found in which of thefollowing group:
Apicomplexans
78
●The cell wall of oomycetes is chiefly composed of:
Cellulose
79
●One celled green ptotists are included in:
Algae
80
●Pick the odd one out:
Psilotum
81
●The one which is incorrect pair:
Dichotomous -Vernation
82
●Double fertilization occurs in:
Angiosperm
83
●Amphoixus is a:
Chordate, Protochordate andLower chordate
84
●Adult birds normally possess only one functional:
Ovary
85
●Following possess bilateral symmetry as larva andradial symmetry as adult:
Echinodermata
86
●How many moles of carbon dioxide are produced bycomplete oxidation of one mole of puruvic acid?
3
87
●The food of hydra consists of:
Small crustaceans
88
●Hunger pangs usually begin ______ after the previousmeal.
12-24 hours
89
●If a plasmolysed plant cell is placed in water the cellwill be:
deplasmolysed
90
●The major constituent of blood plasma is:
Water
91
●Kangaroo rat most probably would be found in:
Desert
92
●The greatest diversity of animals in the lake is foundin which one of the following zones?
Littoralzone
93
●What is the characteristic feature of consumers?
Heterotroph
94
●What percentage of light reaching the earth is used inphotosynthesis?
1%
95
●Competition between species will be greatest if theyattempt to occupy the same:
Niche
96
●In most ecosystems the greatest amount of energyflows through the:
Herbivores
97
●Animals with greatest number of similarities aregrouped together in a/an:
Genus
98
●The structure which has been formed or modifiedfrom gill pouches in humans is:
Eustachiantube
99
●According to Lamarch evolution occurred as theresult of:
Inheritance of acquired characters
100
●The discease in which transmembrane carrier for thechloride ion is not produced is:
Cystic fibrosis
101
●The one which can break open a plasmid ring is:
Ligase enzyme
102
●A genome is:
Full set of genes of an individual
103
●Genes will not be found in gene pairs in the:
Spermcells of frog
104
●In humans the number of tetrads formed during mitosis is:
0
105
●The sequence of 3 bases on tRNA which iscomplementary to condon of mRNA is called:
Anticodon
106
●The basic structural unit of a chromosome is:
Nuceleosome
107
●The first stage of development in which a cavityappears is the:
Balastula
108
●Exposure to low temperature stimulates plants toflower. This is called:
Vernalization
109
●The cells present in testes and secrete testosteroneare:
Interstitial cells
110
●The type of learning in which there is loss or decreasein response to repeated stimuli:
Habituation
111
●The one which causes contraction of wall of theuterus during and after birth:
Oxytocin
112
●The one that stores calcium:
Sarcoplasmicreticulum
113
●Sebum produced from sebaceous glands in a mammalhelps in:
Protection against micro organisms
114
●The Locomotory organ of 'Amoeba' is:
Pseudopodia
115
●The number of chromosomes present in normalhuman being are:
46
116
●An instrument for measuring blood pressure iscalled:
Sphygmomanometer
117
"●The term 'Rh factor"" refers to:"
Rhesus Factor
118
●The discoverer of penicillin was:
AlexanderFleming
119
●Blood groups were discovered by:
Landsteiner
120
●The animal which can tolerate more summer heat is:
Goat
121
●The tissue in man where no cell division occurs afterbirth is:
Nerves
122
●DNA fingerprinting is used to identify the:
Parents, Rapist and Thieves
123
●The normal cholesterol level in human blood is:
180-200 mg%
124
●In a food chain, the solar energy utilized by plants isonly:
0.1 per cent
125
In coriander, the useful parts are:
Leaves & driedfruits
126
●Which plant is called 'Herbal Indian Doctor'?
Amla
127
●The pH of human blood is:
7.4
128
●Which part becomes modified as the tusk ofelephant?
Second Incisor
129
●The noble gas used for the treatment of cancer is:
Radon
130
●Bark of which of the following trees is used as acondiment?
Cinnamon
131
●Saliva helps in the digestion of:
Starch
132
●Iodoform is used as an:
antiseptic
133
●The optimum dissolved oxygen level (in mg/litre)required for survival of aquatic organisms is:
4-6
134
●An example of false fruit is:
apple
135
●Normal fasting blood sugar level per 100 ml of bloodin man is:
80-100 mg
136
●The vector of disease sleeping sickness is:
Tse-tsefly
137
●Cod is a variety of:
Fish
138
●A large number of identical plants can be obtained ina short span of time through a large number ofseeds of:
Tissue culture technique
139
●The smallest flowering plant is:
Wolffia
140
●The tallest and thickest type of grass is:
Bamboo
141
●The process of preventing the birds from flying iscalled:
Brailing
142
●Veins seen in the leaves serve the function of:
Conduction
143
●The edible part of Cabbage is:
vegetative bud
144
●Goitre is caused by the deficiency of:
Iodine
145
●The total number of biosphere reserves present inIndia is:
15
146
●The normal body temperature of human beings is:
98.40 F
147
●Columba livia is the scientific name of:
Pigeon
148
●Bones are pneumatic in:
Birds
149
●An insect - catching plant is:
Nerium
150
●The method not used as a Biological control is:
Useof pesticides
151
●Male (Anopheles) mosquito feeds on:
Nectar offlower
152
●Besides ear ossicles, the cavity of the middle ear inhumans contains:
Perilymph
153
●The percentage of water content in the human bloodplasma normally varies from:
91-92
154
"●""Sodium Pump"" operates in:"
Nerve Pulse
155
●The element which is rich in most leafy vegetables is:
Iron
156
●The function of pacemaker is:
Initiation of heartbeat
157
●The best method of disposal of garbage is:
Landfilling
158
●In 'Scorpion,' poison is present in the:
sting
159
●The end product of the digestion of starch in thealimentary canal is:
Glucose
160
●Number of eyes in an earthworm is:
No eyes
161
●Acupuncture is:
a treatment method with needles
162
●Some viruses have RNA but no DNA. This wouldindicate that:
these viruses have no inheritableinformation
163
●The presence of cavities is an adaptation of:
WaterPlants
164
●Liver-oil of fish is rich in:
Vitamin A
165
●Dialysis is used to perform the function of:
Kidneys
166
●Pesticides are used to destroy:
Insects
167
●What is the common in AIDS, mumps andpoliomyelitis?
These are caused by viruses
168
●Protein which renders a cell less susceptible to attackby viruses is called:
Inferon
169
●Haemophilia is mostly associated with:
Royalfamilies
170
●Approximately, how many times each day does ourheart valves open and lose normally?
1,00,000times
171
●Sugarcane plants are usually propagated byvegetative means because:
They do not produceseeds
172
●The pigment involved in photosynthetic activity is:
Chlorophyll
173
●Free-living nitrogen fixing micro-organism are:
Rhizobia
174
●Aspartame is the name of a product used by diabeticpatients as sweetening agent. It belongs to theclass of:
Peptides
175
●Why radiologists do not take direct X-rayphotographs of intestine?
X-rays are not ableto capture clear picture
176
●Exobiology deals with the study of:
Life in otherplanets and space
177
●A person with 'AB' blood group is sometimes called auniversal recipient because of the:
lack ofantibodies in his blood
178
●The normal temperature of human .body on theKelvin scale is:
310 degree Kelvin
179
●Most of the desert plants bloom during night timebecause:
the desert insects are active duringnight time
180
●It is possible to produce seedless tomato fruits by:
spraying hormones on flowers
181
●Diabetes mellitus is caused due to deficiency ofhormone insulin, secreted by:
Pancreas
182
●People drinking water from a shallow hand pump,are likely to suffer from all of the followingdiseases except:
Fluorosis
183
●Besides proteins and carbohydrates, other elementsof nutritional value found in milk, include:
Calcium and Potassium
184
●Fat present below the skin surface in our body, actsas a barrier against:
loss of heat from the body
185
●Oxygen transportation in a human body takes placethrough:
Lungs, Blood and Tissue
186
●Corpus luteum is a mass of cells found in:
Ovary
187
●Alpha-keratin is a protein, present in:
Skin
188
●What is the average fat content of buffalo milk?
7.2 %
189
●The major component of honey is:
Fructose
190
●Arteries supplying blood to the heart are called:
Coronary arteries
191
●Daily intake of proteins, recommended for amoderately active woman is:
46 gram
192
●A tree species in Mauritius failed to reproducebecause of the extinction of a fruit-eating bird.Which one of the following was that bird?
Dodo
193
●Which one of the following statements regardingstarch and cellulose is correct?
Both of them areof plant origin
194
●Ergotism is due to consumption of:
Contaminatedwater
195
●The complete conversion of glucose, in the presenceof oxygen, into carbon dioxide and water withrelease of energy is called:
Aerobic respiration
196
●The major chemical compound found in humankidney stones is:
Calcium oxalate
197
●The transfer of energy from one chemical substanceto another depends on the size of energy ___emitted from one substance.
Quanta
198
●The existence of characteristic energy levels fordifferent chemical substances is useful for theiridentification by the analysis of ___ lines.
Spectral
199
●In optics, the ___ law relates the absorption of light tothe properties of the material through which thelight is traveling.
Beer-Lambert
200
●The term condensed matter physics was apparentlycoined by ___ when he renamed his researchgroup
previously solid-state theory in 1967. Philip Anderson
201
●Dynamics are described in terms of matter particlesexchanging messenger particles that carry theforces. These messenger particles are known asgluons; W- and W+ and Z bosons; and the ___,respectively.
Photons
202
●The Big Bang model rests on two theoretical pillars:Albert Einstein's general relativity and the ___principle
Cosmological
203
●Chemically, DNA consists of two long polymers ofsimple units called nucleotides, with backbonesmade of sugars and phosphate groups joined by___ bonds.
ester
204
●The ___ system is instrumental in regulatingmetabolism, growth, development, puberty, tissuefunction, internal environment (temperature,water balance, and ions) and also plays a part indetermining mood.
endocrine
205
●___ indicates the molecular weight of a compoundand, from the fragmentation patterns, its structure.
Mass spectrometry
206
●Syphilis is a sexually transmitted disease caused bythe spirochetal bacterium Treponema pallidumsubspecies ___.
pallidum
207
●Pertussis, also known as ___, is a highly contagiousdisease caused by the bacterium Bordetellapertussis.
whooping cough
208
●HIV infects primarily vital cells in the humanimmune system such as helper T cells (to bespecific, CD4+ T cells), macrophages, and ___cells.
dendritic
209
●Hepatitis B is a disease caused by hepatitis B virus(HBV) which infects the ___ of hominoidae,including humans, and causes an inflammationcalled hepatitis.
liver
210
●Momentum is a conserved quantity. Althoughoriginally seen to be due to Newton's laws, this lawis also true in ___.
special relativity
211
●___ is used in MRI and NMR machines, massspectrometers, and the beam-steering magnetsused in particle accelerators.
Superconductivity
212
●When superconductive, a material has an electricalresistance of exactly zero and no interior magneticfield (the ___ effect).
Meissner
213
●Superconductivity was discovered in 1911 by ___,who was studying the resistance of solid mercuryat cryogenic temperatures using the recently-discovered liquid helium as a refrigerant.
HeikeKamerlingh Onnes
214
"●Unit of Mass is defined as ""the mass of a particularsolid cylinder made of platinum-iridium alloy keptin ___, known as the International PrototypeKilogram""."
Paris
215
●The turning effect produced by a force on a rigidbody about a point, pivot or fulcrum is called themoment of a force or ___.
torque
216
●The ___ Barometer is an improved version of thesimple mercury barometer. It gives more accuratereading of the atmospheric pressure because avernier scale is used here.
Fortin
217
●The submarine is an application of ___. On surface,the submarine floats, with its conning tower andmost of the deck, being clear of the water.
Archimedes Principle
218
●The front part of the eye is covered by a transparentspherical membrane called the ___. Light entersthe eye through it.
cornea
219
●The space between the retina and eye lens is filledwith a fluid called ___. It is a spot at which theoptic nerve enters the eye and is insensitive to lightand hence the name.
vitreous humor
220
●A compound is formed by combination of two ormore elements in a definite proportion. Forexample, water is a compound of hydrogen andoxygen elements present in the ratio of ___.
1 :8
221
●A ___ is a solution in which the particle size rangesbetween 10-7 and 10-5 cm. For example, milk,blood, honey, smoke, ink, gum, starch solution etc.
colloid
222
●The outermost shell of an atom cannot accommodatemore than 8 electrons, even if it has a capacity toaccommodate more electrons. This is a veryimportant rule and is also called the ___.
OctetRule
223
●In ___, the Eleventh General Conference of Weightsand Measures recommended an InternationalSystem of Units (abbreviated as SI) based on themetric system of measurement.
1960
224
●If the two forces acting on the body have the sameline of action, then the moment becomes ___.
Zero
225
●Molecules are formed by combination of atoms. Thenumber of atoms, which constitute one moleculeof an element, is called its ___.
atomicity
226
●The cell theory first developed in 1839 by ___ andTheodor Schwann, states that all organisms arecomposed of one or more cells that all cells comefrom preexisting cells.
Matthias JakobSchleiden
227
●___ are self-replicating organelles that occur invarious numbers, shapes, and sizes in thecytoplasm of all eukaryotic cells.
Mitochondria
228
●The cell nucleus is the most conspicuous organellefound in a eukaryotic cell. It houses the cell'schromosomes, and is the place where almost allDNA replication and RNA synthesis (___) occur.
transcription
229
●The function of the ___ is to conduct prepared foodfrom the leaves to the growing parts of the plant and the storage organs.
phloem
230
●Acceleration is defined as the rate of change ofvelocity of a moving body with time. This changecould be a change in the ___ or its direction ofmotion or both.
speed of the object
231
●An iron ball suspended from a hook by a wire has twoforces acting on it, its weight, acting verticallydownward and the ___ acting on the wirevertically upward.
Tension
232
●The fifth state refers to super cooled solid. Atoms losetheir separate identity and get condensed. Theybehave like a single super atom. This study isbased upon ___ condensation concept developedin 1924.
Bose-Einstein
233
●The ___ is a large complex of RNA and proteinmolecules. They each consist of two subunits, andact as an assembly line where RNA from thenucleus is used to synthesise proteins from aminoacids.
ribosome
234
●The ___ is the transport network for moleculestargeted for certain modifications and specificdestinations, as compared to molecules that willfloat freely in the cytoplasm.
endoplasmicreticulum
235
●The point through which the resultant of the weightsof all the particles of the body acts is called its____.
centre of gravity
236
●The pressure exerted by a liquid on the base of thecontainer depends on the vertical height of theliquid over it not on the area of ____.
cross-section
237
●Metals are generally solids with characteristics suchas hardness, malleability, ductility high ____,luster and ability to conduct heat and electricity.
tensile strength
238
●Centrosomes are composed of two centrioles, whichseparate during cell division and help in theformation of the ____.
mitotic spindle
239
●_____ gave the idea of using names for species and heused a pattern where there were two words usedin each name: a noun as a genus name andgenerally an adjective as a species name.
Linnaeus
240
●____ which is found abundantly in stems of plantslike hemp, jute and coconut, basically providesmechanical support to the plant by giving rigidity,flexibility and elasticity to the plant body.
Sclerenchyma
241
●Blood consists of fluid called plasma, which has redblood corpuscles (RBC), white blood corpuscles(WBC) and blood ____.
platelets
242
●The human skull shapes the head and face, protectsthe brain, and houses and protects special senseorgans for taste, smell, hearing, vision, andbalance. It is constructed from ____ bones.
22
243
●The ribs are curved, flat bones with a slightly twistedshaft. The ____ pairs of ribs form a ribcage thatprotects the heart, lungs, major blood vessels,stomach, liver, etc.
12
244
"●Acquired Immuno Deficiency Syndrome"" which isthe medical expansion for AIDS was first detectedin June 1981 in USA. The disease is caused by a____- HIV (human immuno deficiency virus)."
retrovirus
245
●Synthetic ____ are sodium salts of long chain benzenesulphonic acids or sodium salts of long chain alkylhydrogen sulphates.
Detergents
246
●Petroleum is a mixture of a very large number ofdifferent hydrocarbons; the most commonly foundmolecules are alkanes (linear or branched),cycloalkanes, aromatic hydrocarbons, or morecomplicated chemicals like ____.
Asphaltenes
247
●In ____ motion the particle moves from one point inspace to another which may be along a straightline or along a curved path.
translator
248
●____ is the shortest distance covered by a movingobject from the point of reference (initial positionof the body), in a specified direction and so is avector quantity.
Displacement
249
●A body is said to be moving with ____velocity if itcovers unequal distances in equal intervals of timeand vice-versa in a specified direction or if itchanges the direction of motion.
Variable
250
●____ is that physical quantity which changes or tendsto change a body's state of rest or of uniformmotion in a straight line.
Force
251
●____ deals with the study of cellular constituents likeproteins, carbohydrates, lipids, and nucleic acidsas also the chemical processes that occur in cells.
Biochemistry
252
●All ____ metals have one valence electron in theiratom and so, their chemical properties are similar.
alkali
253
●The simplest version of a carbohydrate is a ____which possesses the properties of carbon,hydrogen, and oxygen in a 1:2:1 ratio.
monosaccharide
254
●Vitamins are nutrients required in small amounts foressential metabolic reactions in the body whichare broken down in nutrition as either ____soluble (Vitamin C) or fat soluble (Vitamin E).
water
255
●Water-soluble vitamins dissolve easily in water, andin general, are readily excreted from the body, tothe degree that ____ output is a strong predictorof vitamin consumption.
Urinary
256
●____ is a 32-amino acid linear polypeptide hormonethat is produced in humans primarily by theparafollicular cells (also known as C-cells) of thethyroid, and in many other animals in theultimobranchial body.
Calcitonin
257
●RNA polymerase (RNAP or RNApol) is an enzymethat produces RNA. In cells, RNAP is needed forconstructing RNA chains from DNA genes astemplates, a process called ____.
Transcription
258
●Historically, vitamin ____ was discovered from itsrelationship to the disease pernicious anemia,which is an autoimmune disease that destroysparietal cells in the stomach that secrete intrinsicfactor.
B12
259
●____ Test is a sensitive chemical test for the presenceof carbohydrates, based on the dehydration of thecarbohydrate by sulfuric acid to produce analdehyde.
Molisch's
260
●The ____ effect is the apparent change in thefrequency of a wave motion when there is relativemotion between the source of the waves and theobserver.
Doppler
261
●____ rays have the least penetrating power, move at aslower velocity than the other types, and aredeflected slightly by a magnetic field in a directionthat indicates a positive charge.
Alpha
262
●In humans there are 13 vitamins: 4 fat-soluble(____and K) and 9 water-soluble (8 B vitaminsand vitamin C).
A, D, E
263
●Malaria is a mosquito-borne infectious disease causedby a eukaryotic protist of the genus ____.
Plasmodium
264
●Thiamine is found in a wide variety of foods at lowconcentrations with ____ and pork being the mosthighly concentrated sources of thiamine.
Yeast
265
●Amino acids are molecules containing an ____ group,a carboxylic acid group and a side chain thatvaries between different amino acids.
Amine
266
●Pure water is ___, and can be considered either avery weak acid or a very weak base (center on thepH scale), giving it a pH of 7, or 0.0000001 M H+.
neutral
267
●Esterification is a reversible reaction, with hydrolysis
"literally ""water splitting"" involves addingwater and a catalyst (commonly NaOH) to anester to get the sodium salt of the carboxylic acidand ____. Alcohol"
268
●____ is a common solvent, able to dissolve paints,paint thinners, silicone sealants, many chemicalreactants, rubber, printing ink, adhesives (glues),lacquers, leather anners, and disinfectants.
Toluene
269
●____ Law states that for a parallel beam ofmonochromatic radiation passing throughhomogeneous solutions of equal concentration theabsorbance is proportional to the path length.
Lambert's
270
●The transfer of energy from one chemical substanceto another depends on the size of energy ___emitted from one substance.
Quanta
271
●The existence of characteristic energy levels fordifferent chemical substances is useful for theiridentification by the analysis of ___ lines.
Spectral
272
●In optics, the ___ law relates the absorption of light tothe properties of the material through which thelight is traveling.
Beer-Lambert
273
●Which law in chemistry states that at constantpressure, the volume of a given mass of an idealgas increases or decreases by the same factor as itstemperature (in Kelvin) increases or decreases?
Charles's Law
274
●The internal electronic energy changes of an atom areconnected to the frequency of the correspondingemitted radiation by the formula ∈=h.ν, with hthe ____constant.
Planck
275
non-disjunct sperm 22A+XY or a non-disjunct ovum22A+XX with normal sperm ____.
22A+Y
276
●Turners Syndrome results from the fusion of an ovum22A + X with an sperm with 22A, as a result ofwhich, the genetic composition is ____. It developsinto a female individual with rudimentary ovaries.
44+ X0
277
●____ is a condition, which represents a change inchromosome number. Such a change is mostcommonly caused in the reproductive cells duringthe process of Gametogenesis.
Aneuploidy
278
●____ (PKU) is a common metabolic disorder ingrowing children. A child suffering from PKU hasdefective legs and is usually unable to stand. Sucha child may also be mentally retarded.
PhenylKetonuria
279
●Superconductivity was discovered in 1911 by ___,who was studying the resistance of solid mercuryat cryogenic temperatures using the recently-discovered liquid helium as a refrigerant.
HeikeKamerlingh Onnes
280
●The minimum amount of the fissionable substancerequired so as to continue the chain reactionunder a given set of conditions is called ___.
critical mass
281
●____ observed that white light is split into sevencolors and that the seven colors resemble thecolors of a rainbow namely violet, indigo, blue,green, yellow, orange and red (VIBGYOR).
SirIsaac Newton
282
●Conventionally, the electric current is said to flowfrom a higher potential to a lower potential whilethe ____ flow from a lower potential to a higherpotential i.e., the electric current flows in adirection opposite to the flow of electrons.
electrons
283
●German physicist, ____ showed that the flow of anelectric current through a wire depended on its'resistance' and the potential difference betweenits ends.
Georg Ohm
284
●____ is defined as the distance covered by a movingobject in a particular direction in unit time orspeed in a particular direction.
Velocity
285
●If an object moving with an initial velocity 'u' attaina final velocity 'v' in time 't', then acceleration 'a'produced in the object is Acceleration = ____ withtime.
Rate of change of velocity
286
●When an object moves through a fluid, there will befriction due to the resistance of the materialmedium which ____ with the velocity of the bodyas in the case of a rocket and aeroplane.
increases
287
●Newton observed all material bodies' exhibit inabilityto change by themselves, their state of rest or ofuniform motion in a straight line. This property iscalled ____.
inertia
288
●Law of Conservation of ____ states that if no externalforce acts on a system in a particular directionthen the total momentum of the system in thedirection remains unchanged.
Momentum
289
●Solubility is defined as the number of grams of asolute that dissolves in ____ of a solvent to form asaturated solution at a given temperature andpressure.
100g
290
●The total number of protons and neutrons present inone atom of an element is known as its ____number.
mass
291
●If there are two objects of masses m1 and m2separated by a distance d, the force actingbetween them is given by F=Gm1m2/d2, where Gis a constant of proportionality called theuniversal ____.
gravitational constant
292
●Kelvin Scale of Temperature was devised by LordKelvin (1824-1907); in this scale of temperature,zero of the scale corresponds to ____ C, which issaid to be the temperature at which the volume ofa gas reduces to zero.
- 2730
293
●If a bottle of perfume is opened in one corner of aroom, it spreads in the whole room by ____.
diffusion
294
●A ____ wave is a disturbance, which does not requireany material medium for its propagation and cantravel even through vacuum.
electromagnetic
295
●Light is electromagnetic radiation, particularlyradiation of a wavelength that is visible to thehuman eye (about 400-700 nm, or perhaps ____).
380-750 nm
296
●____ can be reduced by increasing area over whichthe thrust is exerted; this same principle explainswhy rear wheels of buses and trucks are usuallydouble.
Pressure
297
●As one goes deeper in the swimming pool, thepressure on the ____ is found to ear drum
Torricellian
298
●Red, green and blue are called primary colors or ____primary colors because white is obtained whenthese colors are mixed.
additive
299
●When two or three primary colors are mixed indefinite ratio we get new colors. That is, Red +Blue = Magenta; Blue + Green = Cyan (____);Red + Green = Yellow; Red + Green + Blue =White.
Peacock blue
300
●Colour deficiency is that defect of the eye due towhich a person is not able to distinguish betweencertain colors mainly due to the malfunctioning orabsence of a particular ____.
Cone
301
"●The current passing through a conductor for aparticular voltage depends on the property of theconductor called ""resistance"" which is measuredin ____."
ohms
302
●Electrons in different metals can have differentenergies; if two of these metals are placed in aconducting liquid (____) a difference in electricalpotential is set up between them.
electrolyte
303
●____ is based on the principle that materials withopposite electrical charges attract one another andthat some materials conduct electricity betterafter exposure to light.
Dry copying
304
●____ are a type of unsaturated fat with trans-isomerbonds; these are rare in nature and in foods fromnatural sources; they are typically created in anindustrial process called (partial) hydrogenation.
Trans fats
305
●When a charged body is brought near a conductor,the nearer end is induced with an opposite chargeand a similar charge is induced on the fartherend; this phenomenon is called ____.
electrostatic induction
306
●The projectile moves forward due to the horizontalforce and downwards due to the force of gravity;the projectile follows a ____ since both the forcesact simultaneously on it.
curved
307
●A body weighs more at the poles than at the equatorand a body's weight will become ____ at the centreof the Earth as acceleration due to gravity is zeroat the centre of the Earth.
zero
308
●Saturated fats have all of the carbon atoms in theirfatty acid chains bonded to hydrogen atoms,whereas unsaturated fats have some of thesecarbon atoms ____-bonded.
double
309
●The amount of matter contained in a body does notchange with time or from place to place i.e., ____of a body remains the same throughout theuniverse.
mass
