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Which of the following has ATPase activity?
1. Actin                            2. Tropomyosin
3. Head of myosin             4. Troponin

When we move from dark to light, we fail to see for some time but soon visibility becomes normal. It is:
1. Accommodation
2. Photoperiodism
3. Adaptation
4. Mutation

Which of the following glands secretes the hormone melatonin?
1. anterior pituitary gland
2. melanocytes
3. pineal gland
4. suprachiasmatic nucleus of the hypothalamus

Which of the following regulates carbohydrate, protein and lipid metabolism in a manner opposite to that of insulin?
1. Glucagon
2. Cortisol
3. Epinephrine
4. Norepinephrine

Consider the following features seen in a plant:
I. Male and female reproductive organs are generally found in separate flowers.
II. The male flowers having a number of long filaments terminating in exposed stamens.
III. The female flowers having long, feather-like stigmas.
The flowers of this plant would most likely be pollinated by:
(1) Wind
(2) Water
(3) Bees
(4) Birds

The cleavage divisions in humans is:
1. holoblastic, equal and indeterminate
2. holoblastic, unequal and indeterminate
3. holoblastic, equal and determinate
4. holoblastic, unequal and determinate

Extra embryonic membranes of mammalian embryo are derived from:
1. Inner cell mass
2. Formative cells
3. Trophoblast cells
4. Follicle cells

Which of the following is an abortion pill?
1. DMPA
2. RU486
3. NET-EN
4. Nonoxynol-9

Male pattern baldness is a          trait
(1) sex-linked
(2) sex-limited
(3) sex-influenced
(4) Y-linked

1L of an aqueous solution contains 0.15mole of CH₃COOH (pKa = 4.8) and 0.15 mole of CH₃COONa. After the addition of 0.05 mole of solid NaOH to this solution, the pH will be
(1) 4.5
(2) 4.8
(3) 5.1
(4) 5.4

A nitrogeneous substance X is treated with HNO₂ and the product so formed is further treated with NaOH solution, which produces blue colouration. X can be
1. CH₃CH₂NH₂
2 CH₃CH₂NO₂
3. CH₃CH₂ONO
4 (CH₃)₂CHNO₂

Which of the following sets of quantum numbers is not possible?
1. n = 1, l=0, m=0, s=1/2
2. n = 2, l=0, m=0, s= -1/2
3. n = 3, l= 3, m = -3, s = 1/2
4. n = 3, l= 1, m = 0, s = -1/2

The increasing order of hydrolysis of the following compounds:

(1) (i)<(iii)<(ii)
(2) (ii)<(iii)<(i)
(3) (ii)<(i)<(iii)
(4) (i)<(ii)<(iii)

One molal solution of a carboxylic acid in benzene shows the elevation of boiling point of 1.518 K. The degree of association for dimerisation of the acid in benzene is 
(Kb for benzene = 2.53 K kgmol^-1)
(1) 60%
(2) 70%
(3) 75%
(4) 80 %

A block of mass 2 kg moving with velocity of 10 m/s on a smooth surface hits a spring of force constant $80\times {10}^3$ N/m as shown. The maximum compression in the spring is

1. 5 cm
2. 10 cm
3. 15 cm
4. 20 cm

A particle of mass 10 kg is moving with velocity of $10\sqrt{x}$ m/s, where x is displacement . The work done by net force during the displacement of particle from x = 4 to x = 9 m is 
1. 1250 J
2. 1000 J
3. 3500 J
4. 2500 J

A body starts moving from rest in straight line under a constant power source. Its displacement in time t is proportional to
(1) $t^{1/2}$
(2) t
(3) $t^{3/2}$
(4) $t^2$

An electric dipole is in unstable equilibrium in the uniform electric field. The angle between its dipole moment and the electric field is
1.  90$°$
2.  120$°$
3.  0$°$
4.  180$°$