Solved papers for AMU Medical AMU Solved Paper-1999

AMU Solved Paper-1999 Total Questions - 200

1) Four particles of masses m, 2m, 3m and 4m are arranged at the corners of a parallelogram with each side equal to a and one of the angle between two adjacent sides as\[60{}^\circ \]. The parallelogram lies in the \[x-y\] plane with mass m at the origin and 4m on the \[x-\]axis. The centre of mass of the arrangement will be located at

A)

\[\left( \frac{\sqrt{3}}{2}a,0.95a \right)\]

B)

\[\left( 0.95a,\frac{\sqrt{3}}{4}a \right)\]

C)

\[\left( \frac{3a}{4},\frac{a}{2} \right)\]

D)

\[\left( \frac{a}{2},\frac{3a}{4} \right)\]

View Answer
2) A 20 kg block is initially at rest on a rough horizontal surface. A horizontal force of 75 N is required to set the block in motion. After it is in motion, a horizontal force of 60 N is required to keep the block moving with constant speed. The coefficient of static friction is

A)

0.38

B)

0.44

C)

0.52

D)

0.60

View Answer
3) The total kinetic energy of a rolling sphere having translational velocity V is

A)

\[\frac{7}{10}M{{V}^{2}}\]

B)

\[\frac{1}{2}M{{V}^{2}}\]

C)

\[\frac{2}{5}M{{V}^{2}}\]

D)

\[\frac{10}{7}M{{V}^{2}}\]

View Answer
4) An elastic string has length\[\beta \]when subjected to 5 N tension. Its length is a when tension 4 N. When subjected to a tension of 9 N, its length will become

A)

\[9(\beta -\alpha )\]

B)

\[5\alpha -4\beta \]

C)

\[5\beta -4\alpha \]

D)

\[\beta -\alpha \]

View Answer
5) During a journey from earth to moon and back, the greatest energy required from the rocket of the space ship is to overcome

A)

the moons gravity at lunar landing

B)

the moons gravity at lunar take off

C)

the earths gravity at re-entry into earths atmosphere

D)

the earths gravity at take off

View Answer
6) A ball is rolled off the edge of a horizontal table at a speed of 4 m/second. It hits the ground after 0.4 second. Which statement given below is not true?

A)

it hits the ground at a horizontal distance 1.6 m from the edge of the table

B)

the speed with which it hits the ground is 0.4m/second

C)

height of the table is 0.8 m

D)

it hits the ground at an angle of\[45{}^\circ \]to the horizontal

View Answer
7) A body of mass M kg initially at rest explodes into three fragments having masses in the ratio\[3:1:1\]. The two equal mass fragments fly off at right angles to each other with equal speed of 60 m/s. The speed of the heavier fragment is

A)

\[30\sqrt{2}\,m/s\]

B)

\[10\sqrt{2}\,m/s\]

C)

\[20\sqrt{2}\,m/s\]

D)

\[20\,m/s\]

View Answer
8) Three masses are connected (as Shown) on a horizontal frictionless surface and pulled by a force of 60 N. The tensions\[{{T}_{1}}\]and\[{{T}_{2}}\]are in the ratio

A)

\[1:1\]

B)

\[1:5\]

C)

\[1:4\]

D)

\[4:5\]

View Answer
9) A body is moved along a straight line by a machine which delivers constant power. The distance moved by the body in time\[t\]is proportional to

A)

\[t\]

B)

\[{{t}^{1/2}}\]

C)

\[{{t}^{5/2}}\]

D)

\[{{t}^{3/2}}\]

View Answer
10) If the speed of light [c], acceleration due to gravity [g] and pressure [P] are taken as the fundamental quantities, then the dimension of gravitational constant is

A)

\[{{c}^{2}}{{g}^{0}}{{p}^{-2}}\]

B)

\[{{c}^{0}}{{g}^{2}}{{p}^{-1}}\]

C)

\[c{{g}^{3}}{{p}^{-2}}\]

D)

\[c{{g}^{0}}{{p}^{-1}}\]

View Answer
11) If the kinetic energy of one mole of an ideal gas is given as\[E=\frac{3}{2}RT\] (where 7? is the universal gas constant and T is the absolute temperature of the gas), the molar specific heat at constant pressure will be given as

A)

\[2.5\text{ }R\]

B)

\[1.5\text{ }R\]

C)

\[0.5\text{ }R\]

D)

\[0.1\text{ }R\]

View Answer
12) Which one of the following statement is true?

A)

for monoatomic gases \[\gamma =1.40\]

B)

for diatomic gases \[{{C}_{p}}-{{C}_{V}}=2\text{ }cal\]

C)

for polyatomic gases \[\gamma =1.67\]

D)

for all the gases \[{{C}_{p}}=4R\]

View Answer
13) A Carnot engine working between 300 K and 600 K has a work output of 800 joules per cycle. The amount of heat energy supplied from the source to the engine in each cycle is

A)

6400 joule

B)

1600 joule

C)

3200 joule

D)

800 joule

View Answer
14) Oxygen and hydrogen gases are at the same temperature and pressure. The oxygen molecule has 16 times the mass of hydrogen molecule. The ratio of the root mean square velocity of oxygen molecule to that of hydrogen molecule will be

A)

16

B)

4

C)

2

D)

¼

View Answer
15) A thin metal disc of radius r floats on water surface and bends the surface downwards along the perimeter making an angle\[\theta \]with verticle edge of the disc. If the disc displaces a weight of water W and surface tension of water is T, then the weight of metal disc is

A)

\[2\pi rT+W\]

B)

\[2\pi rT\cos \theta -W\]

C)

\[2\pi rT\cos \theta +W\]

D)

\[W-2\pi rT\cos \theta \]

View Answer
16) A block of mass is suspended from a spring balance. When the block is in air the balance reads 120 N. When it is immersed in water the reading changes to 80 N. The relative density of the material of the block is

A)

6

B)

\[\frac{6}{2}\]

C)

\[\frac{6}{3}\]

D)

\[\frac{6}{4}\]

View Answer
17) A 10 cm long wire is placed horizontally on the surface of water and is gently pulled up with a force of \[2\times {{10}^{-2}}N\]to keep the wire in equilibrium. The surface tension, in\[N{{m}^{-1}}\]of water is

A)

0.1

B)

0.2

C)

0.001

D)

0.002

View Answer
18) Radius of gyration of uniform thin rod of length about an axis passing normally through its centre of mass is

A)

\[\frac{L}{\sqrt{12}}\]

B)

\[\frac{L}{12}\]

C)

\[\sqrt{12}L\]

D)

\[12L\]

View Answer
19) An artificial satellite is placed into a circular orbit around earth at such a height that it always remains about a definite place on the surface of earth. Its height from the surface of earth is

A)

6400 km

B)

4800 km

C)

32000km

D)

36000km

View Answer
20) A pendulum bob of mass 50 gm is suspended from the ceiling of an elevator. The tension in the string if the elevator goes up with uniform velocity is approximately

A)

0.30 N

B)

0.40 N

C)

0.42 N

D)

0.50 N

View Answer
21) An infinite ladder network is arranged with resistances\[R\]and\[2R\]as shown. The effective resistance between terminals A and B is

A)

\[\infty \]

B)

\[R\]

C)

\[2R\]

D)

\[3R\]

View Answer
22) A wire of resistance\[1\,\Omega \]is stretched to double its length. The resistance of the wire will become

A)

\[1\,\Omega \]

B)

\[\frac{1}{4}\,\Omega \]

C)

\[2\,\Omega \]

D)

\[4\,\Omega \]

View Answer
23) The electric field in a region is radially outward with magnitude\[E=Ar\]. The charge contained in a sphere of radius\[{{r}_{0}}\]centered at the origin is

A)

\[\frac{1}{4\pi {{\varepsilon }_{0}}}Ar_{0}^{3}\]

B)

\[4\pi {{\varepsilon }_{0}}\,Ar_{0}^{3}\]

C)

\[\frac{4\pi {{\varepsilon }_{0}}A}{r_{0}^{3}}\]

D)

\[\frac{1}{4\pi {{\varepsilon }_{0}}}.\frac{A}{r_{0}^{3}}\]

View Answer
24) If a slab of insulating material\[4\times {{10}^{-3}}\]m thick is introduced between the plates of a parallel plate capacitor, the separation between plates has to be increased by\[3.5\times {{10}^{-3}}\]m to restore the capacity to original value. The dielectric constant of the material will be

A)

6

B)

8

C)

10

D)

12

View Answer
25) What is the potential energy of the equal positive point charges of\[1\,\mu C\]each held 1 m apart in air?

A)

\[9\times {{10}^{-3}}J\]

B)

\[9\times {{10}^{-3}}eV\]

C)

\[1J\]

D)

zero

View Answer
26) A whistle of frequency 500 Hz tied to the end of a string of length 1.2 m revolves at 400 revolutions per minute. If the velocity of sound is 340 m/sec, a listener standing some distance away in the plane of rotation of the whistle hears the frequencies in the range

A)

436 to 586 Hz

B)

426 to 574 Hz

C)

436 to 574 Hz

D)

426 to 586 Hz

View Answer
27) A stationary wave is expressed as \[y=4\sin \left( \frac{\pi x}{3} \right)\cos (40\pi t)\] where\[x\] and y are measured in cm and time t in second. The separation between consecutive nodes is

A)

1.5 cm

B)

6 cm

C)

12 cm

D)

3 cm

View Answer
28) A\[1.00\times {{10}^{-20}}kg\]particle is vibrating with simple harmonic motion with a period of\[1.00\times {{10}^{-5}}\]s and a maximum speed of\[1.00\times {{10}^{3}}m/s\]. The maximum displacement of the particle is

A)

1.59mm

B)

1.00m

C)

10 m

D)

none of the above

View Answer
29) A Simple harmonic wave is represented by the relation\[y=a\sin 2\pi \left( pt-\frac{x}{\lambda } \right)\]where a and y are measured in cm and time\[t\]in seconds. The maximum particle velocity is five times the wave velocity. The wavelength of the wave is

A)

\[\frac{2\pi a}{\sqrt{5}}cm\]

B)

\[\frac{2\pi a}{5}cm\]

C)

\[\frac{\pi a}{5}cm\]

D)

\[2\sqrt{5}\pi a\,cm\]

View Answer
30) A slab of thickness\[{{d}_{1}}\]and coefficient of thermal conductivity\[{{K}_{1}}\]. is placed in contact with another slab of thickness\[{{d}_{2}}\]and coefficient of thermal conductivity\[{{K}_{2}}\]. In steady state, the conductivity of composite slab will be

A)

\[\frac{{{d}_{1}}+{{d}_{2}}}{{{K}_{1}}+{{K}_{2}}}\]

B)

\[\frac{{{K}_{1}}{{K}_{2}}}{{{K}_{1}}{{d}_{2}}+{{K}_{2}}{{d}_{1}}}\]

C)

\[\frac{{{K}_{1}}{{d}_{1}}+{{K}_{2}}{{d}_{2}}}{{{d}_{1}}+{{d}_{2}}}\]

D)

\[\frac{{{d}_{1}}+{{d}_{2}}}{\left( \frac{{{d}_{1}}}{{{K}_{1}}}+\frac{{{d}_{2}}}{{{K}_{2}}} \right)}\]

View Answer
31) What is the frequency of radio waves corresponding to 10 m wavelength?

A)

\[3\times {{10}^{9}}Hz\]

B)

\[3.3\times {{10}^{-8}}Hz\]

C)

\[3\times {{10}^{7}}Hz\]

D)

\[3.4\times {{10}^{-7}}Hz\]

View Answer
32) A monochromatic light beam of wavelength 2537 A is falling normally on a metal plate. If the maximum velocity of emitted photoelectron is \[1.6\times {{10}^{5}}m/sec\] and a constant magnetic field of strength \[{{10}^{-4}}\] \[weber/{{m}^{2}}\]is applied parallel to metal surface, the radius of the largest circular path of photoelectrons is

A)

0.61 m

B)

0.61 cm

C)

\[6.1\times {{10}^{-4}}m\]

D)

\[6.1\times {{10}^{-5}}m\]

View Answer
33) Suppose electromagnetic waves having speed \[2.5\times {{10}^{8}}\]m/sec are travelling in a medium of relative permeability 0.8. The relative permitivity is

A)

1.0

B)

1.8

C)

2.5

D)

none of these

View Answer
34) The effective value of A.C. in a circuit is 10 A. The peak value of current is

A)

5 A

B)

0.707 A

C)

10 A

D)

14.14 A

View Answer
35) An LC circuit contains a 40 mH inductor and a \[25\,\mu F\]capacitor. The resistance of the circuit is negligible. The energy stored in the circuit is completely magnetic at times (in milliseconds). The time is measured from the instant the circuit is closed

A)

0, 3.14, 6.28

B)

0, 1.57, 4.71

C)

1.57, 4.71, 7.85

D)

none of the above

View Answer
36) A cyclotron is accelerating proton, where the applied magnetic field is 2 T, the potential gap is 100 kV then how much turn the proton has to move between the dees to acquire a kinetic energy of 20 MeV

A)

100

B)

150

C)

200

D)

300

View Answer
37) The magnetic induction in the region between the pole faces of an electromagnet is 0.7 weber/\[{{m}^{2}}\]. The induced e.m.f. in a straight conductor 10 cm long, perpendicular to B and moving perpendicular both to magnetic induction and its own length with a velocity 2 m/sec is

A)

0.08 V

B)

0.14V

C)

0.35 V

D)

0.07 V

View Answer
38) A circular coil of diameter 7cm has 24 turns of wire carrying current of 0.75A. The magnetic moment of the coil is

A)

\[6.9\times {{10}^{-2}}A{{m}^{2}}\]

B)

\[2.3\times {{10}^{-2}}A{{m}^{2}}\]

C)

\[{{10}^{-2}}A{{m}^{2}}\]

D)

\[{{10}^{-3}}A{{m}^{2}}\]

View Answer
39) A certain current passing through a copper voltameter deposits 0.002 kg of copper on cathode plate in 100 minutes. If there are\[{{10}^{25}}\] copper atoms in 1kg of copper, the electric charge delivered to cathode by copper ions\[(C{{u}^{2+}})\]per second will be

A)

1.06 C

B)

2.13 C

C)

0.53 C

D)

0.71 C

View Answer
40) A current\[i\]passes through a wire of length\[l\], radius of cross-section r, and resistivity \[\rho \]. The rate of heat generation is

A)

\[\frac{{{i}^{2}}l\rho }{\pi {{r}^{2}}}\]

B)

\[{{i}^{2}}{{\left( \frac{l\rho }{\pi {{r}^{2}}} \right)}^{2}}\]

C)

\[{{i}^{2}}l\rho /r\]

D)

\[il\rho /r\]

View Answer
41) The star Sirius is emitting radiation with the radiant intensity (energy emitted per unit area per second) of\[1.2\times {{10}^{7}}W/{{m}^{2}}\]the colour of this star will be

A)

blue

B)

yellow

C)

green

D)

red

View Answer
42) Transistors provide good power amplification when they are used in

A)

common emitter configuration

B)

common base configuration

C)

common collector configuration

D)

none of the above

View Answer
43) The following combination of gates is equivalent to which of the following gate

A)

XOR

B)

OR

C)

NAND

D)

none of the above

View Answer
44) When a hydrogen atom is raised from the ground state to an excited state

A)

both kinetic energy and potential energy increase

B)

both kinetic energy and potential energy decrease

C)

potential energy increases, kinetic energy decreases

D)

potential energy decreases, kinetic energy increases

View Answer
45) A freshly prepared radioactive substance of half-life half an hour emits radiation of intensity thirty two times the permissible safe limit. The minimum time after which it would be safe to work with the substance is

A)

3 hours

B)

6 hours

C)

2 hours

D)

8 hours

View Answer
46) Consider the following two statements [A] Energy spectrum of a particles emitted in radioactive decay is discrete [B] Energy spectrum of P particles emitted in radioactive decay is continuous

A)

only A is correct

B)

only B is correct

C)

A is correct but B is wrong

D)

both A and B are correct

View Answer
47) An oil drop having charge 2e is kept stationary between two parallel horizontal plates 2.0 cm apart when a potential difference of 12000 volts is applied between them. If the density of oil is\[900\text{ }kg/{{m}^{3}}\], the radius of the drop will be

A)

\[2.0\times {{10}^{-6}}m\]

B)

\[1.7\times {{10}^{-6}}m\]

C)

\[1.4\times {{10}^{-6}}m\]

D)

\[1.1\times {{10}^{-6}}m\]

View Answer
48) Energy required to remove an electron from aluminium surface is 4.2 eV. If light of wavelength 2000 A falls on the surface, the velocity of the fastest electron ejected from the surface will be

A)

\[8.4\times {{10}^{5}}\]m/second

B)

\[7.4\times {{10}^{5}}\]m/second

C)

\[6.4\times {{10}^{5}}\]m/second

D)

\[8.4\times {{10}^{6}}\]m/second

View Answer
49) A convex lens is used to form real image of an object on a screen. It is observed that even when the positions of the object and the screen are fixed there are two positions of the lens to form real images. If the heights of the images are 4 cm and 9cm respectively, the height of the objective is;

A)

2.25 cm

B)

6.00 cm

C)

6.50 cm

D)

36.00 cm

View Answer
50) A compound microscope is 20 cm long and the power of its eye-piece is 20 D. If the objective is bi-convex (radius of curvature of either surface 2 cm) and made of a material of = 1.5, the magnifying power of the microscope is

A)

54

B)

60

C)

13.5

D)

41.5

View Answer
51) The internal energy of a system is the sum of

A)

vibrational energy and electronic energy

B)

vibrational energy and rotational energy

C)

vibrational energy, rotational energy, electronic energy and translational energy

D)

rotational energy and electronic energy

View Answer
52) The maximum number of permissible rotational orientations of the Is electron of lithium atom in ground state is

A)

1

B)

2

C)

3

D)

4

View Answer
53) Which of the following is the correct bond order for\[N_{2}^{2-}\]ion?

A)

2.5

B)

2.0

C)

3.0

D)

1.5

View Answer
54) Of the following iso-electronic ions, the one which has the lowest ionization potential is

A)

\[N{{a}^{+}}\]

B)

\[M{{g}^{++}}\]

C)

\[{{F}^{-}}\]

D)

\[{{O}^{--}}\]

View Answer
55) What is the effect of more electronegative atom on the strength of ionic bond?

A)

decreases

B)

increases

C)

remains same

D)

any one of these

View Answer
56) If we consider the ammonia molecule to be \[s{{p}^{3}}\] hybridized, the lone pair will occupy

A)

an s-orbital

B)

a p-orbital

C)

a\[s{{p}^{2}}-\]hybridized orbital

D)

a\[s{{p}^{3}}-\]hybridized orbital

View Answer
57) Rate constants of some reactions are given below. Predict which one indicates third order of reaction?

A)

\[k=8.7\times {{10}^{-3}}mo{{l}^{-1}}L{{s}^{-1}}\]

B)

\[k=6.5\times {{10}^{-4}}mol{{L}^{-1}}{{s}^{-1}}\]

C)

\[k=5.3\times {{10}^{-5}}{{s}^{-1}}\]

D)

\[k=2.52\times {{10}^{-32}}mo{{l}^{-2}}{{L}^{2}}{{s}^{-1}}\]

View Answer
58) A zinc rod is placed in 0.095 M solution of zinc sulphate at 298 K, the potential of the electrode at this temperature is[\[E_{Zn}^{o}=-0.76\]volts]

A)

\[-0.79\]volts

B)

\[-0.69\]volts

C)

\[-0.59\]volts

D)

\[-0.49\]volts

View Answer
59) Which of the following hydrogen bonds are strongest in vapour phase?

A)

\[HF---HF\]

B)

\[HF---HCl\]

C)

\[HCl---HCl\]

D)

\[HF---HI\]

View Answer
60) A primary alcohol,\[{{C}_{3}}{{H}_{8}}O\] on heating with sulphuric acid undergo dehydration to give an alkene, B.B when reacted with\[HCl\]gave C, which on treatment with aqueous KOH gives compound \[D,{{C}_{3}}{{H}_{8}}O.A\]and D are

A)

functional isomers

B)

position isomers

C)

chain isomers

D)

stereo isomers

View Answer
61) In the series of bivalent hydrides of sixteenth group elements

A)

volatility increases from\[{{H}_{2}}O\]to\[{{H}_{2}}S\]and then decreases

B)

volatility increases from\[{{H}_{2}}O\]to \[{{H}_{2}}Se\]

C)

volatility decreases from\[{{H}_{2}}O\]to\[{{H}_{2}}Se\]

D)

none of the above

View Answer
62) Of the aliphatic compound carrying the following functional groups the one which cannot exhibit position isomerism is

A)

carbon-carbon double bond

B)

carbon-carbon triple bond

C)

keto group

D)

carboxylic acid group

View Answer
63) When ethanol is subjected to dehydration in presence of\[{{H}_{2}}S{{O}_{4}},\]the intermediate formed is a

A)

carbonium ion

B)

carbanion

C)

radical

D)

carbine

View Answer
64) Which of the following can act as an acid and as a base?

A)

\[HCO_{3}^{-}\]

B)

\[{{H}_{2}}PO_{4}^{-}\]

C)

Both (a) and (b)

D)

None of these

View Answer
65) \[200\text{ }c{{m}^{3}}\]of an aqueous solution of a protein contains 1.26 g. of protein. The O.P. of such a solution at 300 K is found to be\[2.57\times {{10}^{-3}}\]atm. Molar mass of protein is

A)

\[60287\text{ }g.mo{{l}^{-1}}\]

B)

\[30242.\text{ }g.mo{{l}^{-1}}\]

C)

\[40404\text{ }g.\text{ }mo{{l}^{-1}}\]

D)

\[50404\text{ }g.\text{ }mo{{l}^{-1}}\]

View Answer
66) What is the magnetic moment for\[M{{n}^{2+}}\]ion in low spin state?

A)

5.90 BM

B)

8.90 BM

C)

2.8 BM

D)

1.73 BM

View Answer
67) On mole of a gas absorbs 300 J of heat at constant volume and its temperature is raised from 30 to\[35{}^\circ C\]. The value of\[\Delta E\]is

A)

300 joules

B)

0.1 joules

C)

150 joules

D)

200 joules

View Answer
68) In which of the following conditions a chemical reaction can not occur?

A)

\[\Delta H\] and\[\Delta S\]increase and\[T\Delta S>\Delta H\]

B)

\[\Delta H\]and\[\Delta S\]decrease and \[\Delta H>T\Delta S\]

C)

\[\Delta H\]increases and\[\Delta S\]increases

D)

\[\Delta H\]decreases and\[\Delta S\]increases

View Answer
69) If the melting point of ice is\[0{}^\circ C\]and latent heat of fusion is\[5.46\text{ }kJ\text{ }mo{{l}^{-1}}\], the entropy change for the conversion of 18 g of ice to water at one atmosphere is

A)

\[5.46\text{ }J{{K}^{-1}}\]

B)

\[20\text{ }J{{K}^{-1}}\]

C)

\[50\text{ }J{{K}^{-1}}\]

D)

\[\text{360 }J{{K}^{-1}}\]

View Answer
70) Calculate the uncertainty in the velocity of a cricket ball of 100 g if the uncertainty in its position is\[1.65\text{ }\overset{o}{\mathop{\text{A}}}\,\].

A)

\[1.657\pi \times {{10}^{-43}}m/s\]

B)

\[\frac{6.6}{\pi }\times {{10}^{-45}}m/s\]

C)

\[\frac{{{10}^{-23}}}{\pi }m/s\]

D)

\[\frac{{{10}^{-26}}}{\pi }m/s\]

View Answer
71) The correct order of basicity of amines in water is

A)

\[C{{H}_{3}}N{{H}_{2}}>{{(C{{H}_{3}})}_{2}}NH>{{(C{{H}_{3}})}_{3}}N\]

B)

\[{{(C{{H}_{3}})}_{3}}N>{{(C{{H}_{3}})}_{2}}NH>C{{H}_{3}}N{{H}_{2}}\]

C)

\[{{(C{{H}_{3}})}_{2}}NH>{{(C{{H}_{3}})}_{3}}N>C{{H}_{3}}N{{H}_{2}}\]

D)

none of the above

View Answer
72) Solubility of lead chloride is K. Then the number of moles of \[C{{l}^{-}}\]ionsin 1000 ml of saturated lead chloride solution will be

A)

\[{{\left( \frac{K}{4} \right)}^{1/3}}\]

B)

\[{{(2K)}^{1/3}}\]

C)

\[{{K}^{1/2}}\]

D)

\[\frac{K}{2}\]

View Answer
73) The compounds that will undergo Cannizzaro reaction are 1. \[C{{H}_{3}}CHO\] 2. \[{{(C{{H}_{3}})}_{3}}CCHO\] 3. \[PhCHO\] 4. \[C{{H}_{3}}COC{{H}_{3}}\]

A)

1 and 2

B)

1 and 3

C)

2 and 3

D)

2 and 4

View Answer
74) The freezing point of a 0.01 m aqueous glucose solution at 1 atmosphere is\[-0.18{}^\circ C\]. To it, an addition of equal volume of 0.002 m glucose solution will produce a solution with freezing point of nearly

A)

\[-0.036{}^\circ C\]

B)

\[-0.108{}^\circ C\]

C)

\[-0.216{}^\circ C\]

D)

\[-0.422{}^\circ C\]

View Answer
75) 60 J of heat flows out from 600 g. of\[{{H}_{2}}O\]at \[30{}^\circ C\]into the surroundings at\[25{}^\circ C\]. The total entropy change in the universe due to this process is

A)

\[0.1\text{ }J{{K}^{-1}}\]

B)

\[0.5\text{ }J{{K}^{-1}}\]

C)

\[0.9J{{K}^{-1}}\]

D)

\[1.0\text{ }J{{K}^{-1}}\]

View Answer
76) Which of the following is a better electron pair donor?

A)

\[P{{(C{{H}_{3}})}_{3}}\]

B)

\[P{{H}_{3}}\]

C)

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

D)

\[N{{H}_{3}}\]

View Answer
77) The compounds that will give an isomer of 2,2- dimethylpropane on catalytic hydrogenation are (1) \[C{{H}_{3}}CH=\underset{\begin{smallmatrix} | \\ C{{H}_{3}} \end{smallmatrix}}{\mathop{C}}\,-C{{H}_{3}}\] (2) \[C{{H}_{3}}CH=CHC{{H}_{3}}\] (3) \[C{{H}_{3}}CH=CHC{{H}_{2}}C{{H}_{3}}\] (4) \[C{{H}_{3}}\underset{\begin{smallmatrix} | \\ C{{H}_{3}} \end{smallmatrix}}{\mathop{C}}\,=\underset{\begin{smallmatrix} | \\ C{{H}_{3}} \end{smallmatrix}}{\mathop{C}}\,-C{{H}_{3}}\]

A)

1 and 4

B)

2 and 4

C)

1 and 3

D)

1 and 2

View Answer
78) What is the correct mode of hybridization of the central atom in the following compounds?

A)

\[NO_{2}^{+}\]    -     \[s{{p}^{2}}\]        \[S{{F}_{4}}\]    -    \[s{{p}^{3}}\]           \[PF_{6}^{-}\]    -    \[{{d}^{2}}s{{p}^{3}}\]

B)

\[NO_{2}^{+}\]    -     \[s{{p}^{3}}\]        \[S{{F}_{4}}\]    -    \[s{{p}^{3}}{{d}^{2}}\]        \[PF_{6}^{-}\]    -    \[s{{p}^{3}}{{d}^{2}}\]

C)

\[NO_{2}^{+}\]    -     \[sp\]          \[S{{F}_{4}}\]    -    \[s{{p}^{3}}d\]          \[PF_{6}^{-}\]    -    \[s{{p}^{3}}{{d}^{2}}\]

D)

\[NO_{2}^{+}\]    -     \[sp\]        \[S{{F}_{4}}\]    -    \[s{{p}^{2}}\]            \[PF_{6}^{-}\]    -    \[s{{p}^{3}}\]

View Answer
79) Which of the following statements is correct?

A)

\[S{{F}_{4}}\]is polar and nonreactive

B)

\[S{{F}_{6}}\]is nonpolar and very reactive

C)

\[S{{F}_{6}}\]is a strong fluorinating agent

D)

\[S{{F}_{4}}\]is prepared by fluorinating\[SC{{l}_{2}}\]with\[NaF\]

View Answer
80) An ionic compound\[XY\]has a structure of ZnS type. If the radius of\[{{X}^{+}}\]is 22.5 pm. The ideal radius of\[Y-\]will be

A)

100 pm

B)

50 pm

C)

20 pm

D)

30 pm

View Answer
81) The pH of a soft drink is 3.82. The hydrogen ion concentration of the drink is (Antilog 0.18=1.5)

A)

\[1.96\times {{10}^{-2}}mole\text{ }li{{t}^{-1}}\]

B)

\[1.96\times {{10}^{-3}}mole\text{ }li{{t}^{-1}}\]

C)

\[1.5\times {{10}^{-4}}mole\text{ }li{{t}^{-1}}\]

D)

\[1.5\times {{10}^{-3}}mole\text{ }li{{t}^{-1}}\]

View Answer
82) If an amide is treated with\[{{P}_{2}}{{O}_{5}}\]the likely product is an

A)

acid

B)

alkyl cyanide

C)

amine

D)

acid anhydride

View Answer
83) The polymer used for making contact lenses for eyes is

A)

poly methyl methacrylate

B)

polyethylene

C)

polyethyl acrylate

D)

nylon 6

View Answer
84) Silver sulphide dissolves in a solution of sodium cyanide to form the complex

A)

\[Na[Ag{{(CN)}_{2}}]\]

B)

\[N{{a}_{3}}[Ag{{(CN)}_{4}}]\]

C)

\[N{{a}_{5}}[Ag{{(CN)}_{6}}]\]

D)

\[N{{a}_{2}}[Ag{{(CN)}_{2}}]\]

View Answer
85) The compound that can be formed by aldol condensation of acetaldehyde is

A)

\[C{{H}_{3}}-\underset{\begin{smallmatrix} || \\ O \end{smallmatrix}}{\mathop{C}}\,-C{{H}_{2}}-\underset{\begin{smallmatrix} || \\ O \end{smallmatrix}}{\mathop{C}}\,-H\]

B)

\[C{{H}_{3}}-\underset{\begin{smallmatrix} || \\ O \end{smallmatrix}}{\mathop{C}}\,-C{{H}_{2}}-COOH\]

C)

\[C{{H}_{3}}-C{{H}_{2}}-\underset{\begin{smallmatrix} | \\ OH \end{smallmatrix}}{\mathop{CH}}\,-\underset{\begin{smallmatrix} || \\ O \end{smallmatrix}}{\mathop{C}}\,-H\]

D)

\[C{{H}_{3}}-\underset{\begin{smallmatrix} | \\ OH \end{smallmatrix}}{\mathop{CH}}\,-C{{H}_{2}}-\underset{\begin{smallmatrix} || \\ O \end{smallmatrix}}{\mathop{C}}\,-H\]

View Answer
86) Phenol is less acidic than

A)

acetylene

B)

para methoxy phenol

C)

ethanol

D)

para nitro phenol

View Answer
87) In a\[{{H}_{2}}{{O}_{2}}\]fuel cell, 67.2 litre of\[{{H}_{2}}\]at STP react in 10 minutes as per following reaction- Anode \[{{H}_{2}}+2O{{H}^{-}}\to 2{{H}_{2}}O+2{{e}^{-}}\] Cathode \[{{O}_{2}}+2{{H}_{2}}O+2{{e}^{-}}\to 4O{{H}^{-}}\] The average current produced by the fuel cell will be

A)

5 milliampere

B)

10 milliampere

C)

482.7 ampere

D)

965.4 ampere

View Answer
88) The element of atomic number 11 is highly reactive, which of the following elements will be most likely to be reactive metal?

A)

Elementwithat.no. 17

B)

Element with at. no. 24

C)

Element with at. no. 37

D)

Element with at. no. 54

View Answer
89) What type of hybridization is involved in \[{{[Fe{{(CN)}_{6}}]}^{3-}}\]

A)

\[{{d}^{2}}s{{p}^{3}}\]

B)

\[ds{{p}^{2}}\]

C)

\[s{{p}^{3}}{{d}^{3}}\]

D)

\[ds{{p}^{3}}\]

View Answer
90) Molar conductivity of a solution of an electrolyte\[A{{B}_{2}}\]is\[160\text{ }oh{{m}^{-1}}c{{m}^{2}}mo{{l}^{-1}}\]. If it ionizes as\[A{{B}_{2}}\to {{A}^{+2}}+2{{B}^{-1}}\]. Its equivalent conductivity will be

A)

\[150\text{ }oh{{m}^{-1}}c{{m}^{-1}}mo{{l}^{-1}}\]

B)

\[\text{75 }oh{{m}^{-1}}c{{m}^{-1}}mo{{l}^{-1}}\]

C)

\[\text{80 }oh{{m}^{-1}}c{{m}^{-1}}mo{{l}^{-1}}\]

D)

all of the above

View Answer
91) In\[{{S}_{N}}2\]reactions the sequence of bond breaking and bond formation is as follows

A)

bond breaking is followed by formation

B)

bond formation is followed by breaking

C)

bond breaking and formation are simultaneous

D)

bond breaking and formation take place randomly

View Answer
92) Which of the following on nuclear bromination can yield only one monobromo derivative?

A)

ortho xylene

B)

meta xylene

C)

para xylene

D)

toluene

View Answer
93) Which of the following shows highest magnetic moment?

A)

\[{{V}^{3+}}\]

B)

\[C{{r}^{3+}}\]

C)

\[M{{n}^{2+}}\]

D)

\[F{{e}^{2+}}\]

View Answer
94) Which of the following can exhibit keto-enol tautomerism?

A)

\[C{{H}_{3}}-\overset{\begin{smallmatrix} O \\ || \end{smallmatrix}}{\mathop{C}}\,-H\]

B)

\[CC{{l}_{3}}-\underset{\begin{smallmatrix} || \\ O \end{smallmatrix}}{\mathop{C}}\,-H\]

C)

\[H-\underset{\begin{smallmatrix} || \\ O \end{smallmatrix}}{\mathop{C}}\,-H\]

D)

\[{{(C{{H}_{3}})}_{3}}C-\underset{\begin{smallmatrix} || \\ O \end{smallmatrix}}{\mathop{C}}\,-H\]

View Answer
95) CP-LCN is known as acetonitrile because

A)

it contains an aceto group

B)

on hydrolysis it gives acetic acid

C)

acetic acid is converted to it by direct reaction with HCN

D)

acetyl chloride on reaction with HCN gives the compound

View Answer
96) In the following four compounds, the one which is a functional isomer of the set of other three is

A)

B)

C)

D)

View Answer
97) Diethyl ether is isomeric with

A)

primary alcohol

B)

secondary alcohol

C)

tert. alcohol

D)

all of these

View Answer
98) The same quantity of electricity was passed through salt solutions of silver (at. wt. = 107.9) and gold (at. wt. = 197). If 1.439 g of Ag and 0.876 g of Au were deposited, the oxidation state of Au in the salt is

A)

zero

B)

+2

C)

+3

D)

+1

View Answer
99) \[{{H}_{2}}S\]acts only as a reducing agent while\[S{{O}_{2}},\]can act both as a reducing and oxidizing agent because

A)

S in\[{{H}_{2}}S\]has -2 oxidation state

B)

S in\[S{{O}_{2}}\]has oxidation state\[+4\]

C)

hydrogen in\[{{H}_{2}}S\]is more +ve than oxygen in\[S{{O}_{2}}\]

D)

oxygen is more -ve in\[S{{O}_{2}}\]

View Answer
100) In the equilibrium \[{{A}^{-}}+{{H}_{2}}O\rightleftharpoons HA+O{{H}^{-}}\] \[({{K}_{a}}=1.0\times {{10}^{-5}})\] The degree of hydrolysis of 0.001 M solution of the salt is

A)

\[{{10}^{-3}}\]

B)

\[{{10}^{-4}}\]

C)

\[{{10}^{-5}}\]

D)

\[{{10}^{-6}}\]

View Answer
101) A situation where one population is benefitted while the other unaffected is referred as

A)

commensalism

B)

parasitism

C)

amensalism

D)

symphily.

View Answer
102) Which of the following is incorrect?

A)

iodine is needed for thyroxine formation

B)

calcium regulates the excitibility of nerve fibres ag

C)

potassium plays an important role in the regulation of acid-base balance in cell

D)

phosphorous helps to maintain the osmotic pressure of the body fluids.

View Answer
103) The first antibody which gets formed in response to an antigen is

A)

\[IgM\]

B)

\[IgG\]

C)

\[IgA\]

D)

none of these.

View Answer
104) Megakaryocytes are the

A)

cells found between the spaces in the lamellae of compact bone tissues

B)

cells of bone marrow which give rise to thrombocytes

C)

phagocytes found in the lymph

D)

another name for thrombocytes.

View Answer
105) The hepatic cells which act as phagocytes are

A)

Hansens cells

B)

acinar cells

C)

Kupffer cells

D)

none of these.

View Answer
106) Which of the following is incorrect sequence in classification?

A)

amphibia-anura-frog

B)

reptilia-squamata-ophidia-shake

C)

aves-neognathae-passeriformes-sparrow

D)

mammalia-eutheria-artiodactyla-horse.

View Answer
107) Sea lilies are

A)

echinoderms

B)

coelenterates

C)

rotifers

D)

aquatic plants.

View Answer
108) Enterogastrone secretion is induced by

A)

bile

B)

fatty acids.

C)

\[HCl\]

D)

pancreatic juice

View Answer
109) Binding of ATP to myosin required the cofactor

A)

Mg

B)

Na

C)

K

D)

Ca.

View Answer
110) Cumulus cells are generally found around

A)

corpus luteum

B)

ovulated eggs

C)

ovary

D)

uterus.

View Answer
111) Which of the following chambers of ruminant stomach contains the gastric juice?

A)

abomasum

B)

omasum

C)

rumen

D)

reticulum.

View Answer
112) The embryonic skeleton is formed by

A)

white fibrous cartilage

B)

elastic cartilage

C)

hyaline cartilage

D)

none of the above.

View Answer
113) Reticular tissue forms the supporting frame work of

A)

bone marrow

B)

lymph gland

C)

spleen

D)

all of these.

View Answer
114) Which of the following organisms causes the sexual disease syphilis?

A)

Neisseria gonorrhoae

B)

Treponema pallidum

C)

Pasteurella pestis

D)

Clostrldium botulinum.

View Answer
115) The process by which new alleles of a gene are produced is termed as

A)

point mutation

B)

gene manipulation

C)

para mutation

D)

forward mutation.

View Answer
116) Deposition of uric acid crystals within the synovial joint causes as

A)

osteoarthritis

B)

rheumatoid arthritis

C)

gout

D)

paralysis.

View Answer
117) Aromatic amines used in the manufacture of synthetic dyes cause cancer of the

A)

skin

B)

lung

C)

liver

D)

urinary bladder.

View Answer
118) Allergic reaction can be controlled by

A)

antibiotics

B)

histamines

C)

antihistamines

D)

none of the above.

View Answer
119) Hepatitis B is transmitted through

A)

blood transfusion

B)

intimate physical contact

C)

sexually

D)

all of the above.

View Answer
120) The hereditary disease in which the urine of a person turns black on exposure to air due to the presence of homogentisic acid is known as

A)

ketonuria

B)

phenylketonuria

C)

haematuria

D)

alkaptonuria.

View Answer
121) Centre for thermoregulation is located in

A)

anterior pituitary

B)

hypothalamus

C)

kidney

D)

heart.

View Answer
122) In prokaryotes, DNA replication occurs

A)

at the time of cytokinesis

B)

soon after cytokinesis

C)

well before cytokinesis

D)

long after cytokinesis.

View Answer
123) Which of the following is the abundant protein in human body?

A)

haemoglobin

B)

myoglobin

C)

\[\alpha -\]keratin

D)

collagen.

View Answer
124) In zoological nomenclature the sub-species is represented by

A)

trinomen

B)

binomen

C)

uninomen

D)

none of these.

View Answer
125) Miller and Ureys experiment in its created atmosphere employed

A)

oxygen, ammonia, methane and water

B)

hydrogen, ammonia, methane and water

C)

hydrogen, ammonia, ethane and water

D)

hydrogen, oxygen, nitrogen and water.

View Answer
126) Most fossils have been found in

A)

black soil

B)

lava flows

C)

granite

D)

sedimentary rocks.

View Answer
127) The Nobel Prize for medicine in 1998 was won by

A)

Ferid Murad

B)

Jon Watson

C)

V.M. Ingram

D)

Southerland.

View Answer
128) Coelomoducts are the excretory organs in

A)

earthworm

B)

Hydra

C)

Planaria

D)

none of these.

View Answer
129) Athletes generally suffer from

A)

tachycardia

B)

bradycardia

C)

dyspnoea

D)

cardiac arrythmias.

View Answer
130) Which of the following vitamins serves as a coenzyme in transamination and decarboxylation of amino acid?

A)

pantothenic acid

B)

folic acid

C)

pyridoxine

D)

niacin.

View Answer
131) Cholecystectomy (removal of gall bladder) results in

A)

gastric cramps

B)

impaired fat digestion

C)

perpetual indigestion

D)

no appreciable change.

View Answer
132) The protein most extensively studied in age-related changes is

A)

myosin

B)

actin

C)

collagen

D)

tubulin.

View Answer
133) In saltatory conduction of impulse

A)

time is conserved

B)

energy is conserved

C)

both time and energy are conserved

D)

neither time nor energy is conserved.

View Answer
134) Podocytes are associated with

A)

muscle fibres

B)

auditory canal

C)

neuron

D)

nephron.

View Answer
135) Excretion of potassium is governed primarily by

A)

potassium reabsorption in proximal convoluted tubule

B)

potassium secretion in proximal convoluted tubule

C)

potassium secretion in distal convoluted tubule

D)

potassium reabsorption in distal convoluted tubule.

View Answer
136) Ribosomes are made up of

A)

\[tRNA\] and protein

B)

\[rRNA\]and protein

C)

\[mRNA\]and protein

D)

\[mRNA\] and DNA.

View Answer
137) Duchenne muscular dystrophy, a sex-linked inheritance, is characterized by

A)

sex ratio disorder

B)

wasting away of muscles

C)

inevitable death

D)

all of the above.

View Answer
138) In transcription, anticodon is seen in

A)

\[tRNA\]

B)

\[rRNA\]

C)

\[mRNA\]

D)

DNA.

View Answer
139) In ECG, P-R interval corresponds to

A)

time delay in\[A-V\]node

B)

\[S-A\]nodal conduction time

C)

increased ventricular contraction

D)

time interval between onset of ventricular contraction.

View Answer
140) During oogenesis the second meiotic division occurs

A)

before ovulation

B)

after fertilization

C)

just before fertilization

D)

immediately after fertilization.

View Answer
141) Human eye is sensitive to wavelength in the range of

A)

300-390 nanometer

B)

380-760 nanometer a

C)

790-800 nanometer

D)

300-360 nanometer.

View Answer
142) Which of the hormones is a polypeptide

A)

LH

B)

FSH

C)

insulin

D)

thyroxine.

View Answer
143) Thyroid hormone has regulatory effect on

A)

protein metabolism

B)

carbohydrate metabolism

C)

fat metabolism

D)

all of the above.

View Answer
144) Which of the following is glycoprotein?

A)

haemoglobin

B)

casein

C)

egg albumin

D)

gelatin

View Answer
145) A complete catalytically active enzyme together with its coenzyme is termed as

A)

apoenzyme

B)

holoenzyme

C)

isozyme

D)

lysozyme.

View Answer
146) Excessive nutrient load in a water body leads to its

A)

nitrification

B)

eutrophication

C)

glaciation

D)

purification.

View Answer
147) The stable community structure of an ecosystem is termed as

A)

dominant community

B)

biocommunity

C)

domicile factor

D)

climax community.

View Answer
148) The Periyar sanctuary is famous for

A)

elephants

B)

wild bears

C)

swamp deers

D)

antelopes.

View Answer
149) The movement of oxygen from alveoli into the blood in pulmonary capillaries is through

A)

active transport

B)

facilitated transport

C)

passive transport

D)

none of these.

View Answer
150) Which of the following are osmoconformers?

A)

bony fishes

B)

elasmobranche

C)

hagflshes

D)

Lampreys.

View Answer
151) Specific proteins responsible for the flow of materials and information into the cell are called

A)

membrane receptors

B)

carrier proteins

C)

integral proteins

D)

none of these.

View Answer
152) Proteins that are embedded in the liqid layer of biomembranes are called

A)

intrinsic

B)

extrinsic

C)

peripheral

D)

none of these

View Answer
153) The fluid-mosaic model of biomembrane was proposed by

A)

Waston and Crick

B)

Singer and Nicholson

C)

Danielli and Davson

D)

none of the above

View Answer
154) The thickness of cell membranes varies between 6-9

A)

millimeters

B)

micrometers

C)

nanometers

D)

picometers

View Answer
155) The percentage of proteins in the mitochondrial membrane is

A)

20

B)

50

C)

80

D)

100.

View Answer
156) The\[N{{a}^{+}}/{{K}^{+}}\]pump transports

A)

\[3N{{a}^{+}}\]into and\[2{{K}^{+}}\]out of cell

B)

\[2N{{a}^{+}}\]into and\[2{{K}^{+}}\]out of cell

C)

\[3N{{a}^{+}}\]out of and\[3{{K}^{+}}\]into cell

D)

\[3N{{a}^{+}}\] out and\[2{{K}^{+}}\]into cell.

View Answer
157) The bounding layer of protoplasm is called

A)

ectoplasm

B)

ectoderm

C)

endoplasm

D)

none of these.

View Answer
158) The maintenance of a steady and stable internal environment in an organism is called

A)

equilibrium

B)

adaptation

C)

homeostasis

D)

all of these.

View Answer
159) One of the sciences for which training in biology is essential namely the science of treating diseases with drugs or curative substances, is called

A)

pest control

B)

physiotherapy

C)

medicine

D)

pharmacy.

View Answer
160) Roughly speaking, the ratio of present day species of plants to animals is

A)

\[\begin{matrix}    1.0 & 0.04 \\ \end{matrix}\]

B)

\[\begin{matrix}    1.0 & 0.4 \\ \end{matrix}\]

C)

\[\begin{matrix}    1.0 & 1.4 \\ \end{matrix}\]

D)

\[\begin{matrix}    1.0 & 2.4 \\ \end{matrix}\]

View Answer
161) As they release hydrolases that digest old and damaged cells, the term suicide bags is aptly used by cell biologists for

A)

golgi bodies

B)

lysosomes

C)

glyoxisomes

D)

peroxisomes.

View Answer
162) The conspicuous protein-storing layer of endosperm in cereal grains Contains

A)

ribosomes

B)

microbodies

C)

aleurone grains

D)

starch grains.

View Answer
163) Thread like protoplasmic projections on the free surface of absorptive cells (such as intestinal cells) are called

A)

plasmodesmata

B)

microfilaments

C)

cilia

D)

none of these.

View Answer
164) The space separating the two membranes around the nucleus is called

A)

endonuclear space

B)

exonuclear space

C)

matric space

D)

perinuclear space.

View Answer
165) The total number of cells in the human body is at least

A)

\[{{10}^{3}}\]

B)

\[{{10}^{6}}\]

C)

\[{{10}^{9}}\]

D)

none of these.

View Answer
166) The catalase-containing vesicles present in liver and leaf cells are called

A)

glyoxisomes

B)

lysosomes

C)

peroxisomes

D)

polyribosomes.

View Answer
167) Dictyosomes were discovered in 1989 by

A)

Robert Brown

B)

Rudolf Virchow

C)

Robert Hooke

D)

none of these.

View Answer
168) The two cell organelles not enclosed by a membrane are

A)

chloroplast and mitochondrion

B)

nucleus and nucleolus

C)

golgi apparatus and microbodies

D)

none of the above.

View Answer
169) The primary cells wall of plant consist of

A)

cellulose

B)

hemicellulose

C)

pectin

D)

all of these.

View Answer
170) The layer of cell wall common to two adjacent cell wall in plants is called

A)

middle lamella

B)

middle layer

C)

common lamella

D)

common layer.

View Answer
171) The symbiotic association of an algae and a fungus is called

A)

mycorrhiza

B)

fairy ring

C)

lichen

D)

none of these.

View Answer
172) Early and late blight of potato are caused respectively by

A)

Fusarium and Claviceps

B)

Gibberella and Penicillium

C)

Aspergillus and Ustilago

D)

none of the above.

View Answer
173) Fairy Rings in lawns result from outward- spreading circles of mycelia of mushrooms producing, at their periphery, fruiting bodies called

A)

ascocarps

B)

basidiocarps

C)

sorocarps

D)

pseudocarps.

View Answer
174) The phenomenon of sexual reproduction in zygomycetes, dependent upon the successful mating between\[+\]and\[-\]strains, is called

A)

heterothallism

B)

heterosis

C)

heterospory

D)

heterogamy.

View Answer
175) The number of known species of fungi is about

A)

1,000

B)

10,000

C)

1,00,000

D)

10,00,000.

View Answer
176) The rumen of cattle is the site of fermentation of cellulose fibres through the action of

A)

archaebacteria

B)

cyanobacteria

C)

mycoplasmas

D)

spirochaetes.

View Answer
177) An antibiotic not produced by one of the monera (Streptomyces) is

A)

erythromycin

B)

penicillin

C)

streptomycin

D)

tetracycline

View Answer
178) Gram negative heterotrophic bacteria that can biodegrade a variety of natural as well as man- made organic compounds, such as petroleum products, include

A)

cyanobacteria

B)

Clostridia

C)

archaebacteria

D)

none of these.

View Answer
179) Mycoplasmas are also called PPLO, which is an abbreviation of

A)

pentose phosphate-led oxidation

B)

parasitic prokaryote-like organisms

C)

pleuropneumonia and plant-like organisms

D)

pleuropneumonia-like organisms

View Answer
180) The most numerous and ancient, smallest and simplest microscopic organisms belong to which of the following kingdom?

A)

bacteria

B)

fungi

C)

monera

D)

plantae.

View Answer
181) Dodder (Cuscutta sp.) is an exceptional dicotyledon as it

A)

is a parasite

B)

is without leaves

C)

lacks cotyledons

D)

does not produce flowers.

View Answer
182) Chilghoza, a gymnosperm seed, that is eaten as a dry fruit is produced by

A)

Pinus roxburgii

B)

Pinus gerardiana

C)

Ginkgo biloba

D)

Cedrus deofara.

View Answer
183) The seed coat in both gymnosperms and angiosperms is derived from the

A)

megaspore

B)

microspore

C)

megasporangium

D)

microsporangium.

View Answer
184) Conifers have a definite advantage over other plants of the colder regions, due to their sustained photosynthetic activity, being

A)

perennial

B)

tall

C)

evergreen

D)

xerophytic.

View Answer
185) Ciliated reproductive bodies are not found in

A)

Chlamydomonos

B)

Spirogyra

C)

Ulothrix

D)

Volvox.

View Answer
186) The present day higher green plants are believed to have evolved from

A)

ferns

B)

green algae

C)

liverworts

D)

mosses.

View Answer
187) A few exceptional algae are parasitic. They include

A)

Cephaleuros and Harveyella

B)

Sargassum and Spirogyra

C)

Ulothrix and Volvox

D)

Chlamydomonas and Gelidinm.

View Answer
188) The commercially exploited algae include

A)

Caulerpa, Chara and Volvox

B)

Gelidium, Laminaria and Porphyra

C)

Acetabularia, Spirogyra and Ulothrix

D)

all of the above.

View Answer
189) The red colour of rhodophyta is due to the preponderance of

A)

phycobilins

B)

phycocyanin

C)

phycoerythrin

D)

none of these.

View Answer
190) Kingdom plantae comprises multicellular photoautotrophs that are

A)

aquatic

B)

epiphytic

C)

terrestrial

D)

all of these.

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191) The Chipko Movement for conservation of forests was started in 1972 in

A)

North Kanara distric

B)

Silent Valley

C)

Sunderbans

D)

Tehri-Garhwal.

View Answer
192) The government-sponsored programme for growing trees in towns and cities for aesthetic value is called

A)

floriculture

B)

agroforestry

C)

social forestry

D)

urban forestry.

View Answer
193) MAB of UNESCO stands for

A)

man and biodiversity

B)

maintenance of acquired biodiversity

C)

movement for auxiliary biosphere

D)

none of the above.

View Answer
194) The rate of formation of organic molecules in green plants or their populations is called

A)

photosynthetic rate

B)

net assimilation rate

C)

gross primary productivity

D)

net primary productivity.

View Answer
195) The natural cycles of carbon, oxygen, nitrogen, water, phosphorous, sulphur etc. are collectively called as

A)

biochemical cycles

B)

geochemical cycles

C)

material cycles

D)

none of the above.

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196) Recycling of matter occurs between the biotic and abiotic components of the biosphere during the formers

A)

life

B)

death

C)

both [a] and [b]

D)

neither [a] nor [b].

View Answer
197) With regard to materials, the earth and its atmosphere are a closed system. However, a little inflow of material does occur from outer space in the form of

A)

UFOs

B)

cosmic rays

C)

meteros

D)

all of these.

View Answer
198) Biosphere may be defined as

A)

earths hydrosphere, lithosphere and atmosphere

B)

a combination of all ecosystems of the earths environment

C)

the entire inhabited part of the earth and its atmosphere, including living and non-living matter

D)

all of the above

View Answer
199) Of the known flowering plants, the number of species of monocots is a partly

A)

5000

B)

50,000

C)

5,00,000

D)

555,00,000.

View Answer
200) The gymnosperms formed the dominant vegetation on the earth during the geological period called

A)

carboniferous

B)

permian

C)

triassic

D)

Jurassic.

View Answer

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AMU Solved Paper-1999 Total Questions - 200