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# NEET Mock Test - 4 (12-02-2020)

## 180 Questions MCQ Test NEET Mock Test Series 2020 & Past Year Papers | NEET Mock Test - 4 (12-02-2020)

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This mock test of NEET Mock Test - 4 (12-02-2020) for NEET helps you for every NEET entrance exam. This contains 180 Multiple Choice Questions for NEET NEET Mock Test - 4 (12-02-2020) (mcq) to study with solutions a complete question bank. The solved questions answers in this NEET Mock Test - 4 (12-02-2020) quiz give you a good mix of easy questions and tough questions. NEET students definitely take this NEET Mock Test - 4 (12-02-2020) exercise for a better result in the exam. You can find other NEET Mock Test - 4 (12-02-2020) extra questions, long questions & short questions for NEET on EduRev as well by searching above.
QUESTION: 1

Solution:

QUESTION: 2

Solution:

QUESTION: 3

### For a glass prism of refractive index the angle of minimum deviation is equal to the angle of prism, then angle of prism is

Solution:

QUESTION: 4

There is a small object at centre C of a solid glass sphere of refractive index μ. When seen from outside, the dot will appear to be located

Solution:

QUESTION: 5

A lens behaves as a converging lens in air and a diverging lens in water. The refractive index of the material is

Solution:

QUESTION: 6

A quartz slab is placed inside glycerine as shown in the figure. The shift of object observed by observer on left side is :

Solution:

QUESTION: 7

The largest distance of the image of a real object from a convex mirror of focal length 20 cm can be

Solution:

As x0 increases, v increases
⇒ vmax occurs when x0 = infinity
⇒ vmax = 20 cm

QUESTION: 8

A hypermetropic person can see the objects beyond 1 m from his eyes. What should be the power of spectacles we should use so that his least distance of clear vision becomes 25 cm

Solution:

QUESTION: 9

A simple microscope has a focal length of 2.5 cm. Maximum angular magnification of it will be (Given that least distance of clear vision = D = 25 cm)

Solution:

QUESTION: 10

A normal human eye can see from 25 cm to infinity. If the distance between eye lens and retina is 2 cm, then which of the following is correct?

Solution:

QUESTION: 11

In a compound microscope, the intermediate image is

Solution:
QUESTION: 12

Stopping potential in photoelectric experiment for a given metal surface

Solution:
QUESTION: 13

When a transistor is used in common emitter mode as an amplifier

Solution:
QUESTION: 14

The output of a NAND gate is 0, when

Solution:
QUESTION: 15

Q. The resistance of a germanium junction diode whose V−I is shown in the figure is (Vk=0.3V)

Solution:

QUESTION: 16

In the circuit shown, I1 and I2 are respectively

Solution:

Both the diodes are forward biased and hence will behave like short circuit. So, no current will flow through 14 kΩ and 12 kΩ resistances.

QUESTION: 17

Input applied to the following circuit will produce which of the following output signal, assuming R1 = R2 and  diode is ideal.

Solution:

If Vin = Positive, then diode will be reverse biased, hence no output.
If Vin = Negative, then diode will be forward biased, hence potential difference across R2 will be 2.5V.

QUESTION: 18

If the ratio of amplitudes of two coherent sources producing an interference pattern is 3 : 4, then ratio of intensities at maxima and minima is

Solution:

QUESTION: 19

The ionization potential of hydrogen atom is − 13.6 V. Photons of energy 12.75 eV are made to incident on sample of H atoms at ground state. How many spectral lines are expected in emitted radiation?

Solution:

E= -13.6, E= -3.4, E=- 1.5, E= -0.85; So electron can go upto 4th orbit from ground state. Total no. of ways by which this is possible = 6.

QUESTION: 20

Electromagnetic radiations of intensity I is incident normally on a perfectly reflecting surface. If speed of light is C, then radiation pressure exerted on the surface is

Solution:

Let no. of photons falling per second per unit area = n
So, I = nhf
Pressure = Force/Area = 2n(h/λ) = 2nhf/c = 2I/c

QUESTION: 21

A beam of unpolarised light travelling in air is reflected from a solid surface at an angle of reflection 60°. If the reflected light is plane polarized, then refractive index of the solid is

Solution:

Using brewster’s law, μ=tan (i) = tan 60°

QUESTION: 22

de-Brogile wavelength associated with a proton accelerated from rest by 10 kV is λ. The de-Brogile wavelength associated with a 10 keV neutron is

Solution:

where k is kinetic energy of particle. According to given data, kinetic energy of proton is 10keV which is same as that of neutron. Masses are also same.

QUESTION: 23

Momentum of an alpha particle emitted from a stationary nucleus is. Momentum of the daughter nucleus should be

Solution:

Apply momentum conservation principle.

QUESTION: 24

Percentage of radioactive sample decayed in 2 half lives is

Solution:

After 2 half lives, N = N0/4, but decayed nuclei = 3 N0/4 = 75%

QUESTION: 25

In a Young’s double-slit experiment, the intensity at a bright fringe is I0. If one of the slits is now covered, the intensity at any point on the screen will be

Solution:

Ibright = 4Islit

QUESTION: 26

In a Young’s double-slit experiment, the central bright fringe can be identified

Solution:
QUESTION: 27

In a Young’s double-slit experiment, if the slits are of unequal width,

Solution:

will not cancel each other if widths are unequal.

QUESTION: 28

In a Young’s double-slit experiment, the fringe width is β. If the entire arrangement is now placed inside a liquid of refractive index μ, the fringe width will become

Solution:
QUESTION: 29

In a Young’s double-slit experiment, let S1 and S2 be the two slits and C be the centre of the screen. If ∠S1CS2 = θ and λ is the wavelength, the fringe width will be

Solution:

Because, d/D = θ & fringe width = Dλ/d

QUESTION: 30

The penetrating powers of α, β and γ radiations, in decreasing order, are

Solution:
QUESTION: 31

In a radioactive series, changes to through n1 α-decay processes and n2 β-decay processes.

Solution:

4 n1 = 238 – 206 = 32, so n1 = 8
2 n1 – n2 =92 – 82 = 10, so n2 = 6

QUESTION: 32

Let u denote one atomic mass unit. One atom of an element of mass number A has mass exactly equal to A u

Solution:
QUESTION: 33

Two nucleons are at a separation of 1 fm. The net force between them is F1 if both are neutrons, F2 if both are protons, and F3 if one is a proton and the other is a neutron.

Solution:

Nuclear forces will be same all three cases but total force F2 will be smaller because of electrostatic repulsion between two protons.

QUESTION: 34

A sample of radioactive material has mass m, decay constant λ, and molecular weight M. Avogadro number = NA. The initial activity of the sample is

Solution:

Activity = λ X No. of nuclei = λ X Moles X NA = λm NA/M

QUESTION: 35

An orbital electron in the ground state of hydrogen has an angular momentum L1, and an orbital electron in the first orbit in the ground state of lithium atom has an angular momentum L2.

Solution:

Bohr’s postulate L = nh/2π, L does not depend on atomic number.

QUESTION: 36

When white light (violet to red) is passed through hydrogen gas at room temperature, absorption lines will be observed in the

Solution:
QUESTION: 37

According to bohr's model, the velocity of an electron orbiting in the nth orbit of hydrogen like atom is proportional to nx where x is

Solution:
QUESTION: 38

A free neutron decays into a proton, an electron and :

Solution:
QUESTION: 39

If the potential difference applied across a Coolidge tube is increased, then

Solution:

Potential difference only affects continuous X-Rays and not characteristic X- Rays.

QUESTION: 40

The half-life of 131I is 8 days. Given a sample of 131I at time t = 0, we can assert that

Solution:
QUESTION: 41

A : Two coherent point sources of light having nonzero phase difference are seperated by small distance. Then on the perpendicular bisector of line segment joining both the point sources, constructive interference cannot be obtained.

R : For two waves from coherent point sources to interfere constructively at a point, their phase difference at that point must be nπ (where n is an integer).

Solution:
QUESTION: 42

A : A point object moves near the principal axis of a fixed spherical mirror along a straight line. Then the image formed by the spherical mirror also moves along a straight line.

R : For an incident ray on a fixed spherical mirror there is a fixed reflected ray. If a point object moves along this incident ray, its image will always lie on the given reflected ray.

Solution:
QUESTION: 43

A : In  Bohr’s atomic model, speed of electron in an orbit is inversely proportional to the radius of the orbit of given principal quantum number.

R : Bohr’s second postulate state that angular momentum of electron in nth

Solution:
QUESTION: 44

A : In N-type silicon, electrons are the majority carriers.
R : N-type semiconductors are doped with trivalent impurities.

Solution:
QUESTION: 45

A : In spontaneous fission, the energy is always released.
R : S pontaneous fission occurs to increase the binding energy per nucleon.

Solution:
QUESTION: 46

Nylon-66 is a polyamide of

Solution:

QUESTION: 47

Arrange the following compounds in the order of leaving group ability

Solution:

Weaker the base, better is the leaving group. Hence, basicities decrease in the order

Therefore, the order of leaving group ability decreases in the reverse order (IV) > (III) > (I) > (II).

QUESTION: 48

An SN2 reaction at asymmetric carbon of a compound always gives

Solution:

In SN2  reaction, inversion of configuration occurs. Since the reactant and the product are not enantiomers, the sign of optical rotation may or may not change, hence single stereoisomer is obtained.

QUESTION: 49

Replacement of ‘Cl’ of chlorobenzene to give phenol requires drastic conditions but chlorine of 2,4-dinitrochloro benzene is readily replaced because

Solution:

NO2 group withdraws electrons from ortho and para positions, hence activates Cl towards nucleophilic substitution reactions

QUESTION: 50

Chlorination of toluene in the presence of light and heat followed by treatment with aqueous NaOH gives

Solution:

QUESTION: 51

Neopentyl alcohol on treatment with HBr gives

Solution:

QUESTION: 52

Which of the following derivatives of benzene would undergo hydrolysis most readily with aq. KOH?

Solution:

– NO2  group increases the reactivity in nucleophilic substitution on benzene ring due to –R and –I effect.

QUESTION: 53

On warming with I2 and aqueous NaOH, iodoform and sodium succinate are formed. The formula of the compound should be

Solution:

CH3COCH2CH2COOH  CHI3 + HOOCCH2CH2COOH and
CH3COCH2CH2COOH3  2CHI3 + HOOCCH2CH2COOH

QUESTION: 54

Which of the following statement is correct?

Solution:

Cl is o, p-directing and hence on further chlorination will give a mixture of o- and p-dichlorobenzene.

QUESTION: 55

An organic compound (A) (MF C4H10O) upon dehydrogenation gives a compound (B) which forms phenyl hydrazone with phenylhydrazine and both the compounds (A) and (B) respond to iodoform test. Hence, the compound (A) is

Solution:

QUESTION: 56

Phenol does not react with NaHCO3 because

Solution:

Carbonic acid is stronger than phenol.

QUESTION: 57

Solution:

QUESTION: 58

HBr reacts fastest with

Solution:

As more stable carbonium ion is formed.

QUESTION: 59

The strongest acid among the following aromatic compounds is

Solution:

Nitro is strongly electron withdrawing group. At ortho position intramolecular hydrogen bond reduces the acidic strength.

QUESTION: 60

Glycerol on heating with concentration H2SO4 gives

Solution:
QUESTION: 61

The A is :

Solution:

The reaction is an esterification:

QUESTION: 62

An amide (A) C3H7NO on hydrolysis gives an amine (B) and an acid (C). B gives carbylamines reaction where as C reduces Tollen’s reagent. (A) is

Solution:

and acid (C) reduces. Tollens reagent, (C) is a formic acid. (B) gives carbylamines reaction therefore B is a primary amine with two carbon atoms. (B) is ethyl amine.

QUESTION: 63

Which of the following is an example of basic dye?

Solution:

QUESTION: 64

The major product obtained when Br2/Fe is reacted with

Solution:

NH group is an activating  group and determines the position of incoming electrophile. The NH group is O, Pdirecting but orthoposition is blocked So Br comes at para w.r.t. to NH.

QUESTION: 65

Identify ‘Y’ in

Solution:

QUESTION: 66

In a Cannizzaro’s reaction, the intermediate that will be the best hydride donor is

Solution:
QUESTION: 67

The appropriate reagent for the transformation is

Solution:

Both Zn(Hg)/HCl and NH2–NH2/OH can reduce COCH3 group to  CH2–CH3 but HCl will also bring about replacement of OH group by Cl. Therefore, the most appropriate reagent is NH2 – NH2/OH

QUESTION: 68

Identify the product (c) in the series

Solution:

CH3CH2NH+ HO - N = O → CH3 - CH2OH + N2 + H2O
CH3CH2OH CH3COOH

QUESTION: 69

In the reaction CH3 - CH = CH - CHO  CH3 - CH = CH - COOH, the oxidizing agent can be

Solution:

CH3 - CH = CH - CHO  CH3 - CH = CH - COOH,
Benedict solution (solution of CuSO4, sodium carbonate and sodium citrate) is specific for oxidation of aldehydes.

QUESTION: 70

Which of the following statements about benzaldehyde is true?

Solution:

Benzaldehyde reduces Tollen’s reagent and undergoes Cannizzaro reaction. However, it forms an addition compound with NaHSO3 but does not undergo aldol condensation.

QUESTION: 71

Benzophenone (C6H5COC6H5) does not react with

Solution:

Due to the electron donating nature of the two phenyl groups, the +ve charge on the C – atom of the CO group is diminished to such as extent that weak nucleophiles such as HCN, NaHSO3 and CH3OH do not react with benzophenone. Therefore, only NH2OH reacts.

QUESTION: 72

C7H7Cl on reaction with KMnO4 followed by the action of soda lime gives only chlorobenzene. The compound C7H7Cl is

Solution:
QUESTION: 73

The correct order of increasing boiling point of the following compound is

Solution:

II < III < IV due to higher mol. wt. and (I) has got highest boiling point because of the presence of H- bonding.

QUESTION: 74

When propanoic acid is treated with aqueous sodium bicarbonate, CO2 is liberated. The ‘C’ of CO2 comes from

Solution:

Thus, carbon atom of CO2 comes from bicarbonate

QUESTION: 75

Which of the following acids has the smallest dissociation constant?

Solution:

Br–CH2–CH2–COOH is the weakest acid since Br has lower –I effect as compared to F and is also far away from –CO2H group.

QUESTION: 76

The molecular weight of benzoic acid in benzene as determined by depression in freezing point method corresponds to

Solution:

In benzene, benzoic acid undergoes dimerisation and hence the molecular weight of benzoic acid as determined by depression in freezing point method is twice the actual molecular weight.

QUESTION: 77

R–CH2–CH2–OH can be converted into R–CH2–CH2–COOH. The correct sequence of reagents is

Solution:

QUESTION: 78

Among the following bromides given below, the order of their reactivity in the SN1 reaction is

Solution:
QUESTION: 79

The product (B) formed in the above reaction is

Solution:
QUESTION: 80

Benzoylchlroide is prepared from benzoic acid by

Solution:
QUESTION: 81

Which of the following statements are true about HCOOH?

Solution:

It is stronger acid than CH3COOH and it reduces tollen’s reagent.

QUESTION: 82

Solution:
QUESTION: 83

The end product of the following reaction would be

Solution:
QUESTION: 84

The order of reactivity of the following esters towards hydrolysis is

Solution:
QUESTION: 85

Which of the following is not a chromophore?

Solution:

Chromophore is colour bearing group

QUESTION: 86

In the following questions a statement of Assertion (A) is followed by a statement of Reason (R).

A : Gabriel-phthalimide synthesis is used to prepare only primary amines.
R : The  reaction involves neuleophilic substitution reaction.

Solution:
QUESTION: 87

A : Hinsberg test is used to distinguish 1°, 2° and 3° amines.
R : H insberg test is based on solubility of sulfonates in KOH.

Solution:
QUESTION: 88

A : 6-oxoheptanal on treatment with dilute NaOH gives 1-cetylcyclopentene.
R : In intramolecular aldol condensation, the Carbanion should be formed from α-carbon of ketone and it attacks on aldehydic carbon to form finally α-β unsaturated carbonyl compound.

Solution:
QUESTION: 89

A : The order of reactivity of different haloalkanes towards β-elimination is 3° > 2° > 1°.
R : 3° alkyl halides yield more substituted alkene, which being more stable are formed at faster rate.

Solution:
QUESTION: 90

A : Reimer-Tiemann reaction is an example of electrophilic substitution where the electrophile is dichloromethylene.
R : Dichloromethylene is electron deficient and is formed by the reaction between chloroform and alkali.

Solution:
QUESTION: 91

Match the following list of bioactive substances and their roles :

Choose the correct match:

Solution:
QUESTION: 92

What would happen if oxygen availability to activated sludge flocs is reduced ?

Solution:
QUESTION: 93

Match the items in Column ‘A’ and Column ‘B’ and choose correct answer :

Solution:
QUESTION: 94

Mycorrhiza does not help the host plant in:

Solution:
QUESTION: 95

Biological Pest Control methods are more preferably used because-

Solution:
QUESTION: 96

Stage of temporary suspension of development under unfavorable condition is known as-

Solution:
QUESTION: 97

Mark the correct statement w.r.t. to declining population-

(i) The graph is urn shaped
(ii) Such population shows positive growth
(iii) It has a small no of pre-reproductive and reproductive population
(iv) It represents young population

Solution:
QUESTION: 98

The interaction between two living organism of different species where one remains unaffected and the other get harmed is-

Solution:
QUESTION: 99

The VerhulstPaul logistic growth is expressed as  what does 'r' represents-

Solution:
QUESTION: 100

A. Experimental removal of Pisaster resulted in extinction of more than ten species of invertebrates in that area.
B. Cactus population in Australia decreased tremendously by introduction of Moths.
C. Predators help to maintain species diversity.

Solution:
QUESTION: 101

Find the incorrect statement/s-

Solution:
QUESTION: 102

In India we have many deserts, forests, hill areas, rivers, lakes and ponds. This statement indicates about-

Solution:
QUESTION: 103

David Tillmann’s experiments show that-

Solution:
QUESTION: 104

If parasitism is an examples of +ve, – ve interaction then competition is an example of-

Solution:
QUESTION: 105

The magnitude of 'r' for human population in India, during 1981 was-

Solution:
QUESTION: 106

The total changes taking place in a completely barren area are collectivity referred as-

Solution:
QUESTION: 107

Study the organisms- Man, Lion, Birds, Fishes, Wolf, Zooplanktons, Grasshopper, Cow, Phytoplanktons, Grasses, Trees.

Q. How many organisms present in the above box are secondary consumer?

Solution:
QUESTION: 108

The rate of decomposition of detritus is accelerated-

Solution:
QUESTION: 109

Which one of the following shows pyramid of numbers in a single tree ecosystem?

Solution:
QUESTION: 110

Biomass present at a trophic level in an area at any time is called-

Solution:
QUESTION: 111

Which one of the following has the lowest number of species in nature-

Solution:
QUESTION: 112

Montreal Protocol was passed in-

Solution:
QUESTION: 113

Match the following

Solution:
QUESTION: 114

Government of India has introduced a concept to work closely with local communities for protection and management of forest. It is known as.

Solution:
QUESTION: 115

'Ecosan' toilets are working in many areas of

Solution:
QUESTION: 116

A. CFC is the most effective greenhouse gases
B. CFC is the most damaging to ozone layer
C. UV - B causes show blindness
D. Ozone is both friend and foe as it is considered good in troposphere and bad in stratosphere

How many of the above statement are correct

Solution:
QUESTION: 117

Which of the following statement is incorrect?

Solution:
QUESTION: 118

How many of the following statements are correct?

1. Primary productivity of an ecosystem depends upon plant species of that area and not on environmental factors
2. During decomposition oxygen is required; the rate is controlled by chemical composition of detritus and climatic factors
3. In aquatic ecosystem GFC is major conduit of energy flow, whereas in terrestrial ecosystem it is DFC.
4. In most ecosystems, all the pyramids are upright.

Solution:
QUESTION: 119

Loss of biodiversity in a region might lead to all except-

Solution:
QUESTION: 120

Out of the following six statements how many of them are correct?

1. Electrostatic precipitator can remove more than 99% of particulate matter
2. According to CPCB particulate size 2.5   or less in diameter are most harmful for human health
3. Catalytic converter reduces emission of poisonous gas
4. Amount of biodegradable inorganic matter in sewage water is estimated by measuring BOD
5. Biomagnification is due to the metabolisation of toxic substance by living organisms
6. Eutrophication is natural aging of lake by nutrient enrichment of its water

Solution:
QUESTION: 121

Polyblend is-

Solution:
QUESTION: 122

Read the following four statements (1 – 4), find out certain mistakes in two of them.

(a) In our stomach lactic acid bacteria play beneficial role by checking growth of disease causing microbes.
(b) Lactic acid bacteria produce acid that coagulates and completely digests the milk protein.
(c) Lactic acid bacteria improves the nutritional quality by increasing the amount of Riboflavin
(d) Lactic acid bacteria require suitable temperature for their multiplication.

Which of the two statements having mistakes?

Solution:
QUESTION: 123

A person who is working as a disc jockey (DJ) might suffer from;

Solution:
QUESTION: 124

Which one of the following pairs is wrongly matched remaining three are correct.

Solution:
QUESTION: 125

Ecosystem requires constant supply of energy to synthesise the molecules they require for;

Solution:
QUESTION: 126

In hydrarch succession pioneer is phytoplankton and climax is forest (mesic). Given below is name of seral stages, arrange them in accordance with their appearance.

A. Submerged free floating plants
B. Reed – swamp stage
D. Submerged plant stage
E. Scrub stage

Solution:
QUESTION: 127

What do you mean by bio-prospecting?

Solution:
QUESTION: 128

In high yielding hybrid crop varieties,to exploit hybrid vigour, the farmers need to purchase fresh hybrid seed every year because :-

Solution:
QUESTION: 129

Choose the correct for decomposition:-

Solution:
QUESTION: 130

For animal breeding-

Solution:
QUESTION: 131

In the following questions a statement of Assertion (A) is followed by a statement of Reason (R).

A: The phase of agriculture between 1960 - 1970 is often called green revolution.
R: There was development of several dwarf varieties of wheat and rice during this phase.

Solution:
QUESTION: 132

A: Bt cotton is a transgenic crop plant.
R: It does not allow the weeds to grow nearly.

Solution:
QUESTION: 133

A: Temporary movement of organism from stressful area to more favorable area in called migration.
R: It has no impact on population of birds and fishes.

Solution:
QUESTION: 134

A: Herbicide resistance crop plants are safer for human use.
R: They do not accumulate the toxic herbicides in fruits and vegetables.

Solution:
QUESTION: 135

A: Green muffler are trees planted along the river side.
R: They are able to absorb sound vibration completely.

Solution:
QUESTION: 136

It is estimated that more than 70 % of the world’s livestock population is in India and China. But the contribution to the farm produce worldwide is only 25 %. Why?

Solution:
QUESTION: 137

Poultry is the class of domesticated fowl used for food or for their eggs. These include

Solution:
QUESTION: 138

Breeding of animals is an important aspect of animal husbandry. Breeding aims at

Solution:
QUESTION: 139

Mark the incorrect statement -

Solution:
QUESTION: 140

Male bull is considered to be superior only if

Solution:
QUESTION: 141

Continued inbreeding reduces fertility and productivity. This is called

Solution:
QUESTION: 142

Read the following statements carefully and mark the correct option-

(1) Inbreeding increases homozygosity
(2) Inbreeding hides harmful recessive genes that are not eliminated by  selection
(3) It helps in accumulation of inferior genes and elimination of useful genes.
(4) Inbreeding is necessary if we want to evolve a pure-line in any animal.

Solution:
QUESTION: 143

How is fertility and yield restored after inbreeding depression?

Solution:
QUESTION: 144

Which method would you employ for animals that are below average in productivity, milk production, and growth rate?

Solution:
QUESTION: 145

Solution:
QUESTION: 146

Mark the correct statement w.r.t. MOET-

Solution:
QUESTION: 147

Arrange in order from the beginning of the event -

(1) The fertilized eggs at 8-32 cell stage are recovered non-surgically and transferred to surrogate mothers.
(2) Cow is administered hormones, with FSH-like activity
(3) The animal is mated with an elite bull or artificially inseminated
(4) They produce 6-8 eggs

Solution:
QUESTION: 148

Mark the correct statement w.r.t. bee keeping-

Solution:
QUESTION: 149

Which of the following has proved helpful in preserving pollen as fossils?

Solution:

Sporopollenin has proved helpful in preserving pollen as fossils. The covering of pollen grain, sporoderm is consist of two layers, viz., exine and intine. Exine is made of a highly resistant fatty substance called sporopollenin.

It could not be degraded by any enzyme. It is not affected by high temperature, strong acid or strong alkali. Thus, it keeps the pollen grains well-preserved as fossils.

Pollenkitt is a yellowish, viscous, sticky and oily layer that covers exine of some insect-pollinated pollen grains. Intine of pollen grains is made up of pectin and cellulose.

QUESTION: 150

Mark the odd one out w.r.t to fishes.

Solution:

Pomfrets are marine fishes.

QUESTION: 151

Observe the diagram carefully and mark the correct explanation for the rop in the figure

Solution:
QUESTION: 152

Eco RI is the restriction enzyme in which R stands for -

Solution:
QUESTION: 153

Which of the following is incorrect statement for restriction enzymes?

Solution:
QUESTION: 154

Which of the following statement is incorrect with respect to polymerase chain reaction?

Solution:
QUESTION: 155

The Ti-plasmid is often used for making transgenic plants. This plasmid is found in

Solution:

Agrobacterium has Ti Plasmid .

QUESTION: 156

Which of the following is a disarmed pathogen vector?

Solution:
QUESTION: 157

Solution:
QUESTION: 158

The illustration below shows maturation of pro-insulin into insulin. Identify X

Solution:

Mature insulin lacks C peptide.

QUESTION: 159

Approximately how many restriction enzymes have been isolated from the different (over 230) strains of bacteria?

Solution:
QUESTION: 160

During gel electrophoresis for separation of DNA fragment

Solution:
QUESTION: 161

After electrophoresis, the separated DNA fragments can be visualized in ethidium bromide gel exposed to UV light. These DNA fragments appear as ……. colored bands

Solution:
QUESTION: 162

After completing the transformation experiments involving the coding sequence of enzyme α-galactosidase, the recombinant colonies should

Solution: See the recombinant colonies are formed due to insertional inactivation of Gal gene(which produces an enzyme.. which converts X gal into simple blue colour compound)now.. when all tranfer cells are cultured on X gal mediumthen the non recombinant tranfer cells with self ligated vector produces blue colour colonies and recombinant cells are white coloniesso. option B is correct.
QUESTION: 163

Which of the following method can be used for making the bacterial cell ‘competent’?

Solution:
QUESTION: 164

RNA interference technique involves -

Solution:
QUESTION: 165

The cutting of DNA by restriction endonuclease results in the fragments of DNA. These fragments are generally separated by a technique known as

Solution:
QUESTION: 166

The technique in which foreign DNA is precipitated on the surface of the tungsten or gold particles and shot into the target cells is known as

Solution:
QUESTION: 167

If we ligate a foreign DNA at the Bam H1 site of tetracycline resistance gene in pBR322 the recombinant plasmid will-

Solution:
QUESTION: 168

Mark the incorrect statement regarding probe?

Solution:

Probe can be single stranded RNA or DNA. Probe does not have complimentarity with mutated gene.

QUESTION: 169

Which of the following transgenic protein product has been used to treat emphysema?

Solution:
QUESTION: 170

‘Rosie’ a transgenic cow is known to produce a type of milk which has all the following characters except

Solution:

Rosie was produced first time in the year 1997.

QUESTION: 171

For isolation of DNA from the liver of goat which of the following enzymes should be used to break open the cell

Solution:

As Goat liver lacks cell wall so does not require lysozyme, cellulase or Chitinase enzymes.

QUESTION: 172

Match the following genes in Column − A with the pests in Column − B

Solution:
QUESTION: 173

Which ingredient is present in high level in genetically modified rice in comparison to the normal rice?

Solution:
QUESTION: 174

What is not true for bioreactors ?

Solution:
QUESTION: 175

Out-breeding is the breeding of the unrelated animals, which may be between individuals of the

Solution:
QUESTION: 176

In the following questions a statement of Assertion (A) is followed by a statement of Reason (R).

A : Bt toxin are protein crystals containing insecticidal protein
R : B  Thuringiensis forms these protein crystals throughout continuously during their growth period.

Solution:

B. thuringienesis forms  protein crystals during a particular phase of their growth.

QUESTION: 177

A : DNA ligase plays important role in recombinant DNA technology.
R : The  linking of antibiotic resistance gene with plasmid vector became possible by enzyme DNA ligase.

Solution:
QUESTION: 178

A : Restriction enzymes belong to a larger class of enzymes called nuclease.
R : Each restriction enzyme recognizes a specific Palindromic nucleotide sequence in the DNA

Solution:

Restriction enzymes remove nucleotides either from the ends (exonucleases) or from within the DNA (endonuclease).

QUESTION: 179

A : RNA interference takes place in all eukaryotic organisms as a method of cellular defence.
R : This method involves ds RNA which prevent transcriptional process.

Solution:
QUESTION: 180

A : Inbreeding increases homozygosity.
R : In bre eding exposes harmful recessive genes that are eliminated by selection.

Solution:

It is a strategy used for developing pure lines.