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KVPY Exam Pattern, KVPY Questions with Answers Page 11

(#M40027229) KVPY QUESTION Physical Ability Test Keep an EYE

E.coli about to replicate was pulsed with tritiated thymidine for 5 min and then transferred to normal medium. After one cell division which one of the following observations would be correct ?
(A) both the strands of DNA will be radioactive (B) one strand of DNA will be radioactive
(C) none of the strands will be radioactive (D) half of one strand of DNA will be radioactive

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(#M40027228) KVPY QUESTION Physical Ability Test Keep an EYE

Although blood flows through large arteries at high pressure, when the blood reaches small capillaries the
pressure decreases because-
(A) the valves in the arteries regulate the rate of blood flow into the capillaries
(B) the volume of blood in the capillaries is much lesser than that in the arteries
(C) the total cross-sectional area of capillaries arising from an artery is much greater than that of the artery
(D) elastin fibers in the capillaries help to reduce the arterial pressure

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(#M40027227) KVPY QUESTION Physical Ability Test Keep an EYE

Rodents can distinguish between many different types of odours. The basis for odour discrimination is that-
(A) they have a small number of odorant receptors that bind to many different odorant molecules
(B) the mechanoreceptors in the nasal cavity are activated by different odorant molecules found in the air
passing through the nostrils
(C) the part of the brain that processes the sense of smell has many different receptors for odorant molecules
(D) a large number of different chemoreceptors are present in the nasal cavity that binds a variety of odorant
molecules

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(#M40027226) KVPY QUESTION Physical Ability Test Keep an EYE

Rice has a diploid genome with 2n = 24. If crossing-over is stopped in a rice plant and then selfed seeds are
collected, will all the offsprings be genetically identical to the parent plant ?
(A) yes, because crossing-over is the only source of genetic variation
(B) no, because stopping of crossing-over automatically increases rate of point mutation
(C) yes, only if the parent plant was a completely inbred line
(D) yes, only if the parent plant was a hybrid between two pure-bred lines

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(#M40027225) KVPY QUESTION Physical Ability Test Keep an EYE

Which sequence of events gives rise to flaccid guard cells and stomatal closure at night ?
(A) low [Glucose] ⇒ low osmotic pressure ⇒ low pH ⇒ high pCO2
(B) low pH ⇒ high pCO2 ⇒ low [Glucose] ⇒ low osmotic pressure
(C) low osmotic pressure ⇒ high pCO2 ⇒ low pH ⇒ low [Glucose]
(D) high pCO2 ⇒ low pH ⇒ low [Glucose] ⇒ low osmotic pressure

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(#M40027224) KVPY QUESTION Physical Ability Test Keep an EYE

The crystal field stabilization energies (CFSE) of high spin and low spin d^6 metal complexes in terms of Δ0,
respectively, are-
(A) –0.4 and –2.4 (B) –2.4 and –0.4 (C) –0.4 and 0.0 (D) –2.4 and 0.0

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(#M40027223) KVPY QUESTION Physical Ability Test Keep an EYE

At 300 K the vapour pressure of two pure liquids, A and B are 100 and 500 mm Hg, respectively. If in a
mixture of A and B, the vapour pressure is 300 mm Hg, the mole fractions of A in the liquid and in the
vapour phase, respectively, are-
(A) 1/2 and 1/10 (B) 1/4 and 1/6 (C) 1/4 and 1/10 (D) 1/2 and 1/6

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(#M40027222) KVPY QUESTION Physical Ability Test Keep an EYE

The electron in hydrogen atom is in the first Bohr orbit (n = 1). The ratio of transition energies, E(n = 1 → n
= 3) to E(n = 1 → n = 2), is-
(A) 32/27 (B) 16/27 (C) 32/9 (D) 8/9

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(#M40027221) KVPY QUESTION Physical Ability Test Keep an EYE

If EºFe2+ / Fe = –0.440 V and Fe3+ / Fe2+ Eº = 0.770 V, then EºFe3+ / Fe is-
(A) 0.330 V (B) –0.037 V (C) –0.330 V (D) –1.210 V

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(#M40027220) KVPY QUESTION Physical Ability Test Keep an EYE

MnO4
– oxidizes (i) oxalate ion in acidic medium at 333 K and and (ii) HCl. For balanced chemical
equations, the ratios [MnO4
– : C2O4
2–] in (i) and [MnO4
– : HCl] in (ii), respectively, are-
(A) 1 : 5 and 2 : 5 (B) 2 : 5 and 1 : 8 (C) 2 : 5 and 1 : 5 (D) 5 : 2 and 1 : 8

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