Solved papers for BCECE Medical BCECE Medical Solved Papers-2013

done BCECE Medical Solved Papers-2013

  • question_answer1) The dimensions of universal gravitational constant are

    A) \[[{{M}^{-2}}{{L}^{-3}}{{T}^{-2}}]\]

    B) \[[{{M}^{-2}}\,{{L}^{2}}\,{{T}^{-1}}]\]

    C) \[[{{M}^{-1}}\,{{L}^{3}}\,{{T}^{-2}}]\]

    D) \[[M{{L}^{2}}\,{{T}^{-1}}]\]

    View Answer play_arrow
  • question_answer2) If \[\left| A\times B \right|=\sqrt{3}\,\,A\,.\,B\] then the value of \[\left| A+B \right|\] is

    A) A + B

    B) \[{{({{A}^{2}}+{{B}^{2}}+\sqrt{3}\,AB)}^{1/2}}\]

    C) \[{{\left( {{A}^{2}}+{{B}^{2}}+\frac{AB}{\sqrt{3}} \right)}^{1/2}}\]

    D) \[{{({{A}^{2}}+{{B}^{2}}+AB)}^{1/2}}\]

    View Answer play_arrow
  • question_answer3) Two spheres of masses m and M are situated in air and the gravitional force between them is F. The space around the masses is now filled with a liquid of specific gravity 3. The new gravitational force will be

    A) F

    B) \[\frac{F}{3}\]

    C) 3F

    D) \[\frac{F}{9}\]

    View Answer play_arrow
  • question_answer4) A body floats in water with one fourth of its volume above the surface of water. If placed in oil it floats with one third of its volume above the surface of oil. The density of oil is

    A) \[\frac{3}{4}\]

    B) \[\frac{4}{9}\]

    C) \[\frac{2}{3}\]

    D) \[\frac{9}{8}\]

    View Answer play_arrow
  • question_answer5) When capillary tubes of different radii r dipped in water, water rises to different heights h in them, then

    A) \[{{h}^{2}}=\] constant

    B) hr = constant

    C) \[\frac{h}{r}=\] constant

    D) \[\frac{h}{{{r}^{2}}}=\] constant

    View Answer play_arrow
  • question_answer6) In the adjoining figure A, B, and C represents three progressive waves. Which of the following statement about the waves is correct?

    A) Wave C lags behind in phase by \[\frac{\pi }{2}\] from A and. B leads by \[\frac{\pi }{2}\]

    B) Wave C leads in phase by \[\pi \] from A and B lags behind by \[\pi \]

    C) Wave C leads in phase by \[\frac{\pi }{2}\] from A and lags behind by \[\frac{\pi }{2}\]

    D) Wave C lags behind in phase by \[\pi \] from A and B leads by \[\pi \]

    View Answer play_arrow
  • question_answer7) If 110 J of heat are added to a gaseous system, whose internal energy is 40 J, then the amount of external work done is

    A) 40 J

    B) 70 J

    C) 110 J

    D) 150 J

    View Answer play_arrow
  • question_answer8) A ray is incident at an angle of incidence i on one surface of a prism of small angle A and emerges normally from the opposite surface. If the refractive index of the material of the prism is \[\mu \], the angle of incidence \[i\] is nearly equals to

    A) \[\mu \,A/2\]

    B) \[A/2\,\mu \]

    C) \[\mu \,A\]

    D) \[A/\mu \]

    View Answer play_arrow
  • question_answer9) Figure below shows four plates each of area S separated from one another by a distance d. What is the capacitance between A and B?

    A) \[\frac{4{{\varepsilon }_{0}}3}{d}\]

    B) \[\frac{3{{\varepsilon }_{0}}5}{d}\]

    C) \[\frac{2{{\varepsilon }_{0}}5}{d}\]

    D) \[\frac{{{\varepsilon }_{0}}5}{d}\]

    View Answer play_arrow
  • question_answer10) What is the value of current in the arm containing \[2\pi \] resistor in the adjoining circuit?

    A) 0.7 amp

    B) 1.2 amp

    C) 1.5 amp

    D) 1.0 amp

    View Answer play_arrow
  • question_answer11) For ohmic conductor the drift velocity \[{{\upsilon }_{d}}\] and the electric field applied across it are related as

    A) \[{{v}_{d}}\propto \sqrt{E}\]

    B) \[{{v}_{d}}\propto {{E}^{2}}\]

    C) \[{{v}_{d}}\propto E\]

    D) \[{{v}_{d}}\propto \frac{1}{E}\]

    View Answer play_arrow
  • question_answer12) If E and B be the electric and magnetic field vectors of electromagnetic waves, the direction of propagation of electromagnetic waves is that of

    A) E

    B) B

    C) E \[\times \] B

    D) B \[\times \] E

    View Answer play_arrow
  • question_answer13) The current in RCL circuit is maximum where

    A) \[{{X}_{L}}=0\]

    B) \[{{X}_{L}}={{X}_{C}}\]

    C) \[{{X}_{C}}=0\]

    D) \[X_{L}^{2}+X_{C}^{2}=1\]

    View Answer play_arrow
  • question_answer14) What is the value of \[\overline{A}\] + A in the boolean algebra?

    A) 0

    B) 1

    C) A

    D) A

    View Answer play_arrow
  • question_answer15) The truth table given below is for which gate?

    A B Y
    0 0 1
    0 1 1
    1 0 1
    1 1 0

    A) XOR

    B) OR

    C) AND

    D) NAND

    View Answer play_arrow
  • question_answer16) The magnetic flux through a circuit of resistance R changes by an amount \[\Delta \phi \] in a time \[\Delta t\]. Then the total quantity of electric charge Q that passes any point in the circuit during the time \[\Delta t\] is represented by

    A) \[Q=\frac{\Delta \phi }{\Delta t}\]

    B) \[Q=\frac{\Delta \phi }{R}\]

    C) \[Q=R.\frac{\Delta \phi }{\Delta t}\]

    D) \[Q=\frac{1}{R}\frac{\Delta \phi }{\Delta t}\]

    View Answer play_arrow
  • question_answer17) A particle moves along a circle of radius \[\left( \frac{20}{\pi } \right)\]m with constant tangential acceleration. If the velocity of the particle is 80 m/s at the end of the second revolution after motion has begun the tangential acceleration will be

    A) \[40\,\pi \,m/{{s}^{2}}\]

    B) \[40\,m/{{s}^{2}}\]

    C) \[160\,\pi \,m/{{s}^{2}}\]

    D) \[640\,\pi \,m/{{s}^{2}}\]

    View Answer play_arrow
  • question_answer18) The output of a OR gate is 1

    A) if either input is zero

    B) if both inputs are zero

    C) only if both inputs are 1

    D) if either or both inputs are 1

    View Answer play_arrow
  • question_answer19) Two 220 V, 100 W bulbs are connected first in series and then in parallel. Each time the combination is connected to a 220V AC supply line, the power drawn by the combination in each case respectively will be

    A) 50 W, 200 W

    B) 50 W, 20 W

    C) 100 W, 50 W

    D) 200 W, 150 W

    View Answer play_arrow
  • question_answer20) Barrier potential of a p-n junction diode does not depend on

    A) diode design

    B) doping density

    C) temperature

    D) farward bias

    View Answer play_arrow
  • question_answer21) A projectile is projected with a linear momentum p making an angle 9 with the horizontal. The change in momentum of the projectile on return to the ground will be

    A) \[2\,p\tan \theta \]

    B) \[2\,p\sin \theta \]

    C) \[2\,p\cos \theta \]

    D) 2p

    View Answer play_arrow
  • question_answer22) A weigthtless thread can bear tension up to 3.7 kg wt. A stone of mass 500 g is tied to it and revolved in a circular path of radius 4m in a vertical plane. If \[g=10\,m/{{s}^{2}}\], then the maximum angular velocity of the stone will be

    A) 2 rad/s

    B) 4 rad/s

    C) 16rad/s

    D) \[\sqrt{21}\] rad/s

    View Answer play_arrow
  • question_answer23) Under a constant torque, the angular momentum of a body changes from A to 4 A in 4 s. The torque is

    A) 3 A

    B) \[\frac{1}{4}A\]

    C) \[\frac{3}{4}A\]

    D) \[\frac{4}{3}A\]

    View Answer play_arrow
  • question_answer24) The mass of a planet is double and its radius is half compared to that of earth. Assuming \[g=10\,m/{{s}^{2}}\] on earth, the acceleration due to gravity at the planet will be

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

    B) 20 \[m/{{s}^{2}}\]

    C) 40 \[m/{{s}^{2}}\]

    D) None of these

    View Answer play_arrow
  • question_answer25) A soap bubble in vacuum, has a radius of 3 cm and another soap bubble in vacuum has a radius of 4 cm. If the two bubbles coalesce under isothermal condition, then the radius of new bubble is

    A) 4.3cm

    B) 4.5cm

    C) 5cm

    D) 7cm

    View Answer play_arrow
  • question_answer26) Deuteron and a-particle are put \[1\overset{\text{o}}{\mathop{\text{A}}}\,\] apart in air. Magnitude of intensity of electric field due to deuteron of a-particle is

    A) zero

    B) \[2.88\times {{10}^{11}}N/C\]

    C) \[1.44\times {{10}^{11}}N/C\]

    D) \[5.76\times {{10}^{11}}N/C\]

    View Answer play_arrow
  • question_answer27) The air column in pipe, which is closed at one end will be in resonance with a vibrating turning fork at a frequency of 260 Hz, if the length of the air column is

    A) 31.73cm

    B) 62.5cm

    C) 35.75cm

    D) 12.5cm

    View Answer play_arrow
  • question_answer28) A ball strikes against the floor and returns with double the velocity. In which type of collision is it possible?

    A) Inelastic

    B) Perfectly inelastic

    C) Perfectly elastic

    D) Not possible

    View Answer play_arrow
  • question_answer29) A body is under the action of three force \[{{F}_{1}},{{F}_{2}}\], and \[{{F}_{3}}\]. In which case the body cannot under go angular acceleration?

    A) \[{{F}_{1}}+{{F}_{2}}+{{F}_{3}}=0\]

    B) \[{{F}_{1}},{{F}_{2}}\] and \[{{F}_{3}}\] are concurrent

    C) \[{{F}_{1}}\], and \[{{F}_{2}}\] act at the same point but, \[{{F}_{3}}\]acts at different point

    D) \[{{F}_{1}}+{{F}_{2}}\] is parallel to \[{{F}_{3}}\], but the three forces are not concurrent

    View Answer play_arrow
  • question_answer30) Two beams of protons moving parallel in same direction will

    A) repel each other

    B) exert no force

    C) attract each other

    D) deflect perpendicular to the plane of the beams

    View Answer play_arrow
  • question_answer31) A photon and an electron possess same de-Broglie wavelength given that C = speed of light and \[\upsilon =\] space of electron, which of the following relation is correct? (here, \[{{E}_{e}}=K.\,E\] of electron, \[{{E}_{Ph}}=K.\,E\] of photon, \[{{P}_{e}}=\] momentum of electron, \[{{P}_{ph}}=\]momentum of photon)

    A) \[\frac{{{P}_{e}}}{{{P}_{Pn}}}=\frac{C}{2v}\]

    B) \[\frac{{{E}_{e}}}{{{E}_{Pn}}}=\frac{C}{2v}\]

    C) \[\frac{{{E}_{ph}}}{{{E}_{e}}}=\frac{2C}{v}\]

    D) \[\frac{{{P}_{e}}}{{{P}_{ph}}}=\frac{2C}{v}\]

    View Answer play_arrow
  • question_answer32) To get an output Y == 1 from circuit of adjoining figure, the input must be

    A) A - 0 B - 1 C - 0

    B) A - 1 B - 0 C - 0

    C) A - 1 B - 0 C - 1

    D) A - 1 B - 1 C - 0

    View Answer play_arrow
  • question_answer33) Hubbles law is expressed as (here, \[\upsilon =\] speed of recession, r = distance of galaxy, H = bubble constant)

    A) v = Hr

    B) \[v={{H}^{2}}r\]

    C) (c )\[v=\frac{H}{{{r}^{2}}}\]

    D) \[v=H{{r}^{2}}\]

    View Answer play_arrow
  • question_answer34) The displacement versus time graph for a body moving in a straight line is shown in figure. Which of the following regions represents motor when no force is acting on the body?

    A) ab

    B) be

    C) cd

    D) be

    View Answer play_arrow
  • question_answer35) Which of the following graphs shows the variation of magnetic field B, with distance from a long current carrying conductor?

    A)

    B)

    C)

    D)

    View Answer play_arrow
  • question_answer36) The time period of a freely suspended magnet does not depend upon

    A) length of the magnet

    B) the pole strength of the magnet

    C) the horizontal component of magnetic field of earth

    D) the length of the suspension

    View Answer play_arrow
  • question_answer37) The magnetic permeability is defined as the ratio of

    A) magnetic induction and magnetising field

    B) intensity of magnetisation and magnetising field

    C) intensity of magnetisation and magnetic field

    D) None of the above

    View Answer play_arrow
  • question_answer38) Figure represents an area \[A=0.5\,\,{{m}^{2}}\] situated in a uniform magnetic field \[B=2.0\,\,Wb/{{m}^{2}}\] and making an angle of \[{{60}^{o}}\] with respect to magnetic field. The value of magnetic flux through the area will be

    A) 0.5 Wb

    B) \[\sqrt{3}\] Wb

    C) \[\frac{3}{2}\] Wb

    D) 2.0 Wb

    View Answer play_arrow
  • question_answer39) Of the given diodes, shown in the adjoining diagrams, which one is reverse biased?

    A)

    B)

    C)

    D)

    View Answer play_arrow
  • question_answer40) Three particles each of mass m gram, are situated at the vertices of an equilateral triangle ABC of the side 1 cm. The moment of inertia of the system (as shown in figure) about a line AX perpendicular to AB and in the plane of ABC in gram- \[c{{m}^{2}}\] units will be

    A) \[\frac{3}{2}m{{l}^{2}}\]

    B) \[\frac{3}{4}m{{l}^{2}}\]

    C) \[2\,m{{l}^{2}}\]

    D) \[\frac{5}{4}\,m{{l}^{2}}\]

    View Answer play_arrow
  • question_answer41) A galvanometer of \[50\pi \] resistance has 25 divisions. A current of \[4\times {{10}^{-4}}A\] gives a deflection of one division. To convert this galvanometer into a voltmeter having a range of 25 volt, it should be connected with a resistance of

    A) 245\[\pi \] as shunt

    B) 2450\[\pi \] as series

    C) 2500\[\pi \] as shunt.

    D) 2550\[\pi \] in series

    View Answer play_arrow
  • question_answer42) A car is moving towards a high cliff. The car driver sounds a horn of frequency \[f\]. The reflected sound heard by the driver has the frequency \[2f\]. If be the velocity of sound, then the velocity of the car, in the same velocity units will be

    A) \[\frac{v}{\sqrt{2}}\]

    B) \[\frac{v}{2}\]

    C) \[\frac{v}{3}\]

    D) \[\frac{v}{4}\]

    View Answer play_arrow
  • question_answer43) A plane glass slab is kept over various coloured letters, the letter which appears least raised is

    A) violet

    B) blue

    C) green

    D) red

    View Answer play_arrow
  • question_answer44) If the angle of incidence is \[i\] and that of refraction is r. Then the speed of light in the medium to which the light is refracted from air is

    A) \[v=C\frac{\sin i}{\cos r}\]

    B) \[v=C\frac{\cos r}{\cos i}\]

    C) \[v=C\frac{\sin r}{\sin i}\]

    D) \[v=C\frac{\sin i}{\sin r}\]

    View Answer play_arrow
  • question_answer45) An electron moves with a velocity v in an electric field E. If the angle between v and E is neither 0 nor \[\pi \], the path followed by the electron is

    A) parabola

    B) circle

    C) straight-line

    D) ellipse

    View Answer play_arrow
  • question_answer46) The internal resistance of a cell of emf 2 V is 0. 1\[\pi \]. If it is connected to a resistance of 3.9 \[\pi \], then the voltage across the cell will be (in volts)

    A) 2V

    B) 0.5V

    C) 1.95V

    D) 2.5V

    View Answer play_arrow
  • question_answer47) An electric kettle takes 4 A current a 1220V. How much time will it take to boil 1 kg of water from room temperature \[{{20}^{o}}C\]? (the temperature of boiling water is \[{{100}^{o}}C\])

    A) 12.6 min

    B) 12.8 min

    C) 6.3 min

    D) 6.4 min

    View Answer play_arrow
  • question_answer48) The phenomenon of pair production is

    A) ejection of an electron from a nucleus

    B) ejection of an electron from a metal surface

    C) ionisation of a neutral atom

    D) the production of an electron and a positron from \[\gamma \]-rays.

    View Answer play_arrow
  • question_answer49) In an electron microscope if the potential is increased from 20 kV to 80 kV, the resolving power R of the microscope will become

    A) 0

    B) W

    C) 4R

    D) 5R

    View Answer play_arrow
  • question_answer50) Force acting upon a charged particle kept between the plates of changed capacitor is F. If one of the plates of the capacitor is removed force acting on the same particle will become

    A) 0

    B) F

    C) \[\frac{F}{2}\]

    D) 2F

    View Answer play_arrow
  • question_answer51) \[C{{H}_{3}}-\overset{\begin{smallmatrix} C{{H}_{3}} \\ | \end{smallmatrix}}{\mathop{\underset{\begin{smallmatrix} | \\ C{{H}_{3}} \end{smallmatrix}}{\mathop{C}}\,}}\,-\overset{\begin{smallmatrix} OH \\ | \end{smallmatrix}}{\mathop{C}}\,HC{{H}_{3}}\xrightarrow{HBr}\] A(Predominant) Identify A.

    A) \[{{(C{{H}_{3}})}_{2}}C\,(Br)\,CH\,{{(C{{H}_{3}})}_{2}}\]

    B) \[{{(C{{H}_{3}})}_{3}}CCH\,(Br)\,C{{H}_{3}}\]

    C) \[{{(C{{H}_{3}})}_{3}}COHBr\,C{{H}_{3}}\]

    D) None of the above

    View Answer play_arrow
  • question_answer52) A P-hydroxy carbonyl compound is obtained by the action of \[NaOH\] on

    A) \[{{C}_{6}}{{H}_{5}}CHO\]

    B) \[HCHO\]

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

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

    View Answer play_arrow
  • question_answer53) Which of the following statements is correct?

    A) + / effect stabilises a carbanion

    B) + / effect stabilises a carbocation

    C) -/ effect stabilises a carbanion

    D) - / effect stabilises a carbocation

    View Answer play_arrow
  • question_answer54) \[{{C}_{4}}{{H}_{6}}{{O}_{4}}A\xrightarrow{\Delta }{{C}_{3}}{{H}_{6}}{{O}_{2}}B\xrightarrow[\Delta ]{sodalime}C\] Compound C is a hydrocarbon, occupying approx 0.75 L volume per gram. Identify A and B.

    A) Tartaric acid, propanoic acid

    B) Succinic acid, succinic anhydride

    C) Maleic anhydride, maleic acid

    D) Methyl malonic acid, propanoic acid

    View Answer play_arrow
  • question_answer55) What is effective nuclear charge and the periphery of nitrogen atom when an extra electron is added in the formation of an anion?

    A) 1.20-

    B) 2.45

    C) 3.55

    D) 5.95

    View Answer play_arrow
  • question_answer56) A certain metal sulphide, \[M{{S}_{2}}\], is used extensively as a high temperature lubricant. If \[M{{S}_{2}}\] has 40.06 % sulphur by weight, atomic mass of M will be

    A) 100 amu

    B) 96 amu

    C) 60 amu

    D) 30 amu

    View Answer play_arrow
  • question_answer57) In HNC, which element has least value of formal charge?

    A) H

    B) N

    C) C

    D) All have same value

    View Answer play_arrow
  • question_answer58) Consider following unit values of energy

    I. 1 L atm,
    II. 1 erg,
    III. 1 J
    IV. kcal,
    Increasing order of these values is

    A) I = II = III = IV

    B) l < II < III < IV

    C) ll < lll < I < IV

    D) IV < l < III < II

    View Answer play_arrow
  • question_answer59) The number of elements in the transition metal series Sc through Zn that have four unpaired electrons in their + 2 state are

    A) 2

    B) 4

    C) 5

    D) 6

    View Answer play_arrow
  • question_answer60) In an atmosphere with industrial smog, copper corrodes to

    I. \[C{{u}_{2}}{{(OH)}_{2}}S{{O}_{4}}\]
    II. \[C{{u}_{2}}{{(OH)}_{2}}C{{O}_{3}}\]
    III. \[CuS{{O}_{4}}\]
    IV. \[CuC{{O}_{3}}\]

    A) I and III

    B) II and IV

    C) I and IV

    D) I and II

    View Answer play_arrow
  • question_answer61) Mischmetal is

    A) an alloy of lanthanide and nickel

    B) an alloy of lanthanide and copper

    C) an alloy of lanthanide, iron and carbon

    D) an alloy of lanthanide, magnesium and nickel

    View Answer play_arrow
  • question_answer62) What is the oxidation state of iron in \[{{[Fe{{({{H}_{2}}O)}_{5}}NO]}^{2+}}\]?

    A) 0

    B) +1

    C) +2

    D) +3

    View Answer play_arrow
  • question_answer63) Identify the final product of the reaction \[BC{{l}_{3}}+N{{H}_{4}}Cl\xrightarrow[{{C}_{6}}{{H}_{5}}Cl]{{{140}^{o}}C}\xrightarrow{NaB{{H}_{4}}}?\]

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

    B) \[{{B}_{2}}{{H}_{6}}\]

    C) \[NaBC{{l}_{4}}\]

    D) BN

    View Answer play_arrow
  • question_answer64) 2.56 g of sulphur in 100 g of \[C{{S}_{2}}\] has depression in freezing point of \[{{0.010}^{o}}C\]. Atomicity of sulphur in \[C{{S}_{2}}\] is (Given, \[{{K}_{f}}={{0.1}^{o}}\,mola{{l}^{-1}}\])

    A) 2

    B) 4

    C) 6

    D) 8

    View Answer play_arrow
  • question_answer65) For the zeroth order reaction, sets I and II are given, hence \[x\]is

    I.
    II.

    A) 2 min

    B) 4 min

    C) 6 min

    D) 8 min

    View Answer play_arrow
  • question_answer66) Equilibrium constant for the reaction, \[N{{H}_{4}}OH+{{H}^{+}}NH_{4}^{+}+{{H}_{2}}O\] is \[1.8\times {{10}^{9}}\]. Hence, equilibrium constant for\[N{{H}_{3}}\,\,(aq)+{{H}_{2}}ONH_{4}^{+}+O{{H}^{-}}\] is

    A) \[1.8\times {{10}^{-5}}\]

    B) \[1.8\times {{10}^{5}}\]

    C) \[1.8\times {{10}^{-9}}\]

    D) \[5.59\times {{10}^{-10}}\]

    View Answer play_arrow
  • question_answer67) Calculate pH change when 0.01 mol\[C{{H}_{3}}KCOO\] Na solution is added to 1 L of\[0.01\,\,M\,C{{H}_{3}}COOH\] solution. \[Ka\,\,(C{{H}_{3}}COOH)=1.8\times {{10}^{-5}},\,pKa=4.74\]

    A) 3.37

    B) 1.37

    C) 4.74

    D) 8.01

    View Answer play_arrow
  • question_answer68) \[p{{K}_{b}}\] of \[N{{H}_{3}}\] is 4.74 and \[p{{K}_{b}}\] of \[{{A}^{-}},\,{{B}^{-}}\]and \[{{C}^{-}}\] are 4, 5 and 6 respectively. Aqueous solution of 0.01 M has pH in the increasing order

    A) \[N{{H}_{4}}A<N{{H}_{4}}B<N{{H}_{4}}C\]

    B) \[N{{H}_{4}}C<N{{H}_{4}}B<N{{H}_{4}}A\]

    C) \[N{{H}_{4}}C<N{{H}_{4}}A<N{{H}_{4}}B\]

    D) All have equal pH

    View Answer play_arrow
  • question_answer69) Osmotic pressure of insulin solution at 298 K is found to be 0.0072 atm. Hence, height of water column due to this pressure is [given d\[(Hg)=13.6\,\,g/mL\]]

    A) 0.76cm

    B) 0.70cm

    C) 7.4 cm

    D) 76 cm

    View Answer play_arrow
  • question_answer70) \[\Delta {{G}^{o}}\] and \[\Delta {{H}^{o}}\] for a reaction at 300 K is \[-66.9\,kJ\,mo{{l}^{-1}}\] and \[-41.8\,kJ\,mo{{l}^{-1}}\]respectively. \[\Delta {{G}^{o}}\] for the same reaction at 330 K is

    A) \[-25.1\,\,kJ\,\,mo{{l}^{-1}}\]

    B) \[+25.1\,\,kJ\,\,mo{{l}^{-1}}\]

    C) \[18.7\,\,kJ\,\,mo{{l}^{-1}}\]

    D) \[-69.4\,\,kJ\,\,mo{{l}^{-1}}\]

    View Answer play_arrow
  • question_answer71) At 1000 K, from the data \[{{N}_{2}}(g)+3{{H}_{2}}(g)\xrightarrow{{}}2N{{H}_{3}}(g);\] \[\Delta H=-123.77\,kJ\,\,mo{{l}^{-1}}\]

    Substance \[{{N}_{2}}\] \[{{H}_{2}}\] \[N{{H}_{3}}\]
    P/R 3.5 3.5 4
    Calculate the heat of formation of \[N{{H}_{3}}\] at 300 K.

    A) \[-44.42\,\,kJ\,\,mo{{l}^{-1}}\]

    B) \[-88.85\,\,kJ\,\,mo{{l}^{-1}}\]

    C) \[+44.42\,\,kJ\,\,mo{{l}^{-1}}\]

    D) \[+88.85\,\,kJ\,\,mo{{l}^{-1}}\]

    View Answer play_arrow
  • question_answer72) Match the electrode (in column I) with its general name (in Column II) and choose the correct option given below.

    Column - I Column - II
    A Calomel I. Reference
    B Glass II. Redox
    C Hydrogen III. Membrane
    D Quinhydrone IV. Gas

    A) A-III B-III C- IV D-IV

    B) A-IIII B-IV C-II D-II

    C) A-III B-II C-IV D- I

    D) A- II B-IV C- III D-I

    View Answer play_arrow
  • question_answer73) In a Daniell cell constructed in the laboratory, the voltage observed was 0.9 V instead of 1.1 V of the standard cell. A possible explanation is

    A) \[[Z{{n}^{2+}}]>[C{{u}^{2+}}]\]

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

    C) Zn electrode has twice the surface of Cu electrode

    D) mol ratio of \[Z{{n}^{2+}}:\,C{{u}^{2+}}\] is \[2:1\]

    View Answer play_arrow
  • question_answer74) A quantity of electrical charge that brings about the deposition of 4.5 g Al from \[A{{l}^{3+}}\] at the cathode will also produce the following volume at (STP) of \[{{H}_{2}}(g)\]) from \[{{H}^{+}}\] at the cathode

    A) 44.8 L

    B) 22.4 L

    C) 11.2L

    D) 5.6 L

    View Answer play_arrow
  • question_answer75) IUPAC name of the following compound is

    A) 3-propyi cyclo [3, 6] octane

    B) 1-ethyl tricyclo [2, 3, 0] heptane

    C) 1-ethyl bicyclo [2, 2,1] heptane

    D) 4-ethyl bicyclo [2, 2, 2] heptane .

    View Answer play_arrow
  • question_answer76) Identify Yin the following series of equation \[\to -H+B{{r}_{2}}\xrightarrow{h\upsilon }X\xrightarrow[{{D}_{2}}O]{Mg/ether}Y\]

    A)

    B)

    C)

    D)

    View Answer play_arrow
  • question_answer77) Arrange the following in the order of rate of oxidation with periodic acid

    I. \[HOC{{H}_{2}}C{{H}_{2}}OH\],
    II. \[C{{H}_{3}}CHOHCHOHC{{H}_{3}}\]
    III. \[{{(C{{H}_{3}})}_{2}}COHCOH\,{{(C{{H}_{3}})}_{2}}\]

    A) I > II > III

    B) ll > I > III

    C) III > II > I

    D) I > III = II

    View Answer play_arrow
  • question_answer78) Phenol and \[N{{H}_{3}}\] reacts in presence of \[ZnC{{l}_{2}}\]at \[{{300}^{o}}C\] to produce

    A) tertiary amine

    B) secondary amine

    C) primary amine

    D) All of these

    View Answer play_arrow
  • question_answer79) \[A\,\,[{{C}_{6}}{{H}_{10}}{{O}_{3}}\,(keto\text{ }ester)]\,\,\xrightarrow[\Delta ]{NaOH+{{I}_{2}}}\] yellow\[ppt+B\xrightarrow{{{H}^{+}}}\,C\xrightarrow[-C{{O}_{2}}]{\Delta }C{{H}_{3}}COOH\]. Hence, A is

    A) \[C{{H}_{3}}\overset{\begin{smallmatrix} O \\ || \end{smallmatrix}}{\mathop{C}}\,C{{H}_{2}}\overset{\begin{smallmatrix} O \\ || \end{smallmatrix}}{\mathop{C}}\,O{{C}_{2}}{{H}_{5}}\]

    B) \[C{{H}_{3}}C{{H}_{2}}\overset{\begin{smallmatrix} O \\ || \end{smallmatrix}}{\mathop{C}}\,C{{H}_{2}}\overset{\begin{smallmatrix} O \\ || \end{smallmatrix}}{\mathop{C}}\,OC{{H}_{3}}\]

    C) Both are correct

    D) None is correct

    View Answer play_arrow
  • question_answer80) \[C{{H}_{3}}\overset{\begin{smallmatrix} O \\ || \end{smallmatrix}}{\mathop{C}}\,C{{H}_{3}}\] can be converted into \[C{{H}_{3}}\overset{\begin{smallmatrix} O \\ || \end{smallmatrix}}{\mathop{C}}\,OH\]by following methods

    I. \[C{{H}_{3}}\overset{\begin{smallmatrix} O \\ || \end{smallmatrix}}{\mathop{C}}\,C{{H}_{3}}\,\,\xrightarrow[\Delta ,\,{{H}^{+}}]{{{I}_{2}}/NaOH}\]
    II. \[C{{H}_{3}}\overset{\begin{smallmatrix} O \\ || \end{smallmatrix}}{\mathop{C}}\,C{{H}_{3}}\,\,\xrightarrow{C{{r}_{2}}O_{7}^{2-}/{{H}^{+}}}\]
    III. \[C{{H}_{3}}\overset{\begin{smallmatrix} O \\ || \end{smallmatrix}}{\mathop{C}}\,C{{H}_{3}}\,\,\xrightarrow{Ag(N{{H}_{3}})_{2}^{+}}\]
    Which method are most effective?

    A) I, III

    B) II, III

    C) I, II

    D) I, II, III

    View Answer play_arrow
  • question_answer81) Relative stabilities of the following carbocation will be in order

    \[\underset{IV}{\mathop{C{{H}_{3}}\overset{\oplus }{\mathop{C}}\,{{H}_{2}}}}\,\]

    A) IV < III < II < I

    B) IV < II < III < I

    C) II < IV< III < I

    D) I < II < III < IV

    View Answer play_arrow
  • question_answer82) The correct statement in respect of protein haemoglobin is that it

    A) functions as a catalyst for biological reactions

    B) maintains blood sugar level

    C) acts as an oxygen carrier in the blood

    D) forms antibodies and offers resistance to diseases

    View Answer play_arrow
  • question_answer83) \[C{{H}_{3}}COOH+HCOOH\xrightarrow[570\,\,K]{MnO}\] Main product of above reaction is

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

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

    C) \[HCHO\]

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

    View Answer play_arrow
  • question_answer84) Aniline is reacted with bromine water and the resulting product is treated with an aqueous solution of sodium nitrite in presence of dilute hydrochloric acid. The compound so formed is converted to a tetrafluoroborate which is subsequently heated. The final product is

    A) p-bromoaniline

    B) p-bromofluorobenzene

    C) 1, 3, 5-tri bromobenzene

    D) 2, 4, 6-tribromofluorobenzene

    View Answer play_arrow
  • question_answer85) With hard water, ordinary soap forms curdy precipitate of

    A) \[{{(RCOO)}_{2}}Ca\]

    B) \[{{(RCOO)}_{2}}Mg\]

    C) Both [a] and [b]

    D) None of these

    View Answer play_arrow
  • question_answer86) Which is matched incorrectly? Structure Compound

    A)

    B)

    C) Both [a] and [b]

    D) None of the above

    View Answer play_arrow
  • question_answer87) Which base is normally found in RNA but not in DNA?

    A) Uracil

    B) Thymine

    C) Guanine

    D) Adenine

    View Answer play_arrow
  • question_answer88) The dipole moment of HBr is \[2.60\times {{10}^{-30}}cm\]and the interatomic spacing is \[1.41\,\overset{o}{\mathop{A}}\,\]. What is the per cent ionic character of \[HBr\]?

    A) 50 %

    B) 11.5 %

    C) 4.01 %

    D) 1.19 %

    View Answer play_arrow
  • question_answer89) An element is oxidised by fluorine and not by chlorine. Identify the element.

    A) Sodium

    B) Aluminium

    C) Oxygen

    D) Sulphur

    View Answer play_arrow
  • question_answer90) The reduction of an oxide by aluminium is called

    A) Krolls process

    B) van Arkel process

    C) Ellingham process

    D) Goldschmidts aluminothermite process

    View Answer play_arrow
  • question_answer91) \[{{H}_{2}}\] gas is liberated at cathode and anode both by electrolysis of the following solution except in

    A) \[NaCl\]

    B) \[NaH\]

    C) \[LiH\]

    D) \[HCOONa\]

    View Answer play_arrow
  • question_answer92) Identify [A] and [B] in the following sequence of reactions. \[SnC{{l}_{2}}+2NaOH\xrightarrow{{}}(A)\,\] (white ppt) \[\xrightarrow[(excess)]{NaOH}(B)\]

    A) \[Sn{{(OH)}_{2}},\,N{{a}_{2}}Sn{{O}_{3}}\]

    B) \[Sn{{(OH)}_{2}},\,N{{a}_{2}}Sn{{O}_{2}}\]

    C) \[Sn{{(OH)}_{2}},\,N{{a}_{2}}[Sn{{[OH)}_{2}}]\]

    D) \[Sn{{(OH)}_{2}}\], no effect

    View Answer play_arrow
  • question_answer93) Nature of nitride ion is

    A) acidic

    B) basic

    C) amphiprotic

    D) cannot predict

    View Answer play_arrow
  • question_answer94) Wave number of spectral line for a given transition is \[x\,c{{m}^{-1}}\] for \[H{{e}^{+}}\], then its value for \[B{{e}^{3+}}\] (isoelectronic of \[H{{e}^{+}}\]) for same transition is

    A) \[\frac{x}{4}c{{m}^{-1}}\]

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

    C) \[4x\,c{{m}^{-1}}\]

    D) \[16x\,c{{m}^{-1}}\]

    View Answer play_arrow
  • question_answer95) \[{{H}_{2}}{{O}_{2}}\] oxidises \[Mn{{O}_{2}}\] is \[MnO_{4}^{-}\] in basic medium, \[{{H}_{2}}{{O}_{2}}\] and \[Mn{{O}_{2}}\] react in the molar ratio of

    A) 1 : 1

    B) 2 : 1

    C) 2 : 3

    D) 3 : 2

    View Answer play_arrow
  • question_answer96) mL of an aqueous solution of KC1 was found to require 20 mL of 1 M \[AgN{{O}_{3}}\] solution when titrated using a \[{{K}_{2}}Cr{{O}_{4}}\] as indicator. Depression in freezing point of \[KCl\] solution with 100% ionisation will be [\[{{K}_{F}}={{2.0}^{o}}\,mo{{l}^{-1}}kg\], molarity = molality]

    A) \[{{3.2}^{o}}\]

    B) \[{{1.6}^{o}}\]

    C) \[{{0.8}^{o}}\]

    D) \[{{5.0}^{o}}\]

    View Answer play_arrow
  • question_answer97) Out of the following, select Lux-Flood Acid

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

    B) \[B{{F}_{3}}\]

    C) \[{{H}^{+}}\]

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

    View Answer play_arrow
  • question_answer98) On adding \[AgN{{O}_{3}}\] solution into \[Kl\] solution, a negatively charged colloidal sol. is obtained when they are in

    A) 100 m L of \[0.1\,\,M\,AgN{{O}_{3}}+100\,mL\] of 0.1 M KI

    B) 100 mL of \[0.1\,\,M\,AgN{{O}_{3}}+100\,mL\] of 0.2 mKI

    C) 100 mL of \[0.1\,\,M\,AgN{{O}_{3}}+100\,mL\] of 0.1 M KI

    D) 100 mL of \[0.15\,\,M\,AgN{{O}_{3}}+100\,mL\] of 0.15 MKI

    View Answer play_arrow
  • question_answer99) Graph between \[\log \left( \frac{x}{m} \right)\] and log d is a straight line at angle \[{{45}^{o}}\] with intercept OA as shown. Hence, \[\left( \frac{x}{m} \right)\] at a pressure of 0.2 aim is

    A) 0.8

    B) 0.6

    C) 0.4

    D) 0.2

    View Answer play_arrow
  • question_answer100) From the following reactions at 298 K, [a] \[Ca{{C}_{2}}(s)+2{{H}_{2}}O\,(l)\xrightarrow{{}}Ca{{(OH)}_{2}}(g)\]\[+{{C}_{2}}{{H}_{2}}(g)\,D{{H}^{o}}(kJ\,mo{{l}^{-1}})-127.9\] [b] \[Ca\,(s)+\frac{1}{2}{{O}_{2}}(g)\xrightarrow{{}}CaO(s)-635.1\] [c] \[CaO(s)+{{H}_{2}}O(I)\xrightarrow{{}}Ca{{(OH)}_{2}}\] \[-(s)-65.2\] [d] \[C\,\,(s)+{{O}_{2}}(s)\xrightarrow{{}}C{{O}_{2}}(s)-393.5\] [e] \[{{C}_{2}}{{H}_{2}}(g)+\frac{5}{2}{{O}_{2}}(g)\xrightarrow{{}}2C{{O}_{2}}(g)\] \[+{{H}_{2}}O\,(e)-1299.58\] Calculate the heat of formation of \[Ca{{C}_{2}}(s)\] at 298 K.

    A) \[-59.82\,KJ\,\,mo{{l}^{-1}}\]

    B) \[+59.82\,KJ\,\,mo{{l}^{-1}}\]

    C) \[-190.22\,KJ\,\,mo{{l}^{-1}}\]

    D) \[+190.22\,KJ\,\,mo{{l}^{-1}}\]

    View Answer play_arrow
  • question_answer101) Pineapple (annanas) fruit develops from

    A) a unilocular polycarpellary flower

    B) a multipistillate syncarpous flower

    C) a cluster of compactly borne flowers on a common axis

    D) a multilocular monocarpellary flower

    View Answer play_arrow
  • question_answer102) Parthenocarpic tomato fruits can be produced by

    A) removing androecium of flowers before pollen grains are released

    B) treating the plants with low concentrations of gibberellic acid and auxins

    C) raising the plants from vernalized seeds

    D) treating the plants with phenylmercuric acetate

    View Answer play_arrow
  • question_answer103) The blue baby syndrome results from

    A) excess of chloride

    B) methaemoglobin

    C) excess of dissolved oxygen

    D) excess of TDS (Total Dissolved Solids)

    View Answer play_arrow
  • question_answer104) Which one of the following statements is correct?

    A) Neurons regulate endocrine activity, but not wee versa |

    B) Endocrine glands regulate neural activity and nervous system regulates endocrine glands

    C) Neither hormones control neural activity nor the neurons control endocrine activity

    D) Endocrine glands regulate neural activity, but not vice versa

    View Answer play_arrow
  • question_answer105) Farmers in a particular region were concerned that pre-mature yellowing of leaves of a pulse crop might cause decrease in the yield. Which treatment could be most beneficial to obtain maximum seed yield?

    A) Frequent irrigation of the crop

    B) Treatment of the paints with cytokinins along with a small dose of nitrogenous fertiliser

    C) Removal of ail yellow leaves and spraying the remaining green leaves with 2, 4, 5-trichlorophenoxy acetic acid

    D) Application of iron and magnesium to promote synthesis of chlorophyll

    View Answer play_arrow
  • question_answer106) Which one of the following amino acids was not found to be synthesised in Millers experiment?

    A) Glycine

    B) Aspartic acid

    C) Glutamic acid

    D) Alanine

    View Answer play_arrow
  • question_answer107) Crop plants grown in monoculture are

    A) low in yield

    B) free from intraspecific competition

    C) characterised by poor root system,

    D) highly prone to pests

    View Answer play_arrow
  • question_answer108) The formula for exponential population growth is

    A) \[dt/dN=rN\]

    B) \[dN/rN=dt\]

    C) \[rN/dN=dt\]

    D) \[dN/dt=rN\]

    View Answer play_arrow
  • question_answer109) In photosystem-I, the first electron acceptor is

    A) ferredoxin

    B) cytochrome

    C) plastocyanin

    D) an iron-sulphur protein

    View Answer play_arrow
  • question_answer110) Which one of the following is the most suitable, medium for culture of Drosophila melanogaster?

    A) Moist bread

    B) Agar agar

    C) Ripe banana

    D) Cow dung

    View Answer play_arrow
  • question_answer111) Which antibiotic inhibits interaction between rRNA and wRNA during bacterial protein synthesis?

    A) Erythromycjn

    B) Neomycin

    C) Streptomycin

    D) Tetracycline

    View Answer play_arrow
  • question_answer112) Photochemical smog pollution does not contain

    A) ozone

    B) nitrogen dioxide

    C) carbon dioxide

    D) PAN (Peroxy AcyI Nitrate)

    View Answer play_arrow
  • question_answer113) The thalloid body of a slime mould (Myxomycetes) is known as

    A) protonema

    B) Plasmodium

    C) fruiting body

    D) mycelium

    View Answer play_arrow
  • question_answer114) What type of placentation is seen in sweet pea?

    A) Basal

    B) Axile

    C) Free central

    D) Marginal

    View Answer play_arrow
  • question_answer115) Long filamentous threads protruding at the end of a young cob of maize are

    A) anthers

    B) styles

    C) ovaries

    D) hairs

    View Answer play_arrow
  • question_answer116) How many different kinds of gametes will be produced by a plant having the genotype AABbCC?

    A) Three

    B) Four

    C) Nine

    D) Two

    View Answer play_arrow
  • question_answer117) Which of the following statements regarding mitochondrial membrane is not correct?

    A) The outer membrane is permeable to all kinds of molecules

    B) The enzymes of the electron transfer chain are embedded in the outer membrane

    C) The inner membrane is highly convoluted forming a series of infoldings

    D) The outer membrane resembles a sieve

    View Answer play_arrow
  • question_answer118) An organic substance bound to an enzyme and essential for its activity is called

    A) coenzyme

    B) holoenzyme

    C) apoenzyme

    D) isoenzyme

    View Answer play_arrow
  • question_answer119) Bowmans glands are found in

    A) olfactory epithelium

    B) external auditory ca. ial

    C) cortical nephrons only

    D) juxtamedullary nephrons

    View Answer play_arrow
  • question_answer120) The bacterium (Clostridium botulinum) that causes botulism is

    A) a facultative anaerobe

    B) an obligate anaerobe

    C) a facultative aerobe

    D) an obligate aerobe

    View Answer play_arrow
  • question_answer121) Sulphur is an important nutrient for optimum growth and productivity in

    A) pulse crops

    B) cereals

    C) fibre crops

    D) oilseed crops

    View Answer play_arrow
  • question_answer122) In a moss the sporophyte

    A) is partially parasitic on the gametophyte

    B) produces gametes that give rise to the gametophyte

    C) arises from a spore produced from the gametophyte

    D) manufactures food for itself, as well as for the gametophyte

    View Answer play_arrow
  • question_answer123) Curing of tea leaves is brought about by the activity of

    A) bacteria

    B) mycorrhiza

    C) viruses

    D) fungi

    View Answer play_arrow
  • question_answer124) Annual migration does not occur in the case of

    A) salmon

    B) Siberian crane

    C) salamander

    D) arctic tern

    View Answer play_arrow
  • question_answer125) A major break through in the studies of cells came with the development of electron microscope. This is because

    A) the resolution power of the electron microscope is much higher than that of the light microscope

    B) the resolving power of the electron microscope is 200 - 350 nm as compared to 0.1 - 0.2 nm for the light microscope

    C) electron beam can pass through thick materials, whereas light microscopy requires thin sections

    D) the electron microscope is more powerful than the light microscope as it uses a beam of electrons which has wavelength much longer than that of photons

    View Answer play_arrow
  • question_answer126) Metameric segmentation is the characteristic of

    A) Platyhelminthes and Arthropoda

    B) Echinodermata and Annelida

    C) Annelida and Arthropoda

    D) Mollusca and Chordata

    View Answer play_arrow
  • question_answer127) What is common about Trypanosoma, Noctiluca, Monocystis and Giardiat

    A) These are all unicellular protists

    B) They have flagella

    C) They produce spores

    D) These are ail parasites

    View Answer play_arrow
  • question_answer128) Evolutionary history of an organism is known as

    A) Phylogeny

    B) Ancestry

    C) Paleontology

    D) Ontogeny

    View Answer play_arrow
  • question_answer129) Which of the following is considered a hot-spot of biodiversity in India?

    A) Western ghats

    B) Indo-Gangetic plain

    C) Eastern ghats

    D) Aravalli hills

    View Answer play_arrow
  • question_answer130) Which one of the following is an example of polygenic inheritance?

    A) Flower colour in Mirabilis jalapa

    B) Production of male honey bee

    C) Pod shape in garden pea

    D) Skin colour in humans

    View Answer play_arrow
  • question_answer131) Which one of the following not act as a neurotransmitter?

    A) Acetylcholine

    B) Epinephrine

    C) Nor epinephrine

    D) Cortisone

    View Answer play_arrow
  • question_answer132) A steroid hormone which regulates glucose metabolism is

    A) cortisol

    B) corticosterone

    C) 1-1-deoxycorticosterone

    D) cortisone

    View Answer play_arrow
  • question_answer133) Which one of the following is not a second messenger in hormone action?

    A) cGMP

    B) Calcium

    C) Sodium

    D) cAMP

    View Answer play_arrow
  • question_answer134) In Mendels experiments with garden pea, round seed shape (RR) was dominant over wrinkled seeds (IT), yellow cotyledon (YY) was dominant over green cotyledon (yy). What are the expected phenotypes in the \[{{F}_{2}}\] generation of the cross RRYY \[x\] rryy?

    A) Only round seeds with green cotyledons

    B) Only wrinkled seeds with yellow cotyledons

    C) Only wrinkled seeds with green cotyledons

    D) Round seeds with yellow cotyledons and wrinkled seeds with yellow cotyledons

    View Answer play_arrow
  • question_answer135) One turn of the helix in a B-form DNA is approximately

    A) 20 nm

    B) 0.34 nm

    C) 3.4 nm

    D) 2 nm

    View Answer play_arrow
  • question_answer136) Antiparallel strands of a DNA molecule means that

    A) one strand turns anti-clockwise

    B) the phosphate groups of two DNA strands, at their ends, share the same position

    C) the phosphate groups at the start of two DNA strands are in opposite position (pole)

    D) one strand turns clockwise

    View Answer play_arrow
  • question_answer137) Mast cells secrete

    A) hippurin

    B) myoglobin

    C) histamine

    D) haemoglobin

    View Answer play_arrow
  • question_answer138) If a colourblind woman marries a normal visioned man, their sons will be

    A) all normal visioned

    B) one-half colourblind and one-half normal

    C) three-fourths colourbling and one-fourth normal

    D) all colourblind

    View Answer play_arrow
  • question_answer139) Antibodies in our body are complex

    A) lipoproteins

    B) steroids

    C) prostaglandins

    D) glycoproteins

    View Answer play_arrow
  • question_answer140) Limit of BOD prescribed by Central Pollution Control Board for the discharge of industrial and municipal waste water into natural surface water, is

    A) < 3.0 ppm

    B) < 10 ppm

    C) < 100ppm

    D) < 30 ppm

    View Answer play_arrow
  • question_answer141) Earthworms are

    A) ureotelic when plenty of water is available

    B) uricotelic when plenty of water is available

    C) uricotelic under conditions of water scarcity

    D) ammonotelic when plenty of water is available

    View Answer play_arrow
  • question_answer142) Withdrawal of which of the following hormones is the immediate cause of menstruation?

    A) Oestrogens

    B) FSH

    C) FSH-RH

    D) Progesterone

    View Answer play_arrow
  • question_answer143) Which one of the following statements is incorrect?

    A) The residual air in lungs slightly decreases the efficiency of respiration in mammals

    B) The presence of non-respiratory air sacs, increases the efficiency of respiration in birds

    C) (n insects, circulating body fluids serve to distribute oxygen to tissues

    D) The principle of countercurrent flow facilitates efficient respiration in gills of fishes

    View Answer play_arrow
  • question_answer144) The translocation of organic solutes in sieve tube members is supported by

    A) root pressure and transpiration pull

    B) P-proteins

    C) mass flow involving a carrier and ATP

    D) cytoplasmic streaming

    View Answer play_arrow
  • question_answer145) An enzyme that can stimulate germination of barley seeds is

    A) a-amylase

    B) lipase

    C) protease

    D) invertase

    View Answer play_arrow
  • question_answer146) In a cereal grain the single cotyledon of embryo is represented by

    A) coleorhiza

    B) scutellum

    C) prophyll

    D) coleoptile

    View Answer play_arrow
  • question_answer147) The majority of carbon dioxide produced by our body cells is transported to the lungs

    A) dissolved in the blood

    B) as bicarbonates

    C) as carbonates

    D) attached to haemoglobin

    View Answer play_arrow
  • question_answer148) In order to obtain virus-free plants through tissue culture the best method is

    A) protoplast culture

    B) embryo rescue

    C) anther culture

    D) meristem culture

    View Answer play_arrow
  • question_answer149) Sickle-cell anaemia has not been eliminated from the African population because

    A) it is controlled by recessive genes

    B) it is not a fatal disease

    C) it provides immunity against malaria

    D) it is controlled by dominant genes

    View Answer play_arrow
  • question_answer150) Both sickle-cell anaemia and Huntingtons chorea are

    A) bacteria-related diseases

    B) congenital disorders

    C) pollutant-induced disorders

    D) virus-related diseases

    View Answer play_arrow

   

You need to login to perform this action.
You will be redirected in 3 sec spinner

Free
Videos