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Match each item in Column I with one in Column II and select your answer from the codes given:
 Column I                                       Column II
 Scientist                                     Contribution
A. Francis Crick              a. Breaking the genetic code
B. Nirenberg                  b. Established Coenorhabditis elegans as a model genetics                                               study organism
C. Benzer                      c. Central dogma of molecular biology
D. Brenner                    d. Bacteriophage genetics
     A   B   C   D
1.  c    a   d    b
2.  c    a   b    d
3.  a    b   c    d
4.  a    c   d    b

Identify the incorrect statement regarding experiments on Pisum sativum by Gregor Mendel?
(1) He conducted hybridisation experiments on garden peas for seven years (1856-1863) and proposed the laws of inheritance in living organisms.
(2) It was for the first time that statistical analysis and mathematical logic were applied to problems in biology.
(3) Unfortunately his experiments had a small sampling size, which gave less credibility to the data that he collected.
(4) He investigated characters in the garden pea plant that were manifested as two opposing traits.

The law of Segregation is based on the fact that
(1) The alleles do not show any blending
(2) There is random fertilization
(3) Gametes are pure for the trait
(4) The zygotes are diploid

The ultimate source of allelic variation is:
(1) Recombination
(2) Natural selection
(3) Mutation
(4) Drift

In the case of co-dominance, the F₁ qeneration resembles
(1) Dominant parent
(2) Recessive parent
(3) Both the parents
(4) None of the parents

What can the possible blood qroups of progeny whose father and mother are of A and B blood group respectively?
(1) A and B only
(2) AB only
(3) All except O
(4) A, B, AB and O

In case of starch synthesis in pea seeds [controlled by B gene], BB homozygotes produce large and round starch grains; bb homozygotes produce smaller and wrinkled starch grains and Heterozygotes produce round seeds of intermediate size What can be inferred from this observation?
(1) The gene B mutates at a faster rate
(2) The gene B is easily influenced by the environment
(3) Dominance is not an autonomous feature of a gene or the product that it has  information for.
(4) Some genes do not follow the law of segregation.

When two pairs of traits are combined in a hybrid, segregation of one pair of characters is independent of the other pair of characters? This is the statement of
(1) Law of Dominance
(2) Law of segregation
(3) Law of Independent Assortment
(4) Law of Linkage

What defines a coding and a template strand in the transcription unit?
(1) Structural gene
(2) Ori
(3) Terminator
(4) Promoter

Identify the incorrectly matched pair:
      Organism                             Length of DNA
1. Bacteriophage $\mathrm{\varphi }$ 174             5386 base pairs
2. Bacteriophage Lambda          48502 base pairs
3. Eschrechia coli                      $4\times {10}^6$ base pairs
4. Human beings                      $3.3\times {10}^9$ base pairs

Which has strongest electrovalent bond?
1. LiCl
2. NaCl
3. RbCl
4. CsCl

HF is liquid while HCl, HBr and HI are gases because of
1. Structure of HF
2. Hybridization of Fluorine in HF
3. Formation of Hydrogen Bonding
4. Presence of Intermolecular Hydrogen Bonding in HF

Which has highest lattice energy?
1. LiCl
2. MgO
3. Li₂O
4. LiF

Down the 1^st & 2^nd Groups, solubility of compoundn decreases because:
1. Hydration energy & lattice energy both decrease
2. Hydration energy decreases sharply while lattice energy decreases slowly
3. Hydration energy & lattice energy both increase
4. None of the above is the right reason

Hybridization for the carbon that is circled is:

1. sp
2. sp²
3. sp³
4. dsp²

A black hole is an object whose gravitational field is so strong that even light cannot escape from it. To what approximate radius would earth (mass: $6\times {10}^{24}<mspace\; width="1em"></mspace>\mathrm{kg}$) have to be compressed to be a black hole?
1. ${10}^{-9}<mspace\; width="1em"></mspace>\mathrm{m}$
2. ${10}^{-6}<mspace\; width="1em"></mspace>\mathrm{m}$
3. ${10}^{-2}<mspace\; width="1em"></mspace>\mathrm{m}$
4. $100<mspace\; width="1em"></mspace>\mathrm{m}$

A body attains a height equal to the radius of the earth, the velocity of the body with which it was projected is
1. $\sqrt{\frac{\mathrm{GM}}{\mathrm{R}}}$
2. $\sqrt{\frac{2\mathrm{GM}}{\mathrm{R}}}$
3. $\sqrt{\frac{5\mathrm{GM}}{\mathrm{R}}}$
4. $\sqrt{\frac{3\mathrm{GM}}{\mathrm{R}}}$

By what percent kinetic energy of a satellite should be increased so that it can leave its orbit and move to infinity
1. 100%
2. 200%
3. 41.4%
4. 69%

At what height above the earth's surface the force experienced by a particle reduces to 1% of its value on earth's surface. (where R is radius of earth)
1. $\frac{\mathrm{R}}{200}$
2. $\frac{\mathrm{R}}{50}$
3. $4<mspace\; width="1em"></mspace>\mathrm{R}$
4. $9<mspace\; width="1em"></mspace>\mathrm{R}$

Imagine a new planet having the same density as that of the earth but it is 3 times bigger (can be assumed to be radius or diameter) than the earth in size. If the acceleration due to gravity on the surface of the earth is 'g' and that on the surface of the new planet is g' then
1. $\mathrm{g}\text{'}=3\mathrm{g}$
2. $\mathrm{g}\text{'}=\frac{\mathrm{g}}{9}$
3. $\mathrm{g}\text{'}=9\mathrm{g}$
4. $\mathrm{g}\text{'}=27\mathrm{g}$