Solved papers for Haryana PMT Haryana PMT Solved Paper-2010

done Haryana PMT Solved Paper-2010

  • question_answer1) A steel ball of mass 0.1 kg falls freely from a height of 10 m and bounces to a height of 5.4 m from the ground. If the dissipated energy in this process is absorbed by the ball, the rise in its temperature is (specific heat of steel = 460 J-kg \[^{-10}{{C}^{-1}},g=10m{{s}^{-2}}\]

    A) \[{{0.01}^{0}}C\]

    B) \[{{0.1}^{0}}C\]

    C) \[{{1}^{0}}C\]

    D) \[{{1.1}^{0}}C\]

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  • question_answer2) The fundamental frequency of a closed pipe is 220 Hz. If \[\frac{1}{4}\] of the pipe is filled with water, the frequency of the first overtone of the pipe now is

    A) 220 Hz

    B) 440 Hz

    C) 880 Hz

    D) 1760 Hz

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  • question_answer3) Two point charges -q and +q/2 are situated at the origin and at the point (a, 0, 0) respectively. The point along the X-axis where the electric field vanishes is

    A) \[x=\frac{a}{\sqrt{2}}\]

    B) \[x=\sqrt{2a}\]

    C) \[x=\frac{\sqrt{2a}}{\sqrt{2-1}}\]

    D) \[x=\frac{\sqrt{2a}}{\sqrt{2+1}}\]

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  • question_answer4) The radii of the inner and outer spheres of a condenser are 9 cm and 10 cm respectively. If the dielectric constant of the medium between the two spheres is 6 and charge on the inner sphere is 18 x 10-9 C, then the potential of inner sphere will be, if the outer sphere is earthed

    A) 180V

    B) 30V

    C) 18V

    D) 90V

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  • question_answer5) A battery is connected to a uniform resistance wire AB and B is earthed. Which one of the following graphs below shows how the current density J varies along AB?





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  • question_answer6) A moving coil galvanometer is converted into an ammeter reading up to 0.03 A by connecting a shunt of resistance 4r across it. and into an ammeter reading up to 0.06 A when a shunt of resistance r is connected across it. What is the maximum current which can be sent through this galvanometer if no shunt is used?

    A) 0.01 A

    B) 0.02 A

    C) 0.03 A

    D) 0.04 A

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  • question_answer7) A capillary tube is attached horizontally to a constant head arrangement. If the radius of the capillary tube is increased by 10%, then the rate of flow of liquid will change nearly by

    A) +10%

    B) + 46%

    C) -10%

    D) - 40%

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  • question_answer8) To break a wire of 1 m length, minimum 40 kg weight is required. Then the wire of the same material of double radius and 6 m length will require breaking

    A) 80 kg weight

    B) 240 kg weight

    C) 200 kg weight

    D) 160 kg weight

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  • question_answer9) A bullet of mass m moving with velocity v strikes a suspended wooden block of mass M. If the block rises to a S haight the initial velocity of the block will be

    A) \[\sqrt{2gh}\]

    B) \[\frac{m+m}{m}\sqrt{2gh}\]

    C) \[\frac{m}{M+m}2gh\]

    D) \[\frac{M+m}{M}\sqrt{2gh}\]

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  • question_answer10) A hydrogen atom emits a photon corresponding to an electron transition from n = 5 to n = 1. The recoil speed of hydrogen atom is almost (mass of proton \[\approx 1.6\times {{10}^{-27}}kg)\]

    A) \[10m{{s}^{-1}}\]

    B) \[2\times {{10}^{-2}}m{{s}^{-1}}\]

    C) \[4m{{s}^{-1}}\]

    D) \[8\times {{10}^{2}}m{{s}^{-1}}\]

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  • question_answer11) Numbers of nuclei of a radioactive substance at time t = 0 are 1000 and 900 at time t = 4 s. Then number of nuclei at time t = 2 s. will be

    A) 800

    B) 810

    C) 790

    D) 700

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  • question_answer12) In transistor, forward bias is always smaller than the reverse bias. The correct reason is

    A) to avoid excessive heating of transistor

    B) to maintain a constant base current

    C) to produce large voltage gain

    D) None of the above

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  • question_answer13) A body falls freely from the top of a tower. It covers 36% of the total height in the last second before striking the ground level. The height of the tower is

    A) 50m

    B) 75m

    C) 100m

    D) 125m

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  • question_answer14) For any two vectors \[\overrightarrow{\text{A}}\]and \[\overrightarrow{\text{B}},\]if \[\overrightarrow{\text{A}}.\]\[\overrightarrow{\text{B}}=\]\[|\overrightarrow{\text{A}}\text{ }\!\!\times\!\!\text{ }\overrightarrow{\text{B}}|,\]is equal to

    A) \[\sqrt{{{A}^{2}}+{{B}^{2}}}\]

    B) \[A+B\]

    C) \[\sqrt{{{A}^{2}}+{{B}^{2}}+\frac{AB}{\sqrt{2}}}\]

    D) \[\sqrt{{{A}^{2}}+{{B}^{2}}+\sqrt{2}AB}\]

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  • question_answer15) A particle is projected with a velocity v such that its range on the horizontal plane is twice the greatest height attained by it. The range of the projectile is (where g is acceleration due to gravity)

    A) \[\frac{4{{v}^{2}}}{5g}\]

    B) \[\frac{4g}{5{{v}^{2}}}\]

    C) \[\frac{{{v}^{2}}}{g}\]

    D) \[\frac{4{{v}^{2}}}{\sqrt{{}}5g}\]

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  • question_answer16) A body of mass 10 kg slides along a rough horizontal surface. The coefficient of friction is I\[1/\sqrt{3}\]. Taking g = \[10m/{{s}^{2}},\] the least force which acts at an angle of 30? to the horizontal is

    A) 25 N

    B) 100 N

    C) 50 N

    D) \[\frac{50}{\sqrt{3}}N\]

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  • question_answer17) When a uniform solid sphere and a disc of the same mass and of the same radius roll down an inclined smooth plane from rest to the same distance, then the ratio of the times taken by them is

    A)  15 : 14                                 

    B)  \[{{15}^{2}}:{{14}^{2}}\]

    C)  \[\sqrt{14} :\sqrt{15}\]                            

    D)  14:15

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  • question_answer18) The mass of the moon is \[\frac{1}{81}\] of the earth but gravitational pull is -\[\frac{1}{6}\]of the earth. It is due to the fact that

    A) the radius of the moon is \[\frac{81}{6}\] of the earth

    B) the radius of the earth is \[\frac{9}{\sqrt{6}}\] of the moon

    C) moon is the satellite of the earth

    D) None of the above

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  • question_answer19) If the work done in blowing a bubble of volume V is W, then the work done in blowing the bubble of volume 2 V from the same soap solution will be

    A) W/2

    B) \[\sqrt{2}W\]

    C) \[\sqrt[3]{2}W\]

    D) \[\sqrt[3]{4}W\]

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  • question_answer20) Air is filled at \[60{}^\circ C\] in a vessel of open mouth. The vessel is heated to a temperature T so that 1/4th part of air escapes. Assuming the volume of the vessel remaining constant, the value of T is

    A) \[80{}^\circ C\]

    B) \[444{}^\circ C\]

    C) \[333{}^\circ C\]

    D) \[171{}^\circ C\]

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  • question_answer21) A gas expands with temperature according to the relation \[V=K{{T}^{2/3}}.\] what is the work done when the temperature changes by 30?C?

    A) 10 R

    B) 20 R

    C) 30 R

    D) 40 R

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  • question_answer22) There are two spherical balls A and B of the same material with same surface, but the diameter of A is half that of B. If A and B are heated to the same temperature and then allowed to cool, then

    A) rate of cooling is same in both

    B) rate of cooling of A is four times that of B

    C) rate of cooling of A is twice that of B

    D) rate of cooling of A is \[\frac{1}{4}\] times that of B

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  • question_answer23) A pendulum has time period T in air when it is made to oscillate in water, it acquired a time period T=\[\sqrt{2}\]T. The density of the pendulum bob is equal to (density of water =1)

    A) \[\sqrt{2}\]

    B) 2

    C) \[2\sqrt{2}\]

    D) None of these

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  • question_answer24) 24. Total surface area of a cathode is \[0.05\text{ }{{m}^{2}}\] and 1 A current passes through it for 1 h. Thickness of nickel deposited on the cathode is (given that density of nickel = 9 g/cc and its \[ECE=3.04\times {{10}^{-~~4}}g/C\])

    A) 2.4m

    B) 2.4 \[\mu \]m

    C) 2.4 mm

    D) None of these

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  • question_answer25) Two bulbs consume same power when operated at 200 V and 300 V respectively. When these bulbs are connected in series across a DC source of 500 V, then

    A) ratio of potential differences across them is 3/2

    B) ratio of potential differences across them is 9/4

    C) ratio of powers consumed across them is 4/9

    D) ratio of powers consumed across them is 2/3

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  • question_answer26) A winding wire which is used to frame a solenoid can bear a maximum 10 A current. If length of solenoid is 80 cm and its cross-sectional radius is 3 cm then required length of winding wire is (B = 0.2 T)

    A) \[1.2\times {{10}^{2}}m\]

    B) \[4.8\times {{10}^{2}}m\]

    C) \[2.4\times {{10}^{3}}m\]

    D) \[6\times {{10}^{3}}m\]

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  • question_answer27) A wire of length L is bent in the form of a circular coil and current i is passed through it. If this coil is placed in a magnetic field then the torque acting on the coil will be maximum when the number of turns is

    A) as large as possible

    B) any number

    C) 2

    D) 1

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  • question_answer28) The magnetic moment produced in a substance of 1 g is \[6\times {{10}^{-7}}{{A}^{-}}{{m}^{2}}.\] If its density is \[5\text{ }g/c{{m}^{3}},\] then the intensity of magnetization in A/m will be

    A) \[8.3\times {{10}^{6}}\]

    B) \[3.0\]

    C) \[1.2\times {{10}^{-7}}\]

    D) \[3\times {{10}^{-}}^{6}\]

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  • question_answer29) A coil of Cu wire (radius r, self-inductance L) is bent in two concentric turns each having radius \[\frac{r}{2.}\] The self-inductance is now

    A) 2L

    B) L

    C) 4L

    D) \[\frac{L}{2.}\]

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  • question_answer30) In an L-C-R circuit R=100\[\Omega \]. When capacitance C is removed, the current lags behind the voltage by \[\frac{\pi }{3}.\], when inductance L is removed, the current leads the voltage by \[\frac{\pi }{3}.\], The impedance of the circuit is

    A) 50 \[\Omega \]

    B) 100 \[\Omega \]

    C) 200 \[\Omega \]

    D) 400 \[\Omega \]

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  • question_answer31) If maximum velocity with which an electron can be emitted from photo-cell is \[4\times {{10}^{8}}cm/s,\] the stopping potential is (mass of electron \[=9\times {{10}^{-}}^{31}kg\])

    A) 30V

    B) 45V

    C) 59V

    D) Information is insufficient

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  • question_answer32) If the momentum of an electron is changed by \[\Delta p\] then the de-Broglie wavelength associated with it changes by 0.50%. The initial momentum of electron will be

    A) \[\frac{\Delta p}{200}\]

    B) \[\frac{\Delta p}{199}\]

    C) \[199\Delta p\]

    D) \[400\Delta p\]

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  • question_answer33) For characteristic X-ray some material

    A) \[E({{K}_{\gamma }})<E({{K}_{\beta }})<E({{K}_{\alpha }})\]

    B) \[E({{K}_{\alpha }})<E({{L}_{\beta }})<E({{M}_{\alpha }})\]

    C) \[\lambda ({{K}_{\gamma }})<\lambda ({{K}_{\beta }})<\lambda ({{K}_{\alpha }})\]

    D) \[\lambda ({{M}_{\alpha }})<\lambda ({{L}_{\alpha }})<\lambda ({{K}_{\alpha }})\]

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  • question_answer34) A convergent beam of light is incident on a convex mirror so as to converge to a distance 12 cm from the pole of the mirror. An inverted image of the same size is formed coincident with the virtual object. What is the focal length of the mirror?

    A) 24cm

    B) 12cm

    C) 6 cm

    D) 3 cm

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  • question_answer35) When a ray is refracted from one medium to another, the wavelength changes from \[6000\overset{\text{o}}{\mathop{\text{A}}}\,\] to \[4000\overset{\text{o}}{\mathop{\text{A}}}\,\]. The critical angle for the interface will be

    A)  \[{{\cos }^{-1}}\left( \frac{2}{3} \right)\]                              

    B)  \[{{\cos }^{-1}}\left( \frac{2}{\sqrt{3}} \right)\]

    C)  \[{{\cos }^{-1}}\left( \frac{2}{3} \right)\]                              

    D)  \[{{\cos }^{-1}}\left( \frac{2}{\sqrt{3}} \right)\]

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  • question_answer36) A telescope using light having wavelength \[5000\overset{\text{o}}{\mathop{\text{A}}}\,\] and using lenses of focal lengths 2.5 cm and 30 cm. If the diameter of the aperture of the objective is 10 cm, then the resolving limit of telescope is

    A) \[6.1\times {{10}^{-6}}rad\]

    B) \[5.0\times {{10}^{-6}}rad\]

    C) \[8.3\times {{10}^{-4}}rad\]

    D) \[7.3\times {{10}^{-3}}rad\]

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  • question_answer37) Light of wavelength 500 nm is used to form interference pattern in Youngs double slit experiment. A uniform glass plate of refractive index 1.5 and thickness 0.1 mm is introduced in the path of one of the interfering beams. The number of fringes which will shift the cross-wire due to this is

    A) 100

    B) 200

    C) 300

    D) 400

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  • question_answer38) A screen is placed 50 cm from a single slit, which is illuminated with \[6000\overset{\text{o}}{\mathop{\text{A}}}\,\] light. If distance between the first and third minima in the diffraction pattern is 3 mm, the width of the slit is

    A) 0.1mm

    B) 0.2mm

    C) 0.3 mm

    D) 0.4 mm

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  • question_answer39) An optical fibre communication system works on a wavelength of 1.3 \[\mu \]m. The number of subscribers it can feed if a channel requires 20 kHz are

    A) \[2.3\times {{10}^{10}}\]

    B) \[1.15\times {{10}^{10}}\]

    C) \[1\times {{10}^{5}}\]

    D) None of these

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  • question_answer40) When the angle of incidence on a material is \[60{}^\circ \], the reflected light is completely polarized. The velocity of the refracted ray inside the material is (in ms-1)

    A) \[3\times {{10}^{8}}\]

    B) \[\left( \frac{3}{\sqrt{2}} \right)\times {{10}^{8}}\]

    C) \[\sqrt{3}\times {{10}^{8}}\]

    D) \[0.5\times {{10}^{8}}\]

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  • question_answer41) Which of the following waves has the maximum wavelength?

    A) X-rays

    B) IR rays

    C) UV rays

    D) Radio waves

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  • question_answer42) In a parallel plate capacitor the separation between the plates is 3 mm with air between them. Now a 1 mm thick layer of a material of dielectric constant 2 is introduced between the plates due to which the capacity increases. In order to bring its capacity to the original value the separation between the plates must be made

    A) 1.5 mm

    B) 2.5 mm

    C) 3.5 mm

    D) 4.5 mm

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  • question_answer43) From the dimensional consideration which of the following equations is correct?

    A) \[T=2\pi \sqrt{\frac{{{R}^{3}}}{GM}}\]

    B) \[T=2\pi \sqrt{\frac{GM}{{{R}^{3}}}}\]

    C) \[T=2\pi \sqrt{\frac{GM}{{{R}^{2}}}}\]

    D) \[T=2\pi \sqrt{\frac{{{R}^{2}}}{GM}}\]

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  • question_answer44) Two masses of 10 kg and 20 kg respectively are connected by a massless spring as shown in figure. A force of 200 N acts on the 20 kg mass. A: the instant shown, the 10 kg mass has acceleration \[12\text{ }m/{{s}^{2}}.\] What is the acceleration of 20 kg mass?

    A) \[12m/{{s}^{2}}\]

    B) \[~4m/{{s}^{2}}\]

    C) \[10m/{{s}^{2}}\]

    D) Zero

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  • question_answer45) Under a constant pressure head, the rate of flow of liquid through a capillary tube is V. If the length of the capillary tube is doubled and the diameter of the bore is halved, the rate of flow would become

    A) \[\frac{V}{4}\]

    B) 16 V

    C) \[\frac{V}{8}\]

    D) (d\[\frac{V}{12}\]

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  • question_answer46) Identify the vitamin whose deficiency causes pernicious anaemia in humans.

    A) vitamin-\[{{B}_{1}}\]

    B) vitamin-\[{{B}_{12}}\]

    C) vitamin-\[{{B}_{2}}\]

    D) vitamin-K

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  • question_answer47) Sodium metal crystallizes in body centred cubic lattice with cell edge \[4.29\overset{\text{o}}{\mathop{\text{A}}}\,\]. What is the radius of sodium atom?

    A) \[1.48\overset{\text{o}}{\mathop{\text{A}}}\,\]

    B) \[2.43\overset{\text{o}}{\mathop{\text{A}}}\,\]

    C) \[1.51\overset{\text{o}}{\mathop{\text{A}}}\,\]

    D) \[1.86\overset{\text{o}}{\mathop{\text{A}}}\,\]

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  • question_answer48) The concentration of hydronium ions in a cup of black coffee is \[1.3\times {{10}^{-5}}M\]. What will be the pH of the coffee?

    A) \[4.89\]

    B) \[3.89\]

    C) \[2.20\]

    D) None of these

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  • question_answer49) At \[450K\], \[{{K}_{p}}=2.0\times {{10}^{10}}\]/bar for the given reaction at equilibrium \[2S{{O}_{2}}(g)+{{O}_{2}}(g)2S{{O}_{3}}(g)\] What is \[{{K}_{c}}\] at this temperature?

    A) \[73.8\times {{10}^{10}}\]

    B) \[7.38\times {{10}^{11}}\]

    C) Both (a) and (b)

    D) Zero

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  • question_answer50) The rate constant for a first order reaction is \[60{{s}^{-1}}\]. How much time it will take to reduce the concentration of the reactant to \[1/{{10}^{th}}\] of its initial value?

    A) \[3.8\times {{10}^{-2}}s\]

    B) \[1.26\times {{10}^{13}}s\]

    C) \[2.01\times {{10}^{13}}s\]

    D) \[1.097\times {{10}^{3}}\]

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  • question_answer51) Gold numbers of protective colloids A, B, C and D are \[0.50\], \[0.01\], \[0.10\]and \[0.005\] respectively. The correct order of their protective power is

    A) \[D<A<C<B\]

    B) \[C<B<D<A\]

    C) \[A<C<B<D\]

    D) \[B<D<A<C\]

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  • question_answer52) In the following sequence of reactions, the alkene gives the compound B. B is \[C{{H}_{3}}-CH=CH-C{{H}_{3}}\xrightarrow{{{O}_{3}}}A\xrightarrow{{{H}_{2}}O/Zn}B\]

    A) \[C{{H}_{3}}C{{H}_{2}}CHO~\]

    B) \[C{{H}_{3}}\text{ }C{{H}_{3}}\]

    C) \[C{{H}_{3}}C{{H}_{2}}COC{{H}_{3}}\]

    D) \[C{{H}_{3}}CHO\]

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  • question_answer53) Nylon-6 6 is obtained from

    A) adipic acid and hexamethylene diamine

    B) tetrafluoroethylene

    C) vinyl cyanide

    D) vinyl benzene

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  • question_answer54) The correct order of acidity is

    A) \[HClO<HCl{{O}_{2}}<HCl{{O}_{3}}<HCl{{O}_{4}}\]

    B) \[HCl{{O}_{4}}<HCl{{O}_{3}}<HCl{{O}_{2}}<HClO\]

    C) \[HClO<HCl{{O}_{4}}<HCl{{O}_{3}}<HCl{{O}_{2}}\]

    D) \[HCl{{O}_{4}}<HCl{{O}_{2}}<HCl{{O}_{3}}<HClO\]

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  • question_answer55) Which of the following amines gives carbylamine reaction?

    A) \[{{({{C}_{2}}{{H}_{5}})}_{2}}NH\]

    B) \[{{({{C}_{2}}{{H}_{5}})}_{3}}N\]

    C) \[C{{H}_{3}}NH{{C}_{6}}{{H}_{5}}\]

    D) \[{{C}_{2}}{{H}_{5}}N{{H}_{2}}\]

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  • question_answer56) Toluene is nitrated and the resulting product is reduced with tin and hydrochloric acid. The product so obtained is diazotised and then heated with cuprous bromide. The reaction mixture so formed contains

    A) mixture of o-and-p-bromotoluenes

    B) mixture of o-and p-dibromobenzene

    C) mixture of o-and p-bromoaniline

    D) mixture of o-and m-bromotoluenes

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  • question_answer57) Which of the following is least volatile?

    A) \[{{H}_{2}}O\]

    B) \[{{H}_{2}}S\]

    C) \[{{H}_{2}}Se\]

    D) \[{{H}_{2}}Te\]

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  • question_answer58) The type of hybridisation of carbon atom in graphite, diamond and Buckminster fullerene are respectively

    A) \[s{{p}^{3}}\], \[s{{p}^{3}}\]and \[s{{p}^{2}}\]

    B) \[sp\], \[s{{p}^{2}}\] and \[s{{p}^{2}}\]

    C) \[s{{p}^{2}}\], \[s{{p}^{3}}\] and \[s{{p}^{2}}\]

    D) \[s{{p}^{2}}\], \[s{{p}^{3}}\] and \[s{{p}^{3}}\]

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  • question_answer59) Calculate the mass of urea \[(N{{H}_{2}}CON{{H}_{2}})\] required in making \[2.5kg\]of \[0.25\text{ }molal\] aqueous solution.

    A) \[37.5\text{ }g\]

    B) \[73.5\text{ }g\]

    C) \[53.7\text{ }g\]

    D) \[75.3\text{ }g\]

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  • question_answer60) What is the mole fraction of benzene in solution containing 30% by mass in carbon tetrachloride?

    A) \[1.459\]

    B) \[0.459\]

    C) \[4.159\]

    D) None of these

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  • question_answer61) The conductivity of \[0.20M\text{ }KCl\]solution at \[298\text{ }K\]is \[0.0248S\text{ }c{{m}^{-1}}\]. What will be its molar conductivity?

    A) \[124S\text{ }c{{m}^{2}}\]

    B) \[124c{{m}^{-1}}\]

    C) \[124\text{ }oh{{m}^{-1}}\text{ }c{{m}^{2}}\text{ }equi{{v}^{-1}}\]

    D) \[124S\text{ }c{{m}^{2}}\text{ }mo{{l}^{-1}}\]

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  • question_answer62) Chemical formula of rust is

    A) \[F{{e}_{2}}{{O}_{3}}\text{.}{{\text{H}}_{2}}O~\]

    B) \[F{{e}_{2}}{{O}_{3}}\text{.5}{{\text{H}}_{2}}O~\]

    C) \[F{{e}_{2}}{{O}_{3}}\text{.x}{{\text{H}}_{2}}O~\]

    D) None of these

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  • question_answer63) What will be the half-life period of a first order reaction with rate constant\[k=5.5\times {{10}^{-14}}{{s}^{-1}}\]?

    A) \[1.26\times {{10}^{13}}s\]

    B) \[2.16\times {{10}^{13}}s\]

    C) \[1.26\times {{10}^{-13}}s\]

    D) \[2.16\times {{10}^{-13}}s\]

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  • question_answer64) Ozone can be tested by

    A) \[Ag\]

    B) \[Hg\]

    C) \[Zn\]

    D) \[Au\]

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  • question_answer65) The number of \[\sigma \]-bond \[{{P}_{4}}{{O}_{10}}\] is

    A) \[6\]

    B) \[16\]

    C) \[20\]

    D) \[7\]

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  • question_answer66) The IUPAC name of the complex \[[Pt{{(N{{H}_{3}})}_{3}}Br(N{{O}_{2}})Cl]Cl\] is

    A) triamminechlorobromonitroplatinum (IV) chloride

    B) triamminebromonitrochloroplatinum (IV) chloride

    C) triamminebromochloronitroplatinum (IV) chloride

    D) triamminenitrochlorobromoplatinum (IV) chloride

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  • question_answer67) Nitrogen has the electronic configuration \[1{{s}^{2}},2{{s}^{2}},2p_{x}^{1}2p_{y}^{1}2p_{z}^{1}\] and not \[1{{s}^{2}},2{{s}^{2}},2p_{x}^{2}2p_{y}^{1}2p_{z}^{0}\], which is determined by

    A) Pauli exclusion principle

    B) Aufbau principle

    C) Hunds rule

    D) Uncertainty principle

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  • question_answer68) Which one of the following is correct order of the size?

    A) \[I>{{I}^{-}}>{{I}^{+}}\]

    B) \[I>{{I}^{+}}>{{I}^{-}}\]

    C) \[{{I}^{+}}>{{I}^{-}}>I\]

    D) \[{{I}^{-}}>I>{{I}^{+}}\]

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  • question_answer69) The number of antibonding electron pair in \[O_{2}^{2-}\] molecular ion on the basis of molecular orbital theory is (atomic no. of \[O=8\])

    A) \[2\]

    B) \[3\]

    C) \[4\]

    D) \[5\]

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  • question_answer70) What will be the enthalpy of combustion of ethylene (gas) to form \[C{{O}_{2}}\] (gas) and water at \[298\text{ }K\]and 1 atm pressure? The enthalpies of formation of \[C{{O}_{2}}\], \[{{H}_{2}}O\] and \[{{C}_{2}}{{H}_{4}}\] are \[-393.5,\] \[-241.8,\] \[+52.3\text{ }kJ/mol\] respectively.

    A) \[-1332.9\,kJ\,mo{{l}^{-1}}\]

    B) \[-1322.9\,kJ\,mo{{l}^{-1}}\]

    C) \[+1332.9kJ\,mo{{l}^{-1}}\]

    D) \[+1322.9kJ\,mo{{l}^{-1}}\]

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  • question_answer71) For the process to occur under adiabatic conditions, the correct condition is

    A) \[\Delta T=0\]

    B) \[\Delta p=0\]

    C) \[q=0\]

    D) \[W=0\]

    View Answer play_arrow
  • question_answer72) What is heavy water?

    A) \[H_{2}^{18}O\]

    B) \[H_{2}^{16}O\]

    C) \[{{H}_{2}}{{O}_{3}}\]

    D) \[{{D}_{2}}O\]

    View Answer play_arrow
  • question_answer73) How many primary amines are possible for the formulae \[{{C}_{4}}{{H}_{11}}N\]?

    A) \[1\]

    B) \[2\]

    C) \[3\]

    D) \[4\]

    View Answer play_arrow
  • question_answer74) Which of the following alkaline earth metal sulphates is least soluble in water?

    A) \[BaS{{O}_{4}}~\]

    B) \[MgS{{O}_{4}}~\]

    C) \[SrS{{O}_{4}}\]

    D) \[CaS{{O}_{4}}\]

    View Answer play_arrow
  • question_answer75) The IUPAC name for the hydrocarbon represented by swastik sign is

    A) neo-nonane

    B) tetraethyl carbon

    C) 2-ethylpentane

    D) 3, 3-diethylpentane

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  • question_answer76) In Friedel-Crafts alkylation, besides \[AlC{{l}_{3}}\], the other reactants are

    A) \[{{C}_{6}}{{H}_{6}}+N{{H}_{3}}\]

    B) \[{{C}_{6}}{{H}_{6}}+C{{H}_{4}}\]

    C) \[{{C}_{6}}{{H}_{6}}+C{{H}_{3}}Cl\]

    D) \[{{C}_{6}}{{H}_{6}}+C{{H}_{3}}COCl\]

    View Answer play_arrow
  • question_answer77) The reaction,\[RX+2Na+RX\xrightarrow{Dry\,ether}R-R+2NaX\]is called

    A) Sand Meyers reaction

    B) Wurtz reaction

    C) Fitting reaction

    D) Williamsons synthesis

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  • question_answer78) In Lucas test an alcohol react immediately and gives insoluble chloride. The alcohol is

    A) \[C{{H}_{3}}OH\]

    B) \[C{{H}_{3}}C{{H}_{2}}OH\]

    C) \[{{(C{{H}_{3}})}_{2}}CHOH\]

    D) \[{{(C{{H}_{3}})}_{3}}COH\]

    View Answer play_arrow
  • question_answer79) Clemmensens reduction of ketone is carried out in

    A) \[{{H}_{2}}\] with Pd catalyst

    B) glycerol with \[KOH\]

    C) \[LiAl{{H}_{4}}\] with water

    D) \[Zn-Hg\]with \[HCl\]

    View Answer play_arrow
  • question_answer80) Which of the following compounds is most acidic?

    A) \[BrC{{H}_{2}}COOH\]

    B) \[ClC{{H}_{2}}COOH\]

    C) \[FC{{H}_{2}}COOH\]

    D) \[IC{{H}_{2}}COOH\]

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  • question_answer81) Hydrolysis of HCN gives

    A) acetic acid

    B) alcohol

    C) formaldehyde

    D) formic acid

    View Answer play_arrow
  • question_answer82) Identify Y.

    A) benzophenone

    B) acetophenone

    C) benzoic acid

    D) phenol

    View Answer play_arrow
  • question_answer83) \[RCOOH\xleftarrow{{{H}_{3}}{{O}^{+}}}X\xrightarrow{[H]}RC{{H}_{2}}N{{H}_{2}}\]Identify the X in the above sequence.

    A) Alkane nitrile

    B) Alkyl is nitrile

    C) Aldoxime

    D) Alkyl nitrile

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  • question_answer84) Aldehyde are the first oxidation product of

    A) primary alcohol

    B) secondary alcohol

    C) tertiary alcohol

    D) dihydric alcohols

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  • question_answer85) In Carius method of estimation of halogens, \[0.099g\]organic compound gave \[0.287g\] \[AgCl\]. The percentage of chlorine in the compound will be

    A) \[28.6\]

    B) \[71.7\]

    C) \[35.4\]

    D) \[64.2\]

    View Answer play_arrow
  • question_answer86) Which one of the following compounds gives aspirin on reacting with acetic anhydride in presence of\[{{H}_{2}}S{{O}_{4}}\]?





    View Answer play_arrow
  • question_answer87) 3-pentanol is an example of

    A) primary alcohol

    B) secondary alcohol

    C) tertiary alcohol

    D) aromatic alcohol

    View Answer play_arrow
  • question_answer88) Which of the following is not correct? White phosphorus \[({{P}_{4}})\] has

    A) six \[P-P\] single bonds

    B) four \[P-P\] single bonds

    C) four lone pair of electrons

    D) PPP angle is \[{{60}^{o}}\]

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  • question_answer89) Which is the isotones of \[_{32}G{{e}^{76}}\]?

    A) \[_{32}G{{e}^{77}}\]

    B) \[_{34}S{{e}^{78}}\]

    C) \[_{36}K{{r}^{79}}\]

    D) \[_{32}G{{e}^{78}}\]

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  • question_answer90) What is the ratio of \[\pi \]-and \[\sigma \]-bonds in benzene?

    A) \[1:4\]

    B) \[2:1\]

    C) \[1:1\]

    D) \[2:2\]

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  • question_answer91) In simple epithelium, the cells are

    A) continuously dividing to provide cells for forming an organ

    B) hardened to provide support to the organs

    C) loosely connected to one another to form an irregular layer

    D) cemented directly to one another to form a single layer

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  • question_answer92) One function of telomeres in a chromosome is to

    A) seal the ends of the chromosomes

    B) help two chromatids to move towards poles

    C) starts RNA synthesis

    D) identify the correct member of the homologous pair of chromosome

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  • question_answer93) The length of one turn of the helix in B-form DNA is approximately

    A) 0.34 nm

    B) 20 nm

    C) 2nm

    D) 3.4 nm

    View Answer play_arrow
  • question_answer94) A research scholar once collected certain alga and found that its cells contained chlorophyll-a, chlorophyll-d and phycoerythrin. The alga must belong to

    A) Chlorophyceae

    B) Rhodophyceae

    C) Bacillariophyceae

    D) Cyanophyceae

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  • question_answer95) Eight nucleate embryo sacs are

    A) always bisporic

    B) always tetrasporic

    C) always monosporic

    D) sometimes monosporic, sometimes bisporic and sometime tetrasporic

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  • question_answer96) Double fertilization (or trbsle fusion) leading to initiation of endosperm in angiosperms, requires

    A) fusion of four or more polar nuclei and the second male gamete only

    B) fusion of two polar nuclei and second male gamete only

    C) fusion of one polar nucleus and second male gamete only

    D) all the above types of fusion in different types of angiosperms

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  • question_answer97) Industrial production of ethanol from starch is brought about by a certain species of

    A) Azotobacter

    B) Lactobacillus

    C) Saccharomyces

    D) Penicillium

    View Answer play_arrow
  • question_answer98) During replication of DNA, its two strands separate. Each of these serves as a template for the formation of new strands. Such type of replication is called

    A) non-conservative

    B) semi-conservative

    C) flexible

    D) conservative

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  • question_answer99) During cell division, the spindle fibres get attached to the condensing chromosome at a highly differentiated region. This region is called

    A) chromomere

    B) chromocentre

    C) centriole

    D) kinetochore

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  • question_answer100) Darwins finches provide an excellent evidence in favour of organic evolution. These are related to which of the following evidences?

    A) Embryology

    B) Palaeontology (or fossils)

    C) Anatomy

    D) Biogeography (or geographic distribution)

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  • question_answer101) In the life history of ferns, meiosis occurs at the time of

    A) formation of spores

    B) formation of antheridia and archegonia

    C) formation of gametes

    D) germination of spores

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  • question_answer102) Fixation of one molecule of \[C{{O}_{2}}\] through Calvin cycle requires

    A) 3 ATP and 3 \[NADP{{H}_{2}}\] molecules

    B) 3 ATP and 2 \[NADP{{H}_{2}}\] molecules

    C) 2 ATP and 1 \[NADP{{H}_{2}}\] molecules

    D) 1 ATP and 2\[NADP{{H}_{2}}\] molecules

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  • question_answer103) The plants growing in magnesium-deficient soil, but sprayed with urea would show

    A) deep green foliage

    B) loss of pigments in petals

    C) early flowering

    D) yellowing of leaves

    View Answer play_arrow
  • question_answer104) Special kinds of roots called pneumatophores are characteristics of the plants growing in

    A) sandy soils

    B) saline soils

    C) marshy places and salt lakes

    D) dryland regions

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  • question_answer105) Geocarpic fruits are produced by

    A) carrot

    B) onion

    C) ground nut

    D) watermelon

    View Answer play_arrow
  • question_answer106) Which one of the following characters studied by Mendel in garden pea was found to be dominant?

    A) Green seed colour

    B) Terminal flower position

    C) Green pod colour

    D) Wrinkled seed

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  • question_answer107) Coconut milk (coconut water) is widely used in tissue culture because it contains

    A) auxins

    B) ethylene

    C) cytokinin

    D) gibberellins

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  • question_answer108) What happens during vascularisation in plants?

    A) Differentiation of procambium followed by primary phloem and then primary xylem

    B) Differentiation of procambium, xylem and phloem simultaneously

    C) Differentation of procambium followed immediately by the development of secondary xylem and phloem

    D) Differentiation of procambium followed by the development of xylem and phloem

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  • question_answer109) Relative Biological Effectiveness (RBE) usually refers to the damages caused by

    A) low temperature

    B) high temperature

    C) radiation

    D) pollution

    View Answer play_arrow
  • question_answer110) Which one of the following is correctly matched pair of a certain plant family and its one example?

    A) Malvaceae - Cotton

    B) LeguiTunosae - Mango (or Sunflower)

    C) Cucurbitaceae - Orange

    D) Brassicaceae - Whezt

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  • question_answer111) Extranuclear DNA (genes) are located in

    A) lysosomes and chloroplasts

    B) Golgi complex and ribosomes

    C) chloroplasts and mitochondria

    D) ribosomes and mirorhondna

    View Answer play_arrow
  • question_answer112) RNA and DNA are similar in

    A) having similar sugars

    B) having similar pyrimidine bases

    C) being capable to replicate

    D) being polymers of nucleotides

    View Answer play_arrow
  • question_answer113) In three-dimensional view, a transfer RNA (tRNA) molecule appears

    A) Y-shaped

    B) S-shaped

    C) E-shaped

    D) L-shaped

    View Answer play_arrow
  • question_answer114) Anticodon is present on

    A) rRNA

    B) tRNA

    C) mtUDNA

    D) mRNA

    View Answer play_arrow
  • question_answer115) Zinc as a nutrient is used by the plants in the form of

    A) Zn

    B) \[Z{{n}^{2+}}\]

    C) ZnO

    D) \[ZnS{{O}_{4}}\]

    View Answer play_arrow
  • question_answer116) The triplet codon in mRNA which is usually the starting point for protein synthesis, is

    A) AUU

    B) AUG

    C) AUA

    D) AUC

    View Answer play_arrow
  • question_answer117) The first (initiating) step in photosynthesis is

    A) ionisation of water

    B) attachment of \[C{{O}_{2}}\]to 5-carbon sugar

    C) excitation of chlorophyll by a photon of light

    D) formation of ATP

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  • question_answer118) In most fungi, the food material is stored in the form of

    A) starch

    B) glucose

    C) sucrose

    D) glycogen

    View Answer play_arrow
  • question_answer119) The cell organelle involved in the glycosylation of proteins is

    A) ribosome

    B) peroxisome

    C) mitochondria

    D) endoplasmic reticulum

    View Answer play_arrow
  • question_answer120) Mutation generally produces

    A) recessive genes

    B) lethal genes

    C) polygenes

    D) dominant genes

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  • question_answer121) The replication of DNA is a pre-requisite for a eukaryotic cell to undergo division. During the cell cycle, the DNA replicates in

    A) S-phase

    B) \[{{G}_{1}}-\]phase

    C) \[{{G}_{2}}-\]phase

    D) M-phase

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  • question_answer122) In a given plant, red colour (R) of fruits is dominant over white fruit (r); and tallness (T) is dominant over dwarfness (t). If a plant with genotype RRTt is crossed with a plant of genotype rrtt, what will be the percentage of tall plants with red fruits in the next generation?

    A) 100%

    B) 25%

    C) 50%

    D) 75%

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  • question_answer123) The largest known ovules, largest male and female gametes, and largest plants are found among

    A) tree ferns and some monocots

    B) angiosperms

    C) gymnosperms

    D) dicotyledonous plants

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  • question_answer124) The greatest biomass of autotrophs in the worlds oceans is that of

    A) benthic brown algae, coastal red algae and daphnids

    B) benthic diatoms and marine viruses

    C) sea grasses and slime moulds

    D) free-floating micro-algae, cyanobacteria and nanoplankton

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  • question_answer125) A water ferm which is used as a green manure in rice fields is

    A) Salvinia

    B) Mucor

    C) Aspergillus

    D) Azolla

    View Answer play_arrow
  • question_answer126) Removal of apical (terminal) bud of a flowering plant (or pruning of a flowering plant) leads to

    A) formation of new apical buds

    B) formation of adventitious roots on the cut side

    C) early flowering (or stopping of floral growth)

    D) promotion of lateral branches

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  • question_answer127) An institution where valuable plant material likely to become irretrievably lost in the wild or in cultivation is preserved in a viable condition is known as

    A) genome

    B) gene library

    C) gene bank

    D) herbarium

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  • question_answer128) Black rust of wheat is caused by a member species of the genus

    A) Mucor

    B) Rhizopus

    C) Aspergillus

    D) Pucdnia

    View Answer play_arrow
  • question_answer129) Enzymes are absent in

    A) algae

    B) fungi

    C) cyanobacteria

    D) viruses

    View Answer play_arrow
  • question_answer130) For yielding one molecule of glucose, the Calvin cycle turns

    A) two times

    B) four times

    C) six times

    D) eight times

    View Answer play_arrow
  • question_answer131) ATP is a

    A) nucleotide

    B) nucleosome

    C) purine base

    D) nucleoside

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  • question_answer132) Feedback inhibition of an enzymatic reaction is caused by

    A) substrate

    B) enzyme

    C) end produce

    D) rise in temperature

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  • question_answer133) The correct sequence of plants in a hydrosere is

    A) Oak\[\to \]Lantana\[\to \]Scirpus\[\to \]Pistia\[\to \] Volvox

    B) Volvox \[\to \]Hydrilla \[\to \] Pistia \[\to \] Scirpus \[\to \]Lantana \[\to \]Oak

    C) Pistia\[\to \] Volvox \[\to \] Scirpus\[\to \] Hydrilla\[\to \]Oak \[\to \]Lantana

    D) Oak \[\to \] Lantana \[\to \] Volvox\[\to \] Hydnlla \[\to \]Pistia \[\to \]Scirpus

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  • question_answer134) Stroma in the chloroplasts of higher plants contains

    A) light-independent reaction enzymes

    B) light-dependent reaction enzymes

    C) ribosomes

    D) chlorophyll

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  • question_answer135) Mannitol is the stored food in of

    A) Chara

    B) Porphyra

    C) Fucus

    D) Gradltaria

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  • question_answer136) A young infant may be feeding entirely on mothers milk, which is white in colour but the tools, which the infant passes out is quite yellowish. This yellow colour is due to

    A) intestinal juice

    B) bile pigments passed through bile juice

    C) undigested milk protein casein

    D) pancreatic juice poured into duodenum

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  • question_answer137) Semi-conservative replication of DNA was first demonstrated in

    A) Drosophila melanogaster

    B) Escherichia coli

    C) Streptococcus pneumonia

    D) Salmonella typhimurium

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  • question_answer138) TO Diener discovered a

    A) free infectious RNA.

    B) free infectious DNA

    C) infectious protein

    D) bacteriophage

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  • question_answer139) Which of the following pairs is wrongly matched?

    A) Detergents - Lipase

    B) Alcohol - Nitrogenase

    C) Fruit juice - Pectinase

    D) Textile - Amylase

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  • question_answer140) A person likely to develop tetanus is immunised by administering

    A) dead germs

    B) apreformed antibodies

    C) wide spectrum antibiotics

    D) weakened germs

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  • question_answer141) Globulins contained in human blood plasma are primarily involved in

    A) defence mechanisms of body

    B) osmotic balance of body fluids

    C) oxygen transport in the blood

    D) clotting of blood

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  • question_answer142) What is not true for genetic code?

    A) A codon in mRNA is read in a non-contiguous fashion

    B) It is nearly universal

    C) It is degenerate

    D) It is unambiguous

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  • question_answer143) Which one of the following statements is correct?

    A) Patients, who had undergone surgery are given cannabinoids to relieve pain

    B) Benign tumours show the property of metastasis

    C) Heroin accelerates body functions

    D) Malignant tumours may exhibit metastasis

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  • question_answer144) Peripatus is a connecting link between

    A) Ctenophora and Platyhelminthes

    B) Mollusca and Echinodermata

    C) Annelida and Arthropoda

    D) Coelenterata and Porifera

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  • question_answer145) The letter T in T-lymphocyte refers to

    A) thyroid

    B) thalamus

    C) tonsil

    D) thymus

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  • question_answer146) The correct sequence of spermatogenetie stages leading to the formation of sperms in a mature human testis is

    A) spermatocyte-spermatogonia-spermatid -sperms

    B) spermatogonia-spermatocyte-spermatid -sperms

    C) spermatid-spennatocyte-spermatogonia -sperms

    D) spermatogonia-spermatid-spermatocyte -sperms

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  • question_answer147) Montreal Protocol aims at

    A) reduction of ozone depleting substances

    B) biodiversity conservation

    C) control of water pollution

    D) control of carbon dioxide emission

    View Answer play_arrow
  • question_answer148) DDT residues are rapidly passed through food chain causing biomagnification because DDT is

    A) lipo soluble

    B) moderately toxic

    C) non-toxic to aquatic animals

    D) water soluble

    View Answer play_arrow
  • question_answer149) Sickle cell anaemia is

    A) an autosomal linked dominant trait

    B) caused by substitution of valine by glutamic acid in the p-globulin chain of haemoglobin

    C) caused by a change in base pair of DNA

    D) characterised by elongated sickle like RBCs with a nucleus

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  • question_answer150) Removal of introns and joining the exons in a defined order in a transcription unit is called

    A) splicing

    B) tailing

    C) transformation

    D) capping

    View Answer play_arrow
  • question_answer151) What will happen if the stretch receptors of the urinary bladder wall are totally removed?

    A) Urine will not collect in the bladder

    B) Micturition will continue

    C) Urine will continue to collect normally in the bladder

    D) There will be no micturition

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  • question_answer152) The kind of tissue that forms the supportive structure in our pinnae (external ears) is also found in

    A) vertebrae

    B) nails

    C) ear ossicles

    D) tip of the nose

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  • question_answer153) Polyethylene glycol method is used for

    A) gene transfer without a vector

    B) biodiesel production

    C) seedless fruit production

    D) energy production from sewage

    View Answer play_arrow
  • question_answer154) Seminal plasma in human is rich in

    A) fructose, calcium and certain enzymes

    B) fructose and calcium but has no enzymes

    C) glucose and certain enzymes but has no calcium

    D) fructose and certain enzymes but poor in calcium

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  • question_answer155) Which of the following is a pair of viral diseases?

    A) Ringworm, AIDS

    B) Common cold, AIDS

    C) Dysentery, common cold

    D) Typhoid, tuberculosis

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  • question_answer156) Whose experiments cracked the DNA and discovered unequivocally that a genetic code is a triplet?

    A) Nirenberg and Mathaei

    B) Hershey and Chase

    C) Morgan and Sturtevant

    D) Beadle and Tatum

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  • question_answer157) In a standard ECG, which one of the following alphabets is the correct representation of the respective activity of the human heart?

    A) R-Repolarisation of ventricles

    B) S-Start of systole

    C) T-End of diastole

    D) P-Depolarisation of the atria

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  • question_answer158) Plasmodesmata are

    A) lignified cemented layers between cells

    B) locomotory structures

    C) membranes connecting the nucleus with plasmalemma

    D) connections between adjacent cells

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  • question_answer159) Use of anti-histamines and steroids give a quick relief from

    A) allergy

    B) nausea

    C) cough

    D) headache

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  • question_answer160) Which one of the following is the most likely reason of not occurring regular menstruation cycle in females?

    A) Fertilization of the ovum

    B) Maintenance of the hypertrophical endometrial lining

    C) Maintenance of high concentration of sex-hormones in the blood stream

    D) Retention of well-developed corpus luteum

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  • question_answer161) Alzheimer disease in humans is associated with the deficiency of

    A) dopamine

    B) glutamic acid

    C) acetylcholine

    D) gamma amino butyric acid (GABA)

    View Answer play_arrow
  • question_answer162) Which one of the following pairs of animal comprises jawless fishes?

    A) Lampreys and eels

    B) Mackerals and rohu

    C) Lampreys and hag fishes

    D) Guppies and hag fishes

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  • question_answer163) Phylogenetic system of classification is based on

    A) evolutionary relationships

    B) morphological features

    C) chemical constituents

    D) floral characters

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  • question_answer164) Which one of the following types of organisms occupy more than one trophic level in a pond ecosystem?

    A) Phytoplankton

    B) Fish

    C) Zooplankton

    D) Frog

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  • question_answer165) Cytoskeleton is made up of

    A) calcium carbonate granules

    B) callose deposits

    C) cellulosic microfibrils

    D) proteinaceous filaments

    View Answer play_arrow
  • question_answer166) Synapsis occurs between

    A) a male and a female gamete

    B) mRNA and ribosomes

    C) spindle fibres and centromere

    D) two homologous chromosomes

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  • question_answer167) Select the incorrect statement.

    A) Linkage is an exception to the principle or independent assortment in heredity

    B) Galactosemia is an inborn error of metabolism

    C) Small population size result in random generic drift in a population

    D) Baldness is a sex-limited trait

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  • question_answer168) Compared to blood our lymph has

    A) no plasma

    B) plasma without proteins

    C) more WBCs and RBCs

    D) more RBCs and less WBCs

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  • question_answer169) Which part of human brain is concerned with the regulation of body temperature?

    A) Medulla oblongata

    B) Cerebellum

    C) Cerebrum

    D) Hypothalamus

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  • question_answer170) The cell junctions called tight, adhering and gap junctions are found in

    A) muscular tissue

    B) connective tissue

    C) epithelial tissue

    D) neural tissue

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  • question_answer171) Which one of the following groups of animals is bilaterally symmetrical and triploblastic?

    A) Coelenterates (cnidarians)

    B) Aschelminthes (roundworms)

    C) Ctenophores

    D) Sponges

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  • question_answer172) The epithelial tissue present on the inner surface of bronchioles and Fallopian tubes is

    A) cuboidal

    B) glandular

    C) ciliated

    D) squamous

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  • question_answer173) Elbow joint is an example of

    A) pivot joint

    B) hinge joint

    C) gliding joint

    D) ball and socket joint

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  • question_answer174) Uric acid is the chief nitrogenous component of the excretory products of

    A) man

    B) earthworm

    C) cockroach

    D) frog

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  • question_answer175) Enzymes enhance the rate of a reaction by

    A) lowering the activation energy of the reaction

    B) combining with the product as soon as it is formed

    C) forming a reactant-product complex

    D) changing the equilibrium point of the reaction

    View Answer play_arrow
  • question_answer176) During organ differentiation in Drosophila, an organ is modified to another organ (such as wings may be replaced by legs). Genes responsible for such metamorphosis are called

    A) double dominant genes

    B) plastid genes

    C) complementary genes

    D) homeotic genes

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  • question_answer177) Which one pair of parents out of the following is most likely get a child who would suffer from hemolytic disease of the new-born?

    A) Rr+ mother and Rh‑ father

    B) Rh- mother and Rh- father

    C) Rh- mother and Rh+ father

    D) Rh- mother and Rh+ father

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  • question_answer178) Drosophila flies with XXY genotype are females, but human beings with such genotype are abnormal males. It shows that

    A) Y-chromosome is essential for sex determination in Drosophila

    B) Y-chromosome is female determinating in Drosophila

    C) Y-chromosome is male determining in human beings

    D) Y-chromosome has no role in sex determination either in Drosophila or in human beings

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  • question_answer179) A common scent-producing gland among mammals is

    A) anal gland

    B) prostate gland

    C) adrenal gland

    D) Bartholins gland

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  • question_answer180) Pulmonary artery is different from pulmonary vein because it has

    A) larger lumen

    B) thick muscular walls

    C) no endothelium

    D) valves

    View Answer play_arrow


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