In ruby laser, the stimulated emission is due to transition from
A
metastable state to any lower state
B
any higher state of lower state
C
metastable state to ground state
D
any higher state to ground state
Question 2Single Answer
A direct current I flows along the length of an infinitely long straight thin walled pipe, then the magnetic field is
A
uniform throughout the pipe not zero
B
zero only along the axis of the pipe
C
zero at any point inside the pipe
D
maximum at the centre and minimum at the edge
Question 3Single Answer
convex lens made of glass has focal length 0.15m in air. If the refractive index of glass is 3/2, and that of water is 4/3 the focal length of lens when immersed in water is
A
0.45 m
B
0.15 m
C
0.30 m
D
0.6 m
Question 4Single Answer
Two sources are said to be coherent if they produce waves
A
having a constant phase difference
B
of equal wavelength
C
of equal speed
D
having same shape of wavefront
Question 5Single Answer
Three resistors 1 Ω, 2 Ω, 3Ω resistor a 3 V battery is connected. The current through 3 Ω resistor is -
A
0.75 A
B
1 A
C
2 A
D
1.5 A
Question 6Single Answer
In a common emitter amplifier the input signal is applied across
A
anywhere
B
emitter-collector
C
collector-base
D
base-emitter
Question 7Single Answer
Adding detergents to water helps in removing dirty greasy stains. This is because
1. It increases greasy stains. This is because
2. It decreases the oil-water surface tension
3. It increases the viscosity of the solution
4. Dirt is held suspended surrounded by detergent molecules
A
2 and 4
B
1 only
C
3 and 4
D
4 only
Question 8Single Answer
Choose the correct statement (a) for a cricket ball that is spinning clockwise through air
S1 : Statemlines of air are symmetric around the ball.
S2 : The velocity of air above the ball relative to it is larger than that below the ball.
S3 : The velocity of air above the ball relative to it is smaller than that below the ball.
S4 : There is a net upward force on the ball.
A
S1,S2 and S4
B
S2 and S4
C
S4 only
D
S3 only
Question 9Single Answer
Ferromagnetic materials used in a transformer must have
A
low permeability and high hysterisis loss
B
high permeability and low hysterisis loss
C
high permeability and high hysterisis loss
D
low permeability and low hysterisis loss
Question 10Single Answer
According to Newton’s corpuscular theory, the speed of light is
A
same in all the medium
B
lesser in rarer medium
C
lesser in denser medium
D
independent of the medium
Question 11Single Answer
For the constructive interference the path difference between the two interfering waves must be equal to
A
(2𝜋 + 1)λ
B
2n𝜋
C
nλ
D
n
Question 12Single Answer
The accurate measurement of emf can be obtained using
A
multimeter
B
voltmeter
C
voltameter
D
potentiometer
Question 13Single Answer
A person, with outstretched arms, is spinning on a rotating stool. He suddenly brings his arms down to his sides. Which the following is true about his kinetic energy K and angular momentum L?
A
Both K and L increase
B
Both K and L remain unchanged
C
K remains constant, L increases
D
K increases but L remains constant
Question 14Single Answer
Which of the following is not a thermodynamic coordinate?
A
Gas constant (R)
B
Pressure (p)
C
Volume (V)
D
Temperature (T)
Question 15Single Answer
An antenna uses electromagnetic waves of frequency 5 MHz . For proper working, the size of the antenna should be
A
300 m
B
3 km
C
15 m
D
15 km
Question 16Single Answer
The amount of energy released when one microgram of matter is annihilated is
A
25 kWh
B
9 x 1010 kWh
C
3 x 1010 kWh
D
0.5 x 105 kWh
Question 17Single Answer
The number of significant figures in the numbers 4.8000 x 104 48000.50 are respectively
A
5 and 6
B
5 and 7
C
2 and 7
D
2 and 6
Question 18Single Answer
β-decay means emission of electron from
A
innermost electron orbit
B
a stable nucleus
C
outermost electron orbit
D
radioactive nucleus
Question 19Single Answer
An electric heater rated 220 V and 550 W is connected to AC mains. The current drawn by it is
A
0.8 A
B
2.5 A
C
0.4 A
D
1.25 A
Question 20Single Answer
A string is wound round the rim of a mounted flywheel of mass 20 kg and radius 20 cm. A steady pull of 25 N is applied on the cord. Neglecting friction and mass of the string, the angular acceleration of the wheel is
A
50 s-2
B
25 s-2
C
12.5 s-2
D
6.25 s-2
Question 21Single Answer
A billiards player hits a stationary ball by an identical ball to pocker the target ball in a corner pocket that is at an angle of 35o with respect to the direction of motion of the first ball. Assuming the collision as elastic and that frictional and rotational motions are not important, the angle made by the target ball with respect to the imcoming ball is
A
35o
B
50o
C
55o
D
60o
Question 22Single Answer
A body of mass 0.05 kg is observed to fall with an acceleration of 9.5 ms-2. The opposing force of air on the body is (g = 9.8 ms-2)
A
0.015 N
B
0.15 N
C
0.030 N
D
zero
Question 23Single Answer
The colloidal solution in which both the dispersed phase and dispersion medium are liquids are called
A
emulsions
B
gels
C
foams
D
liquid crystals
Question 24Single Answer
In fog, photographs of the objects taken with infrared radiations are more clear than those obtained during visible light because
A
I-R radiation has lesser wavelength than visible radiation
B
scattering of I-R light is more the object is less
C
the intensity of I-R light is more the object is less
D
scattering of I–R light is less than visible light
Question 25Single Answer
Three concurrent co-planar forces 1 N, 2 N and 3 N acting along different directions on a body
A
can keep the body in equilibrium if 1 N and 3 N act at right angle
B
can keep the body in equilibrium if 1 N and 2 N act at right angle
C
cannot keep the body in equilibrium
D
can keep the body in equilibrium in 1 N and 3 N act at an acute angle
Question 26Single Answer
Sound waves transfer
A
only energy not momentum
B
energy
C
momentum
D
both (a) and (b)
Question 27Single Answer
G P Thomson experimentally confirmed the existence of matter waves by the phenomena
A
diffraction
B
refraction
C
polarisation
D
scattering
Question 28Single Answer
The resistance of a wire at 300 K is found to be 0.3 Ω. If the temperature coefficient of resistance of wire is 1.5 x 10-3 K-1, the temperature at which the resistance becomes 0.6 Ω is
A
720 K
B
345 K
C
993 K
D
690 K
Question 29Single Answer
Two luminous points sources separated by a certain distance are at 10 km from an observer. If the aperture of his eye is 2.5 x 10-3 m and the wavelength of light used is 500 nm the distance of separation between the point sources just seen to be resolved is
A
12.2 m
B
24.2 m
C
2.44 m
D
1.22 m
Question 30Single Answer
A door 1.6 m wide requires a force of N to be applied at the free end to open or close it. The force that is required at a point 0.4 m distance from the hinges for opening or closing the door is
A
1.2 N
B
3.6 N
C
2.4 N
D
4 N
Question 31Single Answer
Temperature can be expressed as derived quantity in terms of
A
length and mass
B
mass and time
C
length, mass and time
D
None of these
Question 32Single Answer
Electron volt is a unit of
A
potential difference
B
charge
C
energy
D
capacity
Question 33Single Answer
Dimensions of impulse are
A
[MLT –1]
B
[MLT²]
C
[MT–2]
D
[ML–1T–3]
Question 34Single Answer
Potential is measured in
A
joule/coulomb
B
watt/coulomb
C
newton–second
D
None of these
Question 35Single Answer
One Nanometer is equal to
A
10–9m
B
10–6m
C
10–10m
D
10–3m
Question 36Single Answer
Maxwell is the unit of
A
magnetic susceptibility
B
intensity of Magnetisation
C
magnetic Flux
D
magnetic Permeability
Question 37Single Answer
Which of the following is derived physical quantity ?
A
Mass
B
Velocity
C
Length
D
Time
Question 38Single Answer
What are the units of magnetic permeability ?
A
Wb A–1 m–1
B
Wb–1 Am
C
Wb A m–1
D
Wb A–1 m
Question 39Single Answer
The dimensions of pressure gradient are
A
[ML–2 T–2]
B
[ML–2 T–1]
C
[ML–1 T–1]
D
[ML–1 T–2]
Question 40Single Answer
The dimensions of Rydberg's constant are
A
[M0L–1T]
B
[MLT–1]
C
[M0 L–1T0]
D
[ML0 T2]
Question 41Single Answer
'Farad' is the unit of
A
resistance
B
conductance
C
capacitance
D
inductance
Question 42Single Answer
S.I. unit of surface tension is
A
degree/cm
B
N/m
C
N/m²
D
Nm
Question 43Single Answer
Which one of the following pairs does not have the same dimension ?
A
Potential energy and Kinetic energy
B
Density and specific gravity
C
Focal length and height
D
Gravitational force and frictional force
Question 44Single Answer
Which one of the following physical quantity has the same unit as that of pressure ?
A
Angular momentum
B
Stress
C
Strain
D
Work
Question 45Single Answer
The symbol of SI unit of inductance is H. It stands for
A
Holm
B
Halogen
C
Henry
D
Hertz
Question 46Single Answer
Light year is a measure of
A
time
B
distance
C
total amount of light falling on the Earth in a year
D
average intensity of light falling on the Earth in a year
Question 47Single Answer
Which one of the following is not a dimension less quantity ?
A
Strain
B
Relative density
C
Frequency
D
Angle
Question 48Single Answer
The dimensions of universal gas constant are
A
[L² M¹ T–2 K–1]
B
[L¹ M² T–2 K–1]
C
[L¹ M¹ T–2 K–1]
D
[L² M² T–2 K–1]
Question 49Single Answer
The dimensions of magnetic moment are
A
[L²A¹]
B
[L²A–1]
C
[L²/A³]
D
[LA²]
Question 50Single Answer
The dimensions of Wien's constant are
A
[ML0TK]
B
[M0LT0K]
C
[M0L0TK]
D
[MLTK]
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Physics
Question 51Single Answer
The dimensional formula of wave number is
A
[M0L0T–1]
B
[M0L–1T0]
C
[M–1 L–1 T0]
D
[M0 L0 T0]
Question 52Single Answer
The dimensional of Hubble ‘s wave number is
A
[T–1]
B
[M0L0T–2]
C
[MLT4]
D
[MT–1]
Question 53Single Answer
The dimensions of solar constant is
A
[M0L0T0]
B
[MLT–2]
C
[ML²T–2]
D
MT–3
Question 54Single Answer
The dimensional formula for entropy is
A
[MLT–2K¹]
B
[ML2 T-2]
C
[ML²T–2K–1]
D
[ML²T–2K]
Question 55Single Answer
Dimension of specific heat are
A
[ML² T–2 K]
B
[ML² T–2 K–1]
C
[ML²T²K–1]
D
[L²T–2K–2]
Question 56Single Answer
The physical quantity which has the dimensional formula [M¹T–3] is
A
surface tension
B
solar constant
C
density
D
compressibility
Question 57Single Answer
Which one of the following elements is used as a timekeeper in atomic clocks ?
A
Potassium
B
Caesium
C
Calcium
D
Magnesium
Question 58Single Answer
Which one of the following is the value of one nanometer ?
A
10–7 cm
B
10–6 cm
C
10–4 cm
D
10–3 cm
Question 59Single Answer
What is the unit of pressure ?
A
Newton/sq. meter
B
Newton–meter
C
Newton
D
Newton/meter
Question 60Single Answer
The unit of pressure is
A
kg/cm²
B
kg/cm
C
kg/mm
D
kg/cm3
Chemistry
Question 61Single Answer
10-6 M NaOH is diluted 100 times. The pH of the diluted base is
A
between 7 and 8
B
between 5 and 6
C
between 6 and 7
D
between 10 and 11
Question 62Single Answer
In the electrolysis of acidulated water, it is desired to obtain 1.12 cc of hydrogen per second under STP condition. The current to be passed is
A
1.93 A
B
9.65 A
C
19.3 A
D
0.965 A
Question 63Single Answer
The one which decreases with dilution is
A
molar conductance
B
conductance
C
specific conductance
D
equivalent conductance
Question 64Single Answer
Vapour pressure of pure ‘A’ is 70 mm of Hg at 25oC. It forms an ideal solution with ‘B’ in which mole fraction of A is 0.8. if the vapour pressure of the solution is 84 mm of Hg at 25oC, the vapour pressure of pure ‘B’ at 25oC is
A
28 mm
B
56 mm
C
70 mm
D
140 mm
Question 65Single Answer
A 6% solution of urea is isotonic with
A
1 M solution of glucose
B
0.05 M solution of glucose
C
6% solution of glucose
D
25% solution of glucose
Question 66Single Answer
In countries nearer to polar region, the roads are sprinkled with CaCl2. This is
A
to minimise the wear and tear of the roads
B
to minimise the snow fall
C
to minimise pollution
D
to minimise the accumulation of dust on the road
Question 67Single Answer
A compound of ‘A’ and ‘B’ crystallises in a cubic lattice in which ‘A’ atoms occupy the lattice points at the corners of the cube. The ‘B’ atoms occupy the centre of each face of the cube. The probable empirical formula of the compound is
A
AB2
B
A2B
C
AB
D
AB3
Question 68Single Answer
In electrophilic aromatic substitution reaction, the nitro group is meta directing because it
A
decreases electron density at ortho and para positions
B
decreases electron density at meta position
C
increases electron density at meta position
D
increases electron density at ortho and para position
Question 69Single Answer
The best method for the conversion of an alcohol into an alkyl chloride is by treating the alcohol with
A
PCI5
B
PCI3
C
SOCl2 in presence of pyridine
D
dry HCl in the presence of anhydrous ZnCl2
Question 70Single Answer
The carbon bond length in benzene is
A
in between C2H6 and C2H4
B
same as in C2H4
C
in between C2H6 and C2H2
D
in between C2H4 and C2H2
Question 71Single Answer
The compound which is not formed during the dry distillation of a mixture of calcium formate and calcium acetate is
A
methanal
B
propanal
C
propanone
D
ethanal
Question 72Single Answer
An organic compound x is oxidised by using acidified K2Cr2O7. The product obtained reacts with phenyl hydrazine but does not answer silver mirror test. The possible structured of X is
A
CH3CH2OH
B
CH3 – C – CH3
C
(CH3)2CHOH
D
CH3CHO
Question 73Single Answer
Arrange the following in the increasing of their. Basic strengths CH3NH2, (CH3)2NH, (CH3)2N, NH3
A
NH3, < (CH3)3N < (CH3)2NH < CH3NH2
B
NH3 < (CH3)3N < CH3NH2 < (CH3)2NH
C
(CH3)3N < NH3 < CH3NH2 < (CH3)2NH
D
CH3NH2 < (CH3)2NH < (CH3)3N , NH3
Question 74Single Answer
The one which has least iodine value is
A
sunflower oil
B
ginger oil
C
ghee
D
groundnut oil
Question 75Single Answer
A diabetic person carries a packet of glucose with him always, because
A
glucose reduces the blood sugar level slowly
B
glucose increases the blood sugar level slowly
C
glucose reduces the blood sugar level
D
glucose increases the blood sugar level almost instantaneously
Question 76Single Answer
There are 20 naturally occurring among acids. The maximum number of tripeptides than can be obtained is
A
8000
B
6470
C
7465
D
5360
Question 77Single Answer
At what temperature ill the RMS velocity of SO2 be the same as that of O2 at 303 K ?
A
403 K
B
303 K
C
606 K
D
273 K
Question 78Single Answer
Phenol is treated with bromine water and shaken well. The white precipitate formed during the process is
A
m–bromophenol
B
2, 4, 6 tribromophenol
C
2-4 dibromophenol
D
A mixture of o-and p-bromophenols
Question 79Single Answer
In thermite process the metal used as reducing agent is:
A
Nickel
B
Zinc
C
Sodium
D
Aluminium
Question 80Single Answer
Which of the following compounds on boiling with alkaline KMnO4 and subsequent acidification will not give benzoic acid?
A
Benzyl alcohol
B
Acetophenone
C
Anisole
D
Toluene
Question 81Single Answer
The base present in DNA, but not in RNA is:
A
Guanine
B
Adenine
C
Uracil
D
Thymine
Question 82Single Answer
The total number of lattice arrangements in different crystal system is:
A
7
B
3
C
8
D
14
Question 83Single Answer
Alcoholic potash is used to bring about :
A
Dehydrogenation
B
Dehydration
C
Dehydrohalogenation
D
Dehalogenation
Question 84Single Answer
Which of the following is the correct statement?
A
Order of a reaction has always an integral value
B
Mechanism of a reaction proposed is always final
C
Zero order reactions are multi-step reactions
D
Order of reaction can be predicted even without knowing the rate law
Question 85Single Answer
The unit of quantity of electricity is:
A
Ohm
B
Ampere
C
Coulomb
D
Volt
Question 86Single Answer
Which of the following organic compounds answers both iodoform test and fehling’s test ?
A
Methanal
B
Ethanol
C
Propane
D
Ethanal
Question 87Single Answer
10 dm3 of N2 gas and 10 dm3 of gas X at the same temperature and pressure contain the same number of molecules.
A
NO
B
H2
C
CO2 or CO
D
All of these
Question 88Single Answer
When the electrons of hydrogen atoms return to L shell from shells of higher energy, we get a series of lines in the spectrum. This series is called
A
Balmer series
B
Lyman series
C
Bracket series
D
Paschen series
Question 89Single Answer
The alcohol obtained by the hydrolysis of oils and fats is:
A
Glycol
B
Glycerol
C
Propanol
D
Pentanol
Question 90Single Answer
Which of the following alloys is used for making magnets for hearing aids?
A
Alnico
B
German silver
C
Invar
D
Monel metal
Question 91Single Answer
Which of the following is not a synthetic fibre:
A
Anygora
B
Rayon
C
Nylon
D
Polyster
Question 92Single Answer
Which one of the following is not contained in Portland cement ?
A
Ca3Al2O6
B
Ca3SiO5
C
Ca2SiO4
D
Ca3(PO4)2
Question 93Single Answer
What is the reson for white cement to be white ?
A
It does not contain carbon
B
It does not contain silicon
C
It does not contain iron
D
It does not contain calcium
Question 94Single Answer
Which fertilizer is assimilated directly by the plant ?
A
Super phosphate
B
Nitrolim
C
Muriate of Potash
D
Humus
Question 95Single Answer
Which of the following chemicals is used in foam fire extinguishers ?
A
Aluminium sulphate
B
Copper sulphate
C
Cobalt sulphate
D
Nickel sulphate
Question 96Single Answer
What is a mixture of potassium nitrate, powdered charcoal and sulphur called ?
A
Glass
B
Cement
C
paint
D
Gun powder
Question 97Single Answer
Which one of the following chemicals is used in beauty parlours for hair – setting ?
A
Sulphur based
B
Phosphorus based
C
Silicon based
D
Iron based
Question 98Single Answer
Which one of the following is used as a mordant in dyeing and tanning industry ?
A
Magnesium oxide
B
Magnesium carbonate
C
Magnesium chloride
D
Magnesium sulphate
Question 99Single Answer
Which one of the following substances is used in the manufacture of safety matches ?
A
Red phosphorus
B
White phosphorus
C
Phosphorus trioxide (P2O3)
D
Black phosphorus
Question 100Single Answer
Which one of the following polymeric materials is used for making bullet proof jacket ?
A
Nylon –6, 6
B
Rayon
C
Kevlar
D
Dacron
Question 101Single Answer
Which one of the following is another name of RDX
A
Cyanohydrin
B
Dextran
C
Cyclohexane
D
Cyclonite
Question 102Single Answer
Which one of the following is used as an explosive ?
A
Phosphorus trichloride
B
Mercuric oxide
C
Graphite
D
Nitroglycerine
Question 103Single Answer
Flint glass is obtained from which of the following ?
A
Zinc and barium borosilicate
B
Sand, red lead and potassium carbonate
C
Sodium aluminium borosilicate
D
Pure silica and zinc oxide
Question 104Single Answer
Which one of the following correctly defines the state of glass ?
A
Crystalline solid
B
Super cooled liquid
C
Condensed gas
D
Liquid crystal
Question 105Single Answer
Which one of the following is not used as fertilizer ?
A
Ammonium nitrate
B
Ammonium sulphide
C
Ammonium phosphate
D
Ammonium sulphate
Question 106Single Answer
Which one of the following elements is needed in the human body to transfer electrical signals by nerve cells ?
A
Lithium
B
Sodium
C
Rubidium
D
Caesium
Question 107Single Answer
Which one of the following is NOT true for bleaching powder ?
A
It is used as a reducing agent in chemical industries
B
It is used for bleaching wood pup in paper factories
C
It is used for disinfecting drinking water
D
It is used for bleaching linen in textile industry
Question 108Single Answer
Hard glass having the same ingredientsas soft glass excepts.
A
hard glass have Na in place of K
B
hard glass having K in place of Na
C
hard glass having both Na and K
D
None of the above
Question 109Single Answer
A complete fertilizer provides
A
N,P, K
B
S, K, N
C
S, B, K
D
N, S, P
Question 110Single Answer
Antacids are commonly used to get rid of acidity in the Stomach. A commonly used antacid is.
A
sodium hydrogen phthalate
B
magnesium hydroxide
C
calcium hydroxide
D
manganese acetate
Question 111Single Answer
Annealing of glass is done to.
A
make it brittle
B
make it opaque
C
make it transparent
D
None of the above
Question 112Single Answer
Petrochemicals are obtained from.
A
coal
B
petroleum
C
coal tar
D
All of these
Question 113Single Answer
The use of chemicals for treatment of diseases is called as.
A
isothermotherapy
B
angiotherapy
C
physiotherapy
D
chemotherapy
Question 114Single Answer
Which of the following is a hypnotic drug ?
A
luminal
B
salol
C
catechol
D
chemisol
Question 115Single Answer
Teflon is a polymer of which of the following monomers ?
A
Tetrafluoroethylene
B
Vinyl chloride
C
Acetylene dichloride
D
None of the above/More than one of the above
Question 116Single Answer
LPG used as domestic fuel chiefly contains–
A
Methane
B
Propane
C
Ethylene
D
Butane
E
None of the above/More than one of the above
Question 117Single Answer
Glass is a.
A
liquid
B
colloid
C
non–crystalline amorphous solid
D
crystalline solid
Question 118Single Answer
Which one of the following acids is used for etching glass ?
A
H2SO4
B
HNO3
C
HF
D
HCI
Question 119Single Answer
What is the purpose of adding plasticizers in paint manufacturing process ?
A
They act as a film–forming constituent
B
They reduce the viscosity
C
They prevent the polymerization and condensation
D
They provide elasticity to the film and minimize its cracking
Question 120Single Answer
Which raw material is used in the preperation of soft glass ?
A
K2CO3, SiO2, CaCO3
B
K2CO3, SiO2, PbCO3
C
Na2CO3, SiO2, CaCO3
D
Na2CO3, SiO2, PbO
Biology
Question 121Single Answer
The respiratory quotient during cellular respiration would depend on
A
the nature of enzymes involved
B
the nature of the substrate
C
the amount of carbon dioxide released
D
the amount of oxygen utilised
Question 122Single Answer
Which of the following is not a green - house gas ?
A
Water vapour
B
Carbon monoxide
C
Methane
D
Oxygen
Question 123Single Answer
Both husband and wife have normal vision though their fathers were colorblind and mothers did not have any gene for colorblindness. The probability of their daughters becoming colorblind is
A
50%
B
75%
C
0%
D
25%
Question 124Single Answer
An animal, which has both exoskeleton and endoskeleton structures is a
A
fresh-water mussel
B
tortoise
C
frog
D
jelly fish
Question 125Single Answer
Identify the group, which includes animals all of which give birth to young ones directly?
A
Dolphin, kangaroo, bat, cat
B
Platypus, penguin, bat, hippopotamus
C
shrew, bat, kiwi, car
D
Lion, whale, ostrich, bat
Question 126Single Answer
Compare the statement A and B. Statement A Blood sugar level falls rapidly after hepatectomy. Statement B The glycogen of the liver is the principal source of blood sugar.
Select the correct description.
A
Both the statements A and B are correct and B is the reason for A
B
Statement A is correct and B is wrong
C
Statement A is wrong and B is correct
D
Both the statements A and B are correct and B is not the reason for A
Question 127Single Answer
What is/are true about heart wood?
(A) It does not help in water conduction.
(B) It is also called laburnum.
(C) It is dark in colour but very soft.
(D) It has tracheary elements which are filled with tannin, resin, etc.
A
B,C and D
B
A and D
C
B and D
D
A, B and C
Question 128Single Answer
Compare the statements A and B. Statement A Auxins promote apical dominance by suppressing the activity of lateral buds. Statement B In moriculature, periodic pruning of shoot tips is done to make mulberry plants bushy.
Select the correct description.
A
Both the statements A and B are correct and A is the reason for B
B
Statement A is correct and B is wrong
C
Statement A is wrong and B is correct
D
Both the statements A and B are correct and A is not the reason for B
Question 129Single Answer
Bryophytes resemble algae is the following aspects
A
Filamentous body, presence of vascular tissues and autotrophic nutrition
B
Differentiation of plant body into root, stem and leaves and autotrophic nutrition
C
Thallus like plant body, presence of roots and autotrophic nutrition
D
Thallus like plant body, lack of vascular tissues and autotrophic nutrition
Question 130Single Answer
Stoma opens, when
A
guard cells swell due to an increase in their water potential
B
guard cells swell by endosmosis duie to influx of hydrogen ions (protons)
C
guard cells swell by endosmosis due to efflux of potassium ions
D
guard cell swell due to a decrease in their water potential
Question 131Single Answer
Which of the following is properly matched ?
A
Platyhelminthes –Trematoda – Planoria
B
Echinodermate – Asteroidea – Star fish
C
arthropoda – Insecta – Spider
D
Mollusca – Cephalopoda – Unio
Question 132Single Answer
A man is admitted to a hospital. He is suffering from an abnormally low body temperature, loss of appetite and extreme thirst. His brain scan would probably show a tumour in
A
medulla oblongata
B
pons
C
cerebellum
D
hypothalamus
Question 133Single Answer
The agents, which are known to cause CJD are
A
protein particles
B
a class of bacteria
C
a class of viruses
D
fungi
Question 134Single Answer
In crop improvement programmers, virus-free clones can be obtained through
A
grafting
B
hybridization
C
embryo culture
D
shoot apex culture
Question 135Single Answer
A person is suffering from frequent episodes of nasal discharge, nasal congestion, reddening of eyes and watery eyes. These are the symptoms of
A
cyanosis
B
bronchitis
C
rhinitis
D
bronchial carcinoma
Question 136Single Answer
Some important events in the human female reproductive cycle are given below. Arrange the events in a proper sequence.
A: Secretion of FSH
B: Growth of corpus luteum
C: Growth of the follicle and oogenesis
D: Ovulation
E: Sudden increase in the levels of LH
A
C → A → D → B → E
B
A → C → E → D → B
C
A → D → C → E → B
D
B → A → C → D → E
Question 137Single Answer
Which of the following options shows bisexual animals only ?
A
Amoeba, sponge, leech
B
Sponge, cockroach, Amoeba
C
Earthworm, sponge, leech
D
Tapeworm, earthworm, honeybee
Question 138Single Answer
Vaccination against small pox was developed by:
A
Louis Pasteur
B
Edward jenner
C
Robert Koch
D
Alexander Flemming
Question 139Single Answer
The value of human diastolic blood pressure is :
A
120 – 80 = 40 mm. Hg
B
120 mm. Hg
C
80 mm. Hg
D
128/80 mm. Hg
Question 140Single Answer
Balance theory of sex determination holds good for:
A
Allium cepa
B
Drosophila
C
Humans
D
grasshoppers
Question 141Single Answer
Which of the following contain enzymes for cellular respiration ?
A
Dictyosomes
B
Endoplasmic reticulum
C
lysosomes
D
Mitochondria
Question 142Single Answer
Which one among the following nutrients is a strctural
A
Cell membrane
B
Plasma membrane
C
Cell wall
D
Nucleus
Question 143Single Answer
Which one among the following nutrients is a structural component of the cell wall of plants ?
A
Manganese
B
Potassium
C
Phosphorus
D
Calcium
Question 144Single Answer
Which of the following groups is present in animal cells ?
A
Mitochondria, Cell membrane, Cell wall, Cytoplasm
B
Chloroplasts, Cytoplasm, Vacuole, Nucleus
C
Nucleus, Cell membrane, Mitochondria, Cytoplasm
D
Vacuole, cell membrane, Nucleus, Mitochondria
Question 145Single Answer
For which among the following is not a true fruit ?
A
Apple
B
Date
C
Grape
D
Plum
Question 146Single Answer
Which one of the following is not a constituent of cell membrane ?
A
Cholesterol
B
Glycoplids
C
Proline
D
Phospholipids
Question 147Single Answer
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
G1–phase
C
G2–phase
D
M-phase
Question 148Single Answer
During which stage of mitosis does cytokinesis usually occur in animals ?
A
Phophase
B
Metaphase
C
Anaphase
D
Telophase
Question 149Single Answer
Lysosome arises from
A
endoplasmic reticulum
B
golgi apparatus
C
nucleus
D
mitochondria
Question 150Single Answer
The correct sequence of cell cycle is
A
S, G1, G2, M
B
S, M, G1, G2
C
G1, S, G2, M
D
M, G1, G2, S
Question 151Single Answer
Biological membranes are composed of
A
40% proteins and 60% lipids
B
50% proteins and 50% lipids
C
70% proteins and 30% lipids
D
60% proteins and 40% lipids
Question 152Single Answer
F1 particles / oxysome / elementary particles are present in
A
endoplasmic reticulum
B
chloroplast
C
mitochondria
D
golgi complex
Question 153Single Answer
"Endomitosis" refers to
A
division of nucleus without chromosomal division
B
division of chromosome without nuclear division
C
division of cytoplasm
D
None of the above
Question 154Single Answer
When the concentration of water and solutes on either side of the cell membrane is same, the solution is said to be
A
hypertonic
B
isotonic
C
hypotonic
D
None of these
Question 155Single Answer
The function of nucleous is the synthesis of
A
DNA
B
m - RNA
C
r- RNA
D
t - RNA
Question 156Single Answer
Mesosome in a bacterial cell is
A
plasmid
B
connection between two cells
C
plasma membrane infolded for respiration
D
None of these
Question 157Single Answer
In living cels synthesis of ribonoucleic acid (RNA) takes place in :
A
Cytoplasm
B
Nucleus
C
Golgi body
D
Nephron
Question 158Single Answer
The cell organelle storing substances like starch, oil and proteins is
A
Vacuole
B
Lysosome
C
Plastid
D
Golgi body
Question 159Single Answer
Organisms lacking nuclear membrane and cell organelles is called as :
A
Prokaryotes
B
Eukaryotes
C
Protozoa
D
Virus
Question 160Single Answer
Cell organelles that are involved in the waste disposal system of the cell are :
A
Golgi apparatus
B
Lysosomes
C
Chromosomes
D
Ribosomes
Question 161Single Answer
Plant viruses usually contain :
A
RNA
B
DNA
C
DNA and RNA
D
DNA or RNA
Question 162Single Answer
Viruses were discovered by :
A
Stanley
B
Ivanowski
C
Twort
D
Herelle
Question 163Single Answer
Which statement best defines viruses?
A
Acellular infectious agents that replicate only inside living host cells
B
Cellular microorganisms containing only DNA
C
Free-living microorganisms capable of independent metabolism
D
Cellular microorganisms containing only RNA
Question 164Single Answer
Which infectious agents consist essentially of small, naked RNA molecules without a protein coat?
A
Virions
B
Prions
C
Viroids
D
Bacteriophages
Question 165Single Answer
Coliphage f X 174 contains :
A
double stranded RNA
B
single stranded DNA
C
double stranded DNA
D
single stranded RNA
Question 166Single Answer
Viruses differ from living organisms in that, they :
A
can grow inside a living host
B
can multiply inside a living host
C
can undergo mutation inside a living host
D
are non-cellular
Question 167Single Answer
Virus which attacks E.coli is called :
A
bacteriophage
B
coliphage
C
phytophage
D
zoophage
Question 168Single Answer
Which characteristic distinguishes viruses from cellular organisms?
A
They possess ribosomes for protein synthesis
B
They have independent energy metabolism
C
They are acellular and depend on host cells for replication
D
They reproduce by binary fission
Question 169Single Answer
The genome of a temperate bacteriophage integrated into the bacterial chromosome is termed as?
A
Prophage
B
Episome
C
Plasmid
D
Capsomere
Question 170Single Answer
Virus was crystallized and isolated first by :
A
J.D. Ivanowski
B
F.C. Bawden
C
W.M. Stanley
D
K.M. Smith
Question 171Single Answer
Little leaf disease of brinjal is primarily associated with which pathogen?
A
Phytoplasma
B
Begomovirus
C
Fungus
D
Viroid
Question 172Single Answer
Which approximate size range includes many of the smallest known conventional virus particles?
A
20–30 nm
B
100–150 nm
C
500–700 nm
D
1–2 µm
Question 173Single Answer
Which of the following is devoid of protein coat, with a constitution of RNA only ?
A
Tobacco mosaic virus
B
Poxvirus
C
Potato spindle tuber virus
D
None of the above
Question 174Single Answer
Genetic modification brought about by a virus in a bacteria is known as :
A
transformation
B
transduction
C
conjugation
D
candidiasis
Question 175Single Answer
Which property makes the classification of viruses as strictly living or non-living problematic?
A
They reproduce independently outside cells
B
They possess cellular organelles but lack DNA
C
They replicate in host cells but are metabolically inactive outside them
D
They perform independent respiration outside host cells
Question 176Single Answer
Influenza viruses contain which type of genetic material?
A
Double-stranded DNA
B
Single-stranded RNA
C
Single-stranded DNA
D
Double-stranded RNA
Question 177Single Answer
Edward Jenner is best known for pioneering vaccination against which disease?
A
Smallpox
B
Chickenpox
C
Rabies
D
Poliomyelitis
Question 178Single Answer
Roux Sarcoma virus contains :
A
RNA
B
DNA
C
DNA and RNA
D
None of these
Question 179Single Answer
Which of the following is a viral disease of potato ?
A
Early blight of potato
B
Late blight of potato
C
Leaf roll of potato
D
None of the above
Question 180Single Answer
The term Virus' has been derived from a Latin word meaning :
A
poison
B
secretion
C
cell
D
venom
Question 181Single Answer
What generally happens to contractile-vacuole activity when a freshwater Amoeba is transferred to a sufficiently hypertonic saline solution?
A
It increases rapidly
B
It remains unchanged
C
It decreases markedly or may cease
D
The vacuole divides repeatedly
Question 182Single Answer
What is the median adhesive pad located between the two terminal claws of a cockroach leg called?
A
Unguis
B
Arolium
C
Tibial spur
D
Cercus
Question 183Single Answer
The binomial system of Carolus Linnaeus was devoid of which of the following categories ?
A
Genus and species
B
Class and order
C
Phylum and family
D
Kingdom and class
Question 184Single Answer
The mouthparts of a cockroach are adapted primarily for which mode of feeding?
A
Biting and chewing
B
Piercing and sucking
C
Siphoning
D
Sponging
Question 185Single Answer
Which mosquito is the biological vector responsible for natural transmission of human malaria?
A
Male Culex
B
Female Culex
C
Female Aedes
D
Female Anopheles
Question 186Single Answer
Amniota group includes :
A
Aves and Reptiles
B
Pisces, Amphibia and Reptiles
C
Amphibia, Reptiles and Aves
D
Reptiles, Aves and Mammalia
Question 187Single Answer
Which combination correctly represents the principal mouthparts of a cockroach?
A
Labrum, mandibles, first maxillae, labium and hypopharynx
B
Labrum, antennae, tibia, labium and cerci
C
Mandibles, antennae, femur, maxillae and labium
D
Labrum, wings, mandibles, hypopharynx and tibia
Question 188Single Answer
In a typical winged insect, the two pairs of wings are borne on which thoracic segments?
A
Prothorax and mesothorax
B
Mesothorax and metathorax
C
Prothorax and metathorax
D
Prothorax and first abdominal segment
Question 189Single Answer
Which is true ?
A
Pisces, Reptiles and birds are poikilotherms
B
Pisces, Amphibians and Reptiles are Anamniota
C
Aves, Mammals and Reptiles are homeotherms
D
Reptiles, Aves and Mammais are Amniota
Question 190Single Answer
Which sequence correctly represents the general forward flow of haemolymph through the dorsal vessel of a cockroach?
