JIPMER MBBS 2015

The angle between two vectors $a=\hat i-\hat k$ and $b=\hat i-\hat j+\hat k$ is:
1. $\cos^{-1}\frac13$
2. $\cos^{-1}\frac{-1}3$
3. $\sin^{-1}\frac{-1}3$
4. $90^\circ$

The distance x (in $\mu m$) covered by a molecule starting from point A at time t = 0 and stopping at another point B is given by the equation $x=t^2\Big(2-\frac t3\Big).$ The distance between A and B (in $\mu m$) is close to:
1. 10.7
2. 20.7
3. 40.7
4. 50.7

A tangential force acting on the top of a sphere of mass $m$ kept on a rough horizontal plane as shown in the figure.

If the sphere rolls without slipping, then the acceleration with which the centre of the sphere moves is:
1. $\frac{10~F}{7~M}$
2. $\frac{F}{2~M}$
3. $\frac{3~F}{7~M}$
4. $\frac{7~F}{2~M}$

The density of a rod having length $l$ varies as $\rho=c+dx,$ where $x$ is the distance from the left end. The distance from origin to the centre of mass is:

1. $\dfrac{3cl+2Dl^2}{3(2c+Dl)}$
2. $\dfrac{3cl+4Dl^2}{3(2c+Dl)}$
3. $\dfrac{2cl+3Dl^2}{3(2c+1)}$
4. $\dfrac{cl+3Dl^2}{3(2c+Dl)}$

One end of a massless spring of constant 100 N/m and natural length 0.5 m is fixed and the other end is connected to a particle of mass 0.5 kg lying on a frictionless horizontal table. The spring remains horizontal. If the mass is made to rotate at an angular velocity of 2 rad/s, then the elongation of the spring is:

1. 0.1 m
2. 10 cm
3. 1 cm
4. 0.01 cm

A block slides down on an incline of angle 30° with an acceleration $\frac g4.$ Find the kinetic friction coefficient.
1. $\frac{1}{2\sqrt2}$
2. $0.6$
3. $\frac{1}{2\sqrt3}$
4. $\frac{1}{\sqrt2}$

Two long straight wires, each carrying an electric current of 5 A, are kept parallel to each other at a separation of 2.5 cm. Find the magnitude of the magnetic force experiment by 10 cm of a wire.

1. 4.0 × 10^-4 N
2. 3.5 × 10^-6N
3. 2.0 × 10^-5 N
4. 2.0 × 10^-9 N

A wire of resistance 10 Q is bent to form a complete circle. Find its resistance between two diametrically opposite points.

1. $5~\Omega$
2. $2.5~\Omega$
3. $1.25~\Omega$
4. $\frac{10}{3}~\Omega$

Find the resistance of a hollow cylindrical Conductor with the inner and outer radii of length 1.0 mm and 2.0 mm respectively. The resistivity of the material is 2.0 x 10^-8 $\Omega$ m. The length of the conductor is 10 m.

1. 2.1 x 10^-3 $\Omega$
2. 1.3 x 10^-4 $\Omega$
3. 3.2 x 10^-4$\Omega$
4. 4.6 x 10^-2$\Omega$

10.

Three equal charges, each having a magnitude of 2.0 × 10^-6 C, are placed at the three corners of a right-angled triangle of sides 3 cm, 4 cm and 5 cm. The force (in magnitude) on the charge at the right-angled corner is:

1. 50 N
2. 26 N
3. 29 N
4. 45.9 N

11.

A diatomic gas ($\gamma=1.4$) does $200~\mathrm{J}$ of work when it is expanded isobarically. The heat given to the gas in the process is:
1. $ 500 \mathrm{~J} $
2. $ 700 \mathrm{~J}$

3. $ 600 \mathrm{~J}$
4. $ 900 \mathrm{~J} $

12.

A uniform ring of mass $m$ and radius a is placed directly above a uniform sphere of mass m and of equal to radius. The centre of the ring is at a distance $\sqrt3a$ from the centre of the sphere. The gravitational force (F) exerted by the sphere on the ring is:
1. $\frac{3G~Mm}{8a^2}$
2. $\frac{2G~Mm}{3a^2}$
3. $\frac{7G~Mm}{\sqrt2a^2}$
4. $\frac{3G~Mm}{a^2}$

13.

A projectile is fired with a velocity $u$ at angle $\theta$ with the ground surface. During the motion at any time, it is making an angle $\alpha$ with the ground surface. The speed of the particle at this time will be:
1. $u\cos\theta~\sec\alpha$
2. $u\cos\theta.\tan\alpha$
3. $u^2\cos^2\theta.\sin\alpha$
4. $u\sin\theta.\sin\alpha$

14.

The earth receives solar radiation at a rate of $8.2 \mathrm{~J} \mathrm{~cm}^2-\mathrm{min}$. If the sun radiates as the black bodies, the temperature at the surface of the sun will be: (the angle subtended by the sun on the earth is supposed $0.53^\circ$ and Stefan constant is $\sigma=5.67 \times 10^{-8} \mathrm{~Wm}^2-\mathrm{K}^4$)
1. $ 5800 \mathrm{~K} $
2. $ 6700 \mathrm{~K} $
3. $ 8000 \mathrm{~K} $
4. $ 7800 \mathrm{~K}$

15.

The rms speed (in m/s) of oxygen molecules of the gas at temperature $300$ K, is:
1. $483$
2. $504$
3. $377$
4. $346$

16.

A horizontal tube of length $l$ dosed at both ends contains an ideal gas of molecular weight $M.$ The tube is rotated at a constant angular velocity $\omega$ about a vertical axis passing through an end. Assuming the temperature to be uniform and constant. If $P_1$ and $P_2$ denote the pressure at the free and the fixed end respectively, then choose the correct relation.
1. $\frac{P_2}{P_1}=e^{\frac{M\omega^2l^2}{2RT}}$
2. $\frac{P_1}{P_2}=e^{\frac{M\omega^2}{RT}}$
3. $\frac{P_1}{P_2}=e^{\frac{\omega lM}{3RT}}$
4. $\frac{P_2}{P_1}=e^{\frac{M^2\omega^2l^2}{3RT}}$

17.

The parts of two concentric circular arcs joined by two radial lines and carries current $i.$ The arcs subtend an angle $\theta$ at the centre of the circle the magnetic field at the centre $O,$ is:
1. $\frac{\mu_{_0}i(b-a)\theta}{4\pi ab}$
2. $\frac{\mu_{_0}i(b-a)}{4\pi ab}$
3. $\frac{\mu_{_0}i(b-a)\theta}{\pi ab}$
4. $\frac{\mu_{_0}i(a-b)}{2\pi ab}$

18.

$1$ kg of water is converted into steam at the same temperature and at $1$ atm ($100$ kPa). The density of water and steam are $1000$ kgm^-3 and $0.6$ kgm^-3 respectively. The latent heat of vaporization of water is $2.25 \times 10^6 \mathrm{~J} \mathrm{~kg}^{-1}$. What will be the increase in energy?
1. $ 3 \times 10^5 \mathrm{~J} $
2. $ 4 \times 10^6 \mathrm{~J} $
3. $ 2.08 \times 10^6 \mathrm{~J}$
4. None of these

19.

The ammeter shown in figure consists of a 480 $\Omega$ coil connected in parallel to a 20 $\Omega$ shunt. The reading of the ammeter is:

1. 0.125 A
2. 1.67 A
3. 0.13 A
4. 0.67A

20.

A lead ball at 30°C is dropped from a height of 6.2 km. The ball is heated due to the air resistance and it completely melts just before reaching the ground. The molten substance falls slowly on the ground. If the specific heat of lead = 126 Jkg^-1oc^-1 and a melting point of lead = 330°C and suppose that any mechanical energy lost is used to heat the ball, then the latent heat of fusion of lead is:
1. 2.4 × 10⁴ J kg^-1
2. 3.6 × 10⁴ J kg^-1
3. 7.6 × 10² J kg^-1
4. 42 × 10³ J kg^-1

21.

An inductor (L = 20 H), a resistor (R = 100 $\Omega$) and a battery (E = 10 V) are connected in series. After a long time, the circuit is short-circuited and then the battery is disconnected. Find the current in the circuit at 1 ms after short-circuiting.

1. 4.5 x 10⁶ A
2. 3.2 x 10^-5 A
3. 9.8 x 10^-6 A
4. 6.7 x 10^-4 A

22.

Two charges of + 10 $\mu\text C$ and +20 $\mu\text C$ are separated by a distance of 2 cm. The net potential (electric) due to the pair at the middle point of the line joining the two changes, is:

1. 27 MV
2. 18 MV
3. 20 MV
4. 23 MV

23.

A copper rod of length 20 cm and cross-sectional area 2 mm² is joined with a similar aluminium rod as shown below,

The resistance of a pair of rods is:
(

and

$(\rho_{_{al}}=2.6\times10^{-6})~\Omega-m$ and $(\rho_{_{Cu}}=1.7\times10^{-8})~\Omega-m$

1. 1.0 m$\Omega$
2. 2.0 m$\Omega$
3. 3.0 m$\Omega$
4. None of these

24.

A particle is subjected to two simple harmonic motions along the X-axis while the other is along a line making an angle of 45° with the X-axis. The two motions are given by $x = x_0$ sin $\omega t$ and $s = s_0$ sin $\omega t$. The amplitude of the resultant motion is:
1. $x_0+s_0+2x_0s_0$
2. $\sqrt{x^2_0+s^2_0}$
3. $\sqrt{x^2_0+s^2_0+2x_0s_0}$
4. $x^2_0=s^2_0+\sqrt2x_0s_0~^{1/2}$

25.

What is the change in the volume of $1.0~\mathrm{L}$ kerosene when it is subjected to an extra pressure of $2.0 \times 10^5 \mathrm{~Nm}^{-2}$ from the following data?
(The density of kerosene $=800~\mathrm{kgm^3}$ and the speed of sound in kerosene $=1330~\mathrm{ms^{-1}}$)
1. $ 0.97 \mathrm{~cm}^{-3} $
2. $ 0.66 \mathrm{~cm}^{-3} $
3. $ 0.15 \mathrm{~cm}^{-3} $
4. $0.59 \mathrm{~cm}^{-3}$

26.

A $4$ kg block is suspended from the ceiling of an elevator through a spring having a linear mass density of $19.2 \times 10^{-3} \mathrm{~kg} \mathrm{~m}^{-3} $. Find the speed with respect to the spring with which a wave pulse can proceed on the spring if the elevator accelerates up at the rate of $2.0$ ms^-2.
(Take $g=10$ ms^-2.)
1. $ 30 \mathrm{~m} / \mathrm{s} $
2. $42 \mathrm{~m} / \mathrm{s} $
3. $ 46 \mathrm{~m} / \mathrm{s} $
4. $ 50 \mathrm{~m} / \mathrm{s} $

27.

The lower end of the capillary tube is immersed in mercury. The level of mercury in the tube is found to be 2 cm below the Outer level. If the same tube is immersed in water, up to what height will the water rise in the capillary?
1. 5.9
2. 4.9
3. 2.9
4. 1 .9

28.

What is the increase in pressure required to decrease the volume of water sample by $0.01\%$?. (Bulk modulus of water $=2.1 \times 10^9 \mathrm{~Nm}^{-2}$)
1. $4.3 \times 10^4 \mathrm{~N} / \mathrm{m}^2 $
2. $ 1.8 \times 10^7 \mathrm{~N} / \mathrm{m}^2 $
3. $ 2.1 \times 10^5 \mathrm{~N} / \mathrm{m}^2 $
4. $3.7 \times 10^4 \mathrm{~N} / \mathrm{m}^2$

29.

Water level is maintained in a cylindrical vessel up to a fixed height $H.$ The vessel is kept on a horizontal plane. At what height above the bottom should a hole be made in the vessel, so that the water stream coming out of the hole strikes the horizontal plane of the greatest distance from the vessel?

1. $h=\frac{H}{2}$
2. $h=\frac{3H}{2}$
3. $h=\frac{2H}{3}$
4. $h=\frac{3}{4}H$

30.

The figure shows a spring + block + pulley system which is light. The time period of mass would be:

1. $2\pi\sqrt{\frac{k}{m}}$
2. $\frac{1}{2\pi}\sqrt{\frac{k}{m}}$
3. $2\pi\sqrt{\frac{m}{k}}$
4. None of these

31.

A pendant having a bob of mass $m$ is hanging in a ship sailing along the equator from east to west. When the strip is stationary with respect to water, the tension in the string is $T_0.$ The difference between $T_0$ and earth attraction on the bob, is:
1. $\frac{mg+m\omega^2R}{2}$
2. $\frac{m\omega^2R}{3}$
3. $\frac{m\omega^2R}{2}$
4. $\frac{m\omega^2}R$

32.

A solid sphere is set into motion on a rough horizontal surface with a linear speed $v$ in the forward direction and an angular speed $\frac{v}{R}$ in the anticlockwise direction as shown in the figure. The linear speed of the sphere when it stops rotating is:

1. $\frac{3v}{5}$
2. $\frac{2v}{5}$
3. $3v$
4. $\frac{6v}{5}$

33.

Two blocks of masses $m_1$ and $m_2$ are connected by a spring of spring constant $k.$ The block of mass $m_2$ is given a sharp impulse so that it acquires a velocity $v_0$ towards the right. What is the maximum elongation that the spring will suffer?

1. $\left[\frac{\mathrm{m}_1 \mathrm{~m}_2}{\mathrm{~m}_1+\mathrm{m}_2}\right]^{\frac{1}{2}} \mathrm{v}_0$
2. $\left[\frac{\mathrm{m}_1+\mathrm{m}_2}{\mathrm{~m}_1-\mathrm{m}_2}\right] \mathrm{v}_0$
3. $\left[\frac{\mathrm{m}_1+\mathrm{m}_2}{\mathrm{~m}_1-\mathrm{m}_2}\right]^{\frac{1}{2}} \mathrm{v}_0$
4. $\left[\frac{2 \mathrm{~m}_1+\mathrm{m}_2}{\mathrm{~m}_1 \mathrm{~m}_2}\right]^{\frac{1}{2}} \mathrm{v}_0$

34.

A ball of mass $m$ hits the floor with a speed $v$ making an angle of incidence $e$ with the normal. The coefficient of restitution is $e.$ The speed of the reflected ball and the angle of reflection of the ball will be:

1. $v'=v,~\theta=\theta'$
2. $v'=\frac v2,~\theta=2\theta'$
3. $v'=2v,~\theta=2\theta'$
4. $v'=\frac{3v}{2},~\theta=\frac{2\theta'}3$

35.

A particle slides on the surface of a fixed smooth sphere starting from the topmost point. The angle rotated by the radius through the particle, when it leaves contact with the sphere, is:
1. $\theta=cos^{-1}\Big(\frac13\Big)$
2. $\theta=cos^{-1}\Big(\frac23\Big)$
3. $\theta=tan^{-1}\Big(\frac13\Big)$
4. $\theta=sin^{-1}\Big(\frac43\Big)$

36.

What is the radius of curvature of the parabola traced out by the projectile in the previous problem at a point where the particle velocity makes an angle $\frac{\theta}{2}$ with the horizontal?
1. $r=\frac{v^2\cos^2\theta}{g\cos^2\theta}$
2. $r=\frac{2v\sin\theta}{g\tan\theta}$
3. $r=\frac{v\cos\theta}{g\sin^2\frac{\theta}{2}}$
4. $r=\frac{3v\cos\theta}{g\cot\theta}$

37.

A block of mass 2 kg is pushed against a rough vertical wall with a force of 40 N, coefficient of static friction being 0.5. Another horizontal force of 15 N, is applied on the block in a direction parallel to the wall. If the block will move, then its direction would be:

1. 15 ° with 15 N force
2. 53 ° with 15 N force
3. 45 ° with 15 N force
4. 75 ° with 15 N force

38.

A block is kept on the floor of an elevator at rest. The elevator starts descending with an acceleration of 12 m/s². Find the displacement of the block during the first 0.2 s after the start. (Take, g = 10 m/s²)

1. 30 cm
2. zero
3. 20 cm
4. 25 cm

39.

A monkey of mass 15 kg is climbing on a rope with one end fixed to the ceiling. If it wishes to go up with an acceleration of 1 m/s², how much force should it apply to the rope if the rope is 5 m long and the monkey starts from rest?

1. 150 N
2. >160 N
3. 165N
4. 150<T $\leq$ 160N

40.

A square loop is made by a uniform conductor wire as shown in the figure,
The net magnetic field at the centre of the loop if the side length of the square is a:
1. $\frac{\mu_{_0}i}{2a}$
2. zero
3. $\frac{\mu_{_0}i^2}{a^2}$
4. None of these

41.

The electron of an H-atom is revolving around the nucleus in circular orbit having radius $\frac{h^2}{4\pi me^2}$ with $\Big(\frac{2\pi e^2}{h}\Big).$ The current produced due to the motion of the electron is:
1. $\frac{2\pi m^2e^2}{3h^2}$
2. zero
3. $\frac{2\pi^2me}{h^2}$
4. $\frac{4\pi^2me^5}{h^3}$

42.

Two small balls, each carrying a charge $q$ are suspended by equal insulator strings of length 1 m from the hook of a stand. This arrangement is carried in a satellite in space. The tension in each string will be:
1. $\frac{1}{4\pi \varepsilon_0}\frac{q}{I^2}$
2. $\frac{1}{4\pi\varepsilon_0}\frac{q^2}{4I^2}$
3. $\frac{1}{4\pi\varepsilon_0}\frac{q^2}{I^2}$
4. $\frac{1}{(4\pi~\varepsilon_0)}\frac{q}{I}$

43.

A vessel of depth $t$ is half filled with a liquid having a refractive index $n_1$ and the other half is filled with water having a refractive index $n_2.$ The apparent depth of the vessel as viewed from the top is:
1. $\frac{2t(n_1+n_2)}{n_1n_2}$
2. $\frac{tn_1n_2}{(n_1+n_2)}$
3. $\frac{t(n_1+n_2)}{2n_1n_2}$
4. $\frac{n_1n_2}{(n_1+n_2)t}$

44.

In the photoelectric effect, the number of photo-electrons emitted is proportional to:

1.	velocity of incident beam
2.	frequency of incident beam
3.	intensity of incident beam
4.	work function for cathode material

45.

A change of 8.0 mA in the emitter current brings a change of 7 .9 mA in the collector current. The value of a will be:

1. 0.86
2. 0.91
3. 0.80
4. 0.99

46.

The half-life of ¹⁹⁸Au is 2-.7 days. The average life is:

1. 4 days
2. 3.4 days
3. 3.9 days
4. None of the above

47.

The de-Broglie wavelength of electrons falling on the target in an X-ray tube is 'A. The cut-off wavelength of the emitted X-ray is:
1.   $λ_{0} = \frac{{(mcλ)}^{2}}{h}$
2.   $λ_{0} = \frac{m^{2} cλ}{h^{2}}$
3.   $λ_{0} = \frac{2 m {cλ}^{2}}{h}$
4.   $λ_{0} = \frac{2 m {cλ}^{2}}{h^{2}}$

48.

If M₀ is the mass of an oxygen isotope ₈O¹⁷, M_P and M_n are the masses of a proton and a neutron, respectively, the nuclear binding energy of the isotope is:
1.   $M_{o} c^{2}$
2.   $(M_{o} - 17 M_{c}) c^{2}$
3.   $(M_{o} - 8 M_{p}) c^{2}$
4.   $(8 M_{p} + 9 M_{n} - M_{o}) c^{2}$

49.

A nucleus disintegrates into two nuclear parts which have their velocities in the ratio $2:1$. The ratio of their nuclear size will be:
1. $ 2^{1 / 3}: 1 $
2. $ 1: 3^{1 / 2} $
3. $ 3^{1 / 2}: 1 $
4. $ 1: 2^{1 / 3}$

50.

The given $P-V$ diagram shows gases during the adiabatic process plots $1$ and $2$ should correspond respectively to:

1. $\mathrm{He}$ and $\mathrm{O_2}$
2. $\mathrm{O_2}$ and $\mathrm{He}$
3. $\mathrm{He}$ and $\mathrm{Ar}$
4. $\mathrm{O_2}$ and $\mathrm{N_2}$

51.

For an adiabatic expansion of a monatomic perfect gas, the volume increases by $24\%$. What is the percentage decrease in pressure?
1. $24\%$
2. $40\%$
3. $48\%$
4. $71\%$

52.

A body weighing $8~ \mathrm{g}$ when placed in one pan and $18~ \mathrm{g}$ when placed on the other pan of a false balance. If the beam is horizontal when both the pans are empty, then the true weight of the body is:
1. $13~ \mathrm{g}$
2. $9~ \mathrm{g}$
3. $22~ \mathrm{g}$
4. $12~ \mathrm{g}$

53.

A rod Ab of length 1 is moving with ends remaining in contact with frictionless wall and floor. If at the instant, shown the velocity of end B is 2 m/s towards the negative direction of x. The speed of end A will be:

1.   $\sqrt{3} {ms}^{- 1}$
2.   $\frac{2}{\sqrt{3}} {ms}^{- 1}$
3.   $\sqrt{2} {ms}^{- 1}$
4.   $\frac{\sqrt{5}}{2} {ms}^{- 1}$

54.

Universal time is based on:

1. Rotational effect of the earth about its axis
2. Vibrations of cesium atom
3. Orbital motion of the earth around the sun
4. Oscillation of quartz crystal

55.

A slab consists of portions of different materials of the same thickness and having the conductivities K₁and K₂. The equivalent thermal conductivity of the slab is:
1.   $K_{1} + K_{2}$
2.   $\sqrt{K_{1} + K_{2}}$
3.   $\frac{2 K_{1} K_{2}}{K_{1} + K_{2}}$
4.   $\sqrt{\frac{K_{1} K_{2}}{K_{1} + K_{2}}}$

56.

Two rigid boxes containing different ideal gases are placed on the table. Box $A$ contains one mole of nitrogen at temperature $T_0$, while box $B$ contains $1$ mole of helium at temperature $\frac{7T_0}{3}$. The boxes are then put into thermal contact with each other and heat flows between them until the gases reach a common final temperature (ignore the heat capacity of boxes) then the final temperature of gases, $T_f$in terms of $T_0$ is:
1. $ \frac{2 \mathrm{~T}_0}{5} $
2. $ \frac{3 \mathrm{~T}_0}{7} $
3. $ \frac{5 \mathrm{~T}_0}{3} $
4. $ \frac{9 \mathrm{~T}_0}{7}$

57.

The temperature of the cold junction of the thermocouple is 0 °C and the temperature of the hot junction is T °C. The emf is E = 16T- 0.04T² µV. The inversion temperature T_i is:

1. 300⁰ C
2. 200⁰ C
3. 500⁰ C
4. 400⁰ C

58.

The galvanometer resistance is 30 $\Omega$ and it is connected to 2 V batteries along with a resistance of 2000 $\Omega$ in the series. A full-scale deflection of 25 divisions is obtained. In order to reduce this deflection to 20 divisions, the resistance in series should be:

1. 2470 $\Omega$
2. 2320 $\Omega$
3. 2180 $\Omega$
4. 2210 $\Omega$

59.

A thin bar magnet of length $2L$ is bent at the mid-point so that the angle between them is $60^\circ$. The new length of the magnet is:
1. $ \frac{\mathrm{L}}{2 \sqrt{3}} $
2. $ \frac{\sqrt{3} \mathrm{~L}}{2} $
3. $\mathrm{~L} $
4. $\frac{2 \mathrm{~L}}{3}$

60.

The magnetic flux through each turn of a coil having 200 turns is given as

(t^{2} - 2 t) \times 10^{- 3}

Wb, where t is in second. The emf induced in the coil at t = 3 s is:

1. 0.7 V
2. 1.2 V
3. 0.8 V
4. 0.9 V

61.

Given that the reduced temperature, the reduced pressure, the reduced volume, Thus, it can be said that the reduced equation of state may be given as:
1.
2.
3.
4.

62.

The suitable reaction steps to carry out the following transformation is:

1.   $\to_{(ii) H_{2} O_{2} . NaOH}^{(i) {BH}_{3} . THF} \overset{{HlO}_{4}}{\to}$
2.   $\to_{{({CH}_{3})}_{3} C . COOH . {OH}^{-}}^{Os O_{4}} \to_{H_{2} O}^{K_{3} {Cr}_{2} O_{7} . H_{2} {SO}_{4}}$
3.   $\to_{(ii) H_{2} O_{2} . NaOH}^{(i) {BH}_{3} . THF} \to_{{CH}_{2} {Cl}_{2}}^{PCC}$
4.   $\overset{H_{2} O H_{2} {SO}_{4} (dil .)}{\to} \to_{{CH}_{2} {Cl}_{2}}^{PCC}$

63.

Here, Z is:

1. SO₃
2. Colloidal sulphur
3. Gaseous sulphur
4. Solid Sulphur

64.

For preparing 3.00 L of 1M NaOH by mixing portions of two stock solutions (A and B) of 2.50 M NaOH and 0.40 M NaOH respectively. Find out the amount of B stock solution (in L) added.

1. 8.57 L
2. 2.14L
3. 1.28 L
4. 7.51 L

65.

Sodium sulphite is used in preserving squashes and other mildly acidic foods due to:

1. Potassium salt has preservative action
2. Potassium metabisulphite prevents oxidation
3. Potassium metabisulphite is not influenced by acid
4. Sulphur dioxide and sulphurous acid formed kill bacteria and germs

66.

The Vividh Bharti Station of All India Radio, Delhi, broadcasts on a frequency of 1,368 kHz (Kilohertz). Calculate the wavelength (

.) of the electromagnetic radiation emitted by transmitter. Which part of the electromagnetic spectrum does it belong to?

1. 319.4 m and X-rays
2. 319.4 m and radio wave
3. 219.3 m and microwave
4. 219.3 m and radio wave

67.

Which of the following soap/detergent is least, reduce space biodegradable?
1.   ${CH}_{3} - {({CH}_{2})}_{11} - {OSO}_{2} Na$
2.   $C_{17} H_{35} - COONa$
3.
4.

68.

In an atom, an electron is moving with a speed of 600 m/s with an accuracy of 0.005%. The certainty with which the position of the electron can be located is:
(Given, h=6.6×10^-34 Kgm²s^-1, the mass of electron e_m = 9.1×10^-31 kg)
1. 2.15×10^-3m
2. 2.78×10^-3m
3. 1.92×1^-3 m
4. 3.24×10^-3m

69.

Buna-N, a synthetic rubber is copolymer of:
1. $H_{2} C = CH - CH = {CH}_{2} and H_{5} C_{6} - CH = {CH}_{2}$
2. $H_{2} C = CH - CN and H_{2} C = CH - CH = {CH}_{2}$
3.
4.

70.

What would be the heat released when an aqueous solution containing 0.5 mole of HN03 is mixed with 0.3 mole of OH^-?
(Enthalpy of neutralization is - 57.1kJ)

1. 28.5 kJ
2. 17.1 kJ
3. 45.7 kJ
4. 1 .7 kJ

71.

The number average molar mass and mass average molar mass of a polymer are respectively 30,000 and 40,000. The polydispersity index (PDI) of the polymer is

1. -1
2. 0
3. > 1
4. < 1

72.

The charge/size ratio of a cation determines its polarising power. Which one of the following sequences represents the increasing order of the polarising power of the cationic species, K+, Ca2 +, Mg2⁺, Be2⁺?

1. K⁺ < Ca2⁺ < Mg2⁺ < Be2⁺
2. Be2⁺< K2⁺ < Ca2⁺ < Mg2⁺
3. Mg2⁺ < Be2⁺ < K⁺ < Ca2⁺
4. Ca2⁺ < Mg2⁺ <Be⁺ < K⁺

73.

In an amino acid, the carboxyl group ionises at pK_a1 = 2.34 and ammonium ion at pK_a2 = 9.60. The isoelectric point of the amino acid is at pH

1. 4.32
2. 3.34
3. 9.46
4. 5.97

74.

0.40 g of helium in a bulb at a temperature of T K had a pressure of p atm. When the bulb was immersed in a water bath at temperature 50 K more than the first one, 0.08 g of gas had to be removed to restore the original pressure. T is

1. 500 K
2. 400 K
3. 600 K
4. 200 K

75.

What percentage of

glucopyranose is found at equilibrium in the aqueous solution?

1. 64%
2. 36%
3. 100%
4. 50%

76.

Which of the following is correctly arranged in order of increasing weight?

1. 0.0105 equivalent of H₂C₂O₄. 2H₂O<0.625g of Fe<0.006g atom of Ag<6.0×10²¹ atoms of Zn
2. 0.625 g of Fe < 0.0105 equivalent of H₂C₂O₄ 2H₂O<6.0×10²¹ atoms of Zn<0.006g atoms of Ag
3. 0.625 g of Fe<6.0×10²¹ atoms of Zn<0.006 g atoms of Ag<0.0105 equivalent of H₂C₂O₄.2H₂O
4. 0.0105 equivalent of H₂C₂O₄. 2H₂O < 0.006 g atoms of Ag<6.0×10²¹ atoms of Zn<0.625 g of Fe

77.

The correct order of basic strength of the following are:

1. I > II > IV > III
2. IV > III > II > I
3. II > III > IV > I
4. III> IV> II> I

78.

If for a given substance, melting point is T8 and freezing point is T_A then correct variation of entropy by graph between entropy changes:
1.
2.
3.
4.

79.

When a mixture of 1-hexanol and hexanoic acid in diethyl ether is shaken with an aqueous NaHC0₃solution, then which of the following is right distribution?

1. a
2. b
3. c
4. d

80.

S and

S for the reaction,

, are 30.56 KJ mol^-1 and 66.00 Jk^{-1 mol-1}respectively. The temperature at which the free energy change for the reaction will be zero change for the reaction will be zero, is

1. 3528 K
2. 463 K
3. 73 K
4. 144 K

81.

The major product P will be
1.
2.
3.
4.

82.

Then, for

Equilibrium constant will be

1. 4.68 x 10^-3
2. 5.2x 10^-17
3. 0.31 X 10^-2
4. 3.1 X 10^-2

83.

What is product of the following sequence of reactions?

1.
2.
3.
4.

84.

For the following equilibrium (omitting charges)
I. M+Cl MCl, K_eq =
II. MCl + Cl MC1, K_eq =
III. MCl2 + Cl MCl3, K_eq =
IV. M + 3Cl MC1, K_eq =K
Then relationship between k,, , is
1.   $K = β_{1} β_{2} β_{3}$
2.   $\log K = \log β_{1} + \log β_{2} + \log β_{3}$
3.   $P_{k} = P_{β_{1}} P_{β_{2}} + P_{β_{3}}$
4. All of the above

85.

R-CH₂-CH₂-OH can be converted into
RCH₂CH₂COOH by the following sequence of steps:
1.   ${PBr}_{3}, - KCN, H_{2} / Pt$
2.   ${PBr}_{3}, KCN, H_{3} O^{+}$
3.   $HCN, {PBr}_{3}, H_{3} O^{+}$
4.   $KCN, H_{3} O^{+}$

86.

When KMnO₄ acts as an oxidizing agent and ultimately forms MnO₄^2-, MnO₂, Mn₂O₃ and Mn₂⁺, then the number of electrons transferred in each case respectively is

1. 1, 3, 4, 5
2. 3, 2, 1, 4
3. 1, 5, 3, 7
4. 4, 3, 2, 1

87.

The product P of the given reaction is

1.
2.
3.
4.

88.

In acidic medium, dichromatic ion oxidises ferrous ion to ‘ferric ion. If the gram molecular weight of potassium dichromate is 294 g, its gram equivalent weight (in grams) is

1. 24.5
2. 49
3. 125
4. 250

89.

Find out the correct stereoisomeric product for the following reaction,

1. d-form
2. l-from
3. meso-form
4. racemic mixture

90.

Ferrous oxide has a cubic structure. The length of edge of the unit cell is 5

and the density of the oxide is 4.0 g cm^-3. Then the number of Fe²⁺ and O^2- ions present in each unit cell will be

1. Four Fe²⁺ and two O^2-
2. Four Fe²⁺ and four O^2–
3. Two Fe²⁺and four O^2–
4. Two Fe²⁺ and two O^2-

91.

In the reaction

Z is

1. o-bromotoluene
2. m-bromotoluene
3. p-bromotoluene
4. 3-bromo-2, 2, 6- trichlorotoluene

92.

Which of the following arrangements correctly represent hexagonal and Cubic close-packed structure respectively?

1. ABAB ............. and ACBACB...........
2. ABCABC ......... and ABAB............
3. Both have ABCABC.............. Arrangement
4. Both have ABAB ............. arrangement

93.

0.001 mole of was passed through a cation exchanger and the acid coming out of it required 20mL of 0.1 M NaOH for neutralization. Thus, the complex is
1.   $[CO {({NH}_{3})}_{5} ({NO}_{3}) {SO}_{4}]$
2.   $[CO {({NH}_{3})}_{5} ({SO}_{4})] {NO}_{3}$
3.   $[CO {({NH}_{3})}_{5}] {NO}_{3} . {SO}_{4}$
4. None of the above

94.

The molar freezing point depression constant for benzene (C₆H₆) is 4.90 K Kg more 1 Selenium exists as a polymer of the type Se_x. When 3.26 g of selenium is dissolved in 226g of benzene, the observed freezing point is 0.112 °C lower than that of pure benzene. The molecular formula of selenium is (atomic mass of Se = 78.8 g mol^-1)

1. Se₈
2. Se₆
3. Se₄
4. Se₂

95.

In the complexes, , and more stability is shown by
1.   ${[{FeCl}_{6}]}^{3 -}$
2.   ${[Fe {(C_{2} O_{4})}_{3}]}^{3 -}$
3.   ${[Fe {(H_{2} O)}_{6}]}^{3 +}$
4.   ${[Fe {(CN)}_{6}]}^{3 -}$

96.

For an ideal binary liquid solution with p_x⁰>p_y⁰ which relation between X_x (mole fraction of X in liquid phase) and Y_x (mole fraction of X in vapour phase) is correct, X_y and Y_y are mole fraction of Y in liquid and vapour phase respectively
1.   $X_{x} > Y_{x}$
2.   $X_{x} = Y_{x}$
3. $\frac{X_{x}}{X_{y}} < \frac{Y_{x}}{Y_{y}}$
4.   $X_{x}, Y_{x}, X_{y} and Y_{y}$ cannot be correlated

97.

Point out the incorrect reaction from the following.
1.   $2 {Na}_{2} Cl + H^{+} \overset{}{\to} {Na}_{2} {Cr}_{2} O_{7} + 2 {Na}^{+} + H_{2} O$
2.   $4 {MnO}_{2} + 4 KOH + O_{2} \overset{}{\to} 4 {KMnO}_{4} + 2 H_{2} O$
3.   $2 {MnO}_{4}^{-} + 5 C_{2} {O_{4}}^{2 -} + 16 H^{+} \overset{}{\to} 2 {Mn}^{2 +} + 10 {CO}_{2} + 8 H_{2} O$
4.   ${MnO}_{4}^{-} + 8 H^{-} + 5 {Fe}^{2 +} \overset{}{\to} 5 {Fe}^{3 +} + 10 {CO}_{2} + 8 H_{2} O$

98.

X, Y and Z respectively are
1.
2.
3.
4.

99.

A student made the following observations in the laboratory.
I. Clean copper metal did not react with 1 molar Pb (N0₃)₂ solutions
II. Clean lead metal dissolved in a 1 molar AgN0₃ solution and crystals of Ag metal appeared
III. Clean silver metal did not react with 1 molar Cu (N03)₂ solution
The order of decrease in reducing character of three metals is

1. Pb, Cu, Ag
2. Pb, Ag, Cu
3. Cu, Ag, Pb
4. Cu, Pb, Ag

100.

Choose the correct alkyne and reagents for the preparation

1.
2.
3.
4.

101.

The conductivity of 0.001028 mol L^-1 acetic acid is 4.95 x 10-5 S cm^-1 Find out its dissociation constant if

_m for acetic acid is 390.5Scm^-1mol¹

1. 18x 10^-5 mol-1 L^-1
2. 1.78x 10^-5 mol L^-1
3. 3.72x 10^{- 4} mol L^-1
4. 2.37x 10^-4 mol L^-1

102.

In order to prepare one litre 1N solution of KMnO₄, how many grams of KMnO₄ are required, if the solution to be used in acid medium for oxidation?

1. 128g
2. 41.75g
3. 31.60g
4. 62.34g

103.

Which of the following represents the correct order of decreasing number of S =0 bonds?
1.   $H_{2} {SO}_{4} > H_{2} {SO}_{3} > H_{2} S_{2} O_{8}$
2.   $H_{2} S_{2} O_{8} > H_{2} {SO}_{3} > H_{2} {SO}_{4}$
3.   $H_{2} S_{2} O_{8} > H_{2} {SO}_{4} > H_{2} {SO}_{3}$
4.   $H_{2} {SO}_{3} > H_{2} S_{2} O_{8} > H_{2} {SO}_{4}$

104.

A hypothetical reaction,
X₂ + Y₂2XY follow the following mechanism

X+Y₂XY+Y…… slow
X+YXY……. Fast
The order of the overall reaction is
1. 2
2. 3/2
3. 1
4. 0

105.

The major role of fluorspar (CaF₂ ) which ,is added in small quantity in the electrolytic reduction of alumina dissolved in fused cryolite (Na₃AlF₆ ) is
I. as a catalyst.
II. To make the fused mixture very conducting.
III. To lower the temperature of melting.
IV. To decrease the rate of oxidation of carbon at the anode.

1. I, II
2. II, III
3. I, II, III
4. III, IV

106.

The variation of concentration of the product P with time in the reaction, AP is shown in following graph.

The graph between and time will be of the type
1.
2.
3.
4.

107.

Point out the correct statement.

1. Below 710 °C, C is better reducing agent than CO
2. Below 710 °C, CO is better reducing agent than C
3. Below 710 °C, CO is an oxidizing agent
4. Below 710 °C, C02 is a reducing agent

108.

Which of the following represents physical adsorption?
1.
2.
3.
4.

109.

KMn0 4 reacts with ferrous sulphate according to the following equation,

Here, 10 mL of 0.1M KMn0₄ is equivalent to

1. 50 ml of 0.1 M FeS0₄
2. 20 ml of 0.1 MFeS0₄
3. 40 ml of 0.1 M FeS0₄
4. 30 ml of 0.1 MFeS0₄

110.

In experiment, addition of 4.0 mL of 0.005 M BaCl2 to 16.0 mL of arsenious sulphide sol just causes complete coagulation in 2 h. The flocculating value of the effective ion is

1. Ba²⁺, 1 .0
2. Ba²⁺, 2.0
3. Cl^-, 1 .0
4. Cl^-, 2.0

111.

Which of the following atomic and physical properties of hydrogen is false?

1. Hydrogen > Deuterium > Tritium;(Melting point /K)
2. Hydrogen < Deuterium < Tritium;(Boiling point/K)
3. Hydrogen< Deuterium< Tritium; (density /gl- 1)
4. Hydrogen > Deuterium > Tritium;(%relative abundance)

112.

Eutrophication of a lake means, it

1. is low is nutrients
2. is high in nutrients
3. Has a high temperature
4. Has excess amount of organic matter

113.

When H₂0₂ is added to ice cold solution of acidified potassium dichromate in ether and the contents are shaken and allowed to stand

1. A blue colour is obtained in ether because of formation of Cr0₅
2. A blue colour is obtained in ether because of formation of Cr0₃
3. A blue colour is obtained in ether because of formation of Cr₂ (SO₄) a
4. Chromyl chloride is formed

114.

500 mL of a sample of water required 19.6 mg of K₂Cr₂0₇ for the oxidation of dissolved organic matter in it in the presence of H₂SO₄. The COD of water sample is

1. 3.2 ppm
2. 7.2 ppm
3. 6.4 ppm
4. 4.6 ppm

115.

The chemical formulae of X, Y and Z are

1. a
2. b
3. c
4. d

116.

for carbon ion

Stability order will be

1. P > Q > S > R
2. P > R > Q > S
3. Q > R > S > R
4. S > R > Q > P

117.

The aqueous solution of an unknown sodium salt gives the following reactions.
I. It decolorizes a solution of iodine in potassium iodide.
II. It gives white turbidity with dil. HCl solution.
III. It gives a white precipitate with AgN0₃ solution which changes colours and finally becomes black on standing.
The unknown sodium salt is

1. Sodium thiosulphate
2. Sodium bisulphite
3. Sodium sulphite
4. Sodium sulphide

118.

The catenation tendency of C, Si and Ge is in the order Ge < Si < C. The bond energies (in kJ mol^-1) of C-C, Si-Si and Ge-Ge bonds respectively are

1. 348, 167, 180
2. 348, 180, 167
3. 167, 180, 348
4. 180, 167, 348

119.

What is correct about the following structure?

1. Total stereoisomers = 4
2. Number of chiral carbons= 1
3. Number of optical isomers= 2
4. Number of meso compounds= 2

120.

Number of oxygen atoms shared per SiO₄^4- Tetrahedron in
I. Two dimensional sheet structured silicates
II. Cyclic silicates and
III. Single strand chain silicates respectively are

1. 3, 3, 2
2. 3, 2, 2
3. 4, 3, 1
4. 4, 3, 2

121.

Which of the following is the most primitive ancestor of man?

1. Ramapithecus
2. Homo habilis
3. Australopithecus
4. Homo sapiens neanderthalensis

122.

Vitamin-B₁₂ is absorbed primarily in the

1. Stomach
2. duodenum
3. Jejunum
4. ileum

123.

The faster breathing in high fever is due to the

1. Additional requirement of 02 for the invader germs
2. High temperature of the body
3. Mental worry of a patient
4. Loss of appetite

124.

Which of the following animals possess non-elastic lungs with elastic air sacs connected to them?

1. Reptiles
2. Birds
3. Amphibians
4. Mammals

125.

Which of the following is not correctly matched?

1. Trichomonas vaginalis - Leishmaniasis
2. Glossina palpalis- Sleeping sickness
3. Aedes aegypti- Yellow fever
4. Culex pipiens- Filariasis

126.

Carotid labyrinth contains

1. Olfactory receptors
2. Baroreceptors
3. Chemoreceptors
4. Phonoreceptors

127.

Occupational lung diseases that occurs in humans, among those given below is

1. dyspnea
2. anthracosis
3. Atelectasis
4. cyanosis

128.

Epiphyseal plates at the extremities of long bones help in

1. Bone moulding
2. Elongation of bone
3. Bone formation
4. Formation of Haversian canal

129.

The strongest muscle in the human is

1. Biceps
2. Gluteus maximus
3. Stapedius
4. masseter

130.

Parkinsonism is related with

1. Brain
2. spinal nerve
3. Cranial nerves
4. All of these

131.

Meniere's disease is associated with

1. Ear
2. eye
3. Nose
4. throat

132.

If the threshold for hearing increasing 1000 times, the hearing loss is

1. 40 decibels
2. 50 decibels
3. 60 decibels
4. none of these

133.

Gonads are derived from

1. Ectoderm
2. mesoderm
3. Endoderm
4. None of the above

134.

The number of chromosomes in a primary spermatocyte is

1. Same as in spermatid
2. Same as in spermatogonium
3. Help of that in spermatogonium
4. Same as in secondary spermatocyte

135.

The portion of the endometrium that covers the embryo and is located between the embryo and the uterine cavity is the

1. Decidua basalis
2. Decidua umbilicus
3. Decidua capsularis
4. Decidua functionalis

136.

Depo-provera refers to

1. Injectible contraceptive
2. Intra uterine device
3. Implant
4. Oral contraceptive

137.

What base is responsible for hot spots for spontaneous point mutations?

1. Adenine
2. Guanine
3. 5-bromouracil
4. 5-methyl cytosine

138.

During which geological period of evolution did the greatest diversification of life occurred on the earth?

1. Permian
2. Jurassic
3. Cambrian
4. Ordovician

139.

Specific radioactive identification of ribosomal RNA can be achieved by using C₁₄ labelled

1. Guanine
2. uracil
3. Thymine
4. cytosine

140.

Which of the following is the Pribnow box?

1. 5 -TATAAT-3'
2. 5'-TAATAT-3'
3. 5'-A AT A AT-3'
4. 5'-A TAT T A-3'

141.

The genome of Caenorhabditis elegans consists of

1. 3 billion base pairs and 30,000 genes
2. 12 million base pairs and 6000 genes
3. 4.7 million base pairs and 4000 genes
4. 97 million base pairs and 18,000 genes

142.

About how long ago was the earth formed?

1. 3 billion years ago
2. 10 billion years ago
3. 4.6 billion years ago
4. 20 billion years ago

143.

Gas gangrene is caused by

1. Clostridium botulinum
2. Xanthomonas campestris
3. Pseudomonas
4. Clostridium perfringens

144.

Who received Nobel Prize in 1951 for the development of vaccine for yellow fever?
1. Max Theiler
2. Ronald Ross
3. Max Delbruck
4. Francis Peyton Rous

145.

Continuous exposer to vinyl chloride may cause cancer of the

1. Liver
2. spleen
3. Vagina
4. prostate gland

146.

Which of the following T-cells are destroyed by HIV?

1. Cytotoxic T-cells
2. Killer T-cells
3. Suppressor T-cells
4. Helper T-cells

147.

An autoimmune disease is

1. AIDS
2. haemophilia
3. Allergy
4. Myasthenia gravis

148.

Which hormone produces calorigenic effect?

1. Thyroxine
2. FSH
3. Insulin
4. All of these

149.

Which of the following act as an antigen, but do not induce antibody production?

1. Haustra
2. Histones
3. Haptens
4. None of these

150.

Haldane effect refers to

1. More acidity in the blood
2. Less acidity in the blood
3. More basicity in the blood
4. Less basicity in the blood

151.

The plant whose seeds are known to leave the longest viability period is

1. Carica papaya
2. Triticum aestivum
3. Ziziphus mauritiana
4. Nelumbo nucifera

152.

Jute is a

1. bast fibre from secondary xylem
2. bast fibre from primary xylem
3. bast fibre from secondary phloem
4. bast fibre from primary phloem

153.

Chlorosis is produced in the leaves due to the deficiency of Fe, Mg, Mn, S or N of these essential elements, those that are exclusive constituents of chlorophyll molecules are

1. Fe, S
2. N, S
3. Mg, S
4. Mg, N

154.

Read the following statements and choose the correct option.
I. Leptosporangiate development of sporangium is found in all members Pteropsida.
II. Seed habit is shown by Selaginella.
III. Gnetum leaves are monomorphic and pinnately compound.
IV. Sporic meiosis is found in Volvox, Chlamydomonas and Ulothrix.
Choose the correct option. _

1. I and IV
2. I and II
3. I, II and IV
4. All of these

155.

Which of the following characteristics out of I, II and III are exhibited by C₄ plants?
I. Kranz anatomy.
II. The product of photosynthesis is oxalo acetic acid.
III. Both PEP carboxylase and ribulose-his phosphate carboxylase act as a carboxylating enzyme.
Choose the correct option.

1. I and II, but not III
2. II and III, but not I
3. I and III, but not II
4. All of these

156.

Match the following column I and II for organismic respiration.

1. A-2 B-3 C-1
2. A-3 B-2 C-1
3. A-1 B-3 C-2
4. A-3 B-1 C-2

157.

Compare the statements I and II and choose correct options.
Statement (I) Auxin promotes apical dominance by suppressing the activity of lateral buds.
Statement (II) In moriculture, periodic pruning of shoot tips is done to make mulberry plants bushy.
Choose the correct options.

1. I is false, but II is true
2. II is false, but I is true
3. Both I and II are true
4. Both I and II are false

158.

The one advantage of cleistogamy is

1. It leads to greater genetic diversity
2. Seed dispersal is more efficient and wide spread
3. Seed set is not dependent on pollinators
4. Each visit of a pollinator results in transfer of hundreds of pollen grains

159.

In coconut, the liquid endosperm is formed because

1. karyokinesis is not followed by cytokinesis
2. karyokinesis is followed by cytokinesis
3. Formation of liquid endosperm is not dependent upon karyokinesis and cytokinesis
4. None of the above

160.

Keeping in view the structure of cell membrane, which one of the following statements is correct with respect to the movements of liquid and proteins from one liquid monolayer to the other (flip flop movement).

1. While proteins can flip flop, liquids can not
2. Neither lipids, nor proteins can flip flop
3. Both lipids and proteins can flip flop
4. While lipids can flip-flop at times, proteins can not

161.

Ribosomes are particles about 200 A units in diameter consisting of protein and RNA. The percentage of protein and RNA is respectively

1. 80% and 20%
2. 60% and 40%
3. 50% and 50%
4. 40% and 60%

162.

Match the biological molecule listed under column I with their biological function listed under column II. Choose the answer which gives correct combination of alphabets of the two columns.

Column I (Biological Molecule)	Column II (Function)
A. Glycogen B. Globulin C. Steroid D. Thrombin	1. Hormone 2. Biocatalyst 3. Antibody 4. Storage product

1. A-3 B-2 C-4 D-1
2. A-4 B-2 C-1 D-3
3. A-2 B-4 C-3 D-1
4. A-4 B-3 C-1 D-2

163.

In pea plants, yellow seeds are dominant to green. If a heterozygous yellow seeded plant is crossed with a green seeded plant, what ratio of yellow and green seeded plants could you expect in F1-generation?

1. 9 : 1
2. 1: 3.
3. 3: 1
4. 50: 50

164.

In a mutational event, when adenine is replaced by guanine, it is a case of

1. Frameshift mutation
2. Transcription
3. Transition
4. Transversion

165.

Independent assortment of gene occurs due to the orientation of chromosomes at

1. Metaphase-I of mitosis
2. Metaphase-I Of meiosis
3. Metaphase-II of meiosis
4. Any phase of the cell division

166.

The non-disjunction, in meiosis may result is extra copy of a chromosome in a sperm cell. During which phase the above phenomenon may occur?

1. Prophase-1, prophase-II
2. Metaphase-I, anaphase-II
3. Anaphase-I, anaphase-II
4. AnaphaseI1, telophase-II

167.

Which of the following is true regarding the phage lambda, a virus which infects bacteria?

1. In the lytic cycle, the bacterial host replicates viral DNA, passing it on to daughter cells during binary fission
2. In the lysogenic cycle, the bacterial host replicates viral DNA, passing it onto daughter cells during binary fission
3. In the lytic cycle, viral DNA is integrated into the host genome
4. In the lysogenic cycle, the host bacterial cell burst, releasing phases

168.

The part of the bacterial chromosome sharing homology with genome fragment transferred from the recipients to cell during merozygote formation is known as

1. Eugenic
2. Exogenote
3. Endogenote
4. Dysgenic

169.

In 1944, Avery, McCarty and MacLeod isolated a substance from heat-killed virulent form of bacteria and added to non-virulent form of bacteria which changed the non-virulent to virulent from this substance can be destroyed by

1. DNAase
2. Protease
3. Lipase
4. Amylase

170.

Thermococcus, Methanococcus and Methanobacterium are groups of
1. Bacteria containing a cytoskeleton and all membrane bound organelles
2. Archaebacteria with peptidoglycan in their cell wall
3. Archaebacteria that consists of protein homologous to eukaryotic core histones
4. Most advanced type of bacteria

171.

Match the following Column I with Column II.

Column I	Column II
A. Complementary ratio B. Supplementary ratio C. Epistatic ratio D. Inhibitory ratio	1. 9 : 7 2. 9 : 3 : 4 3. 12 : 3 : 1 4. 13 : 3

1. A-4 B-1 C-2 D-3
2. A-1 B-2 C-3 D-4
3. A-4 B-1 C-2 D-3
4. A-1 B-3 C-2 D-4

172.

Which of the following sequences represent a possible pathway in the production of a secretory protein?

1. Rough ER $\overset{}{\to}$ Secretory vesicle $\overset{}{\to}$ Ribosome $\overset{}{\to}$ Golgi apparatus
2. Ribosome $\overset{}{\to}$ Rough ER $\overset{}{\to}$ Golgi apparatus $\overset{}{\to}$ Secretory vesicle
3. Secretory vesicle $\overset{}{\to}$ Golgi apparatus - $\overset{}{\to}$ Ribosomes $\overset{}{\to}$ Rough ER
4. Rough ER $\overset{}{\to}$ Ribosomes $\overset{}{\to}$ Secretory vesicles $\overset{}{\to}$ Golgi apparatus

173.

A connecting link between plant and animal Kingdom is

1. Paramecium
2. Chlamydomonas
3. Chlorella
4. Euglena

174.

Which of the following statements is false regarding SDS-polyacrylamide gel electrophoresis?

1. Proteins are separated by molecular weight
2. SDS is a detergent which gives charge to protein
3. Large protein moves more slowly through the gel
4. SDS is used to maintain the 3-dimensional structure of protein

175.

If the free energy change of a reaction is greater than zero, then the reaction is

1. Spontaneous
2. Non-spontaneous
3. At equilibrium
4. Endothermic

176.

Organisms who are able to freely interbreed producing fertile offspring and having similar blue print for making this organism are referred to as

1. Species
2. Tribe
3. Genus
4. Sub-genus

177.

The enzyme hexokinase which catalysis glucose to a glucose-6-phosphate in glycolysis is inhibited by glucose-6-phosphate. This is an example of
I. competitive inhibition
II. Non-competitive inhibition
III. Feedback allosteric inhibition
Which of the following statements is/are correct?

1. I and II
2. I and II
3. Only III
4. All of these

178.

The protein of tumor suppressor gene may

1. Be present in non-cancerous cells
2. Cause signal cell death
3. Regulate the cell cycle
4. Both 1 and 3

179.

The mitotic cell division is divided typically into four phases; G₁, S, G₂ and M. considering a mitotic cycle time of 18 hours; the distribution of period of time (in hrs.) for each of these phases will be

1. G₁-1 S-3 G₂-5 M-9
2. G₁-9 S-1 G₂-3 M-5
3. G₁-9 S-5 G₂-3 M-1
4. G₁-3 S-5 G₂-9 M-1

180.

Match the following Column I with Column II

Column I	Column II
A. Carcinogen B. Anaphase-I C. Mitosis D. Zygotene	1. Cancerous tumour 2. Disjunction 3. Synapse 4. Plectonemic coiling

1. A-1 B-2 C-4 D-3

2. A-3 B-1 C-4 D-2
3. A-2 B-3 C-1 D-4
4. A-4 B-1 C-3 D-2

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