In the circuit diagram of logic gates shown below, the inputs are shown by A and B. The output X will be given as:
1.
2.
3.
4.
Maximum velocity of photoelectrons emitted by a metal surface is m/s. Assuming the specific charge of the electron to be C/kg, the value of the stopping potential in volt will be:-
1. 2
2. 3
3. 4
4. 6
The ratio of the de-Broglie wavelength of molecules of hydrogen and helium kept in two jars separately at temperatures of 27C and 127C respectively is:-
1.
2.
3.
4.
The activity of a sample of radioactive material is at time and at time . If its mean life is T, then which of the following is true?
1.
2.
3.
4.
The shortest wavelength in Lyman series is 91.2 nm. The largest wavelength of the series is:-
1. 121.6 nm
2. 182.4 nm
3. 243.4 nm
4. 364.8 nm
If nucleus D at rest breaks up into two fragments A and C which fly off with velocities in the ratio 8 : 1, then the ratio of radii of the fragments is:-
1. 1 : 2
2. 1 : 4
3. 4 : 1
4. 2 : 1
In the given transistor circuit, the base current is \(35\) . The value of \(R_b\) is:
( Take \(V_{BE}=0\) )
1.
2.
3.
4.
If resistance of a forward biased pn-junction is 10 and that of reverse biased pn-junction is infinite. The reading of ammeter in the circuit diagram shown below is:
1. 0.05 A
2. 0.1 A
3. 0.2 A
4. 0.5 A
The length of a cylinder is measured with a meter rod having least count 0.1 cm. Its diameter is measured with vernier callipers having least count 0.01 cm. Given that the length is 5.0 cm and diameter is 2.0 cm. The percentage error in the calculated value of the volume will be :-
1. 1 %
2. 2 %
3. 3 %
4. 4 %
The adjoining figure shows the connections of potentiometer experiment to determine internal resistance of a leclanche cell. When the cell is on open circuit the balancing length of the potentiometer wire is 3.4 m and on closing the key K2 the balancing length becomes 1.7 m. If the resistance R of resistance box through which current is drawn is 10 ,then the internal resistance of the cell is :-
1. 0.1
2. 1
3. 10
4. 1.1
In an experiment for the determination of focal length of the convex mirror a convex lens of focal length 20 cm is placed on the optical bench and an object pin is placed at a distance 30 cm from the lens. When convex mirror is introduced in between the lens and the real and inverted image of the object, the final image of the object O is formed at O itself. If the distance between the lens and the mirror is 10 cm, then the focal length of the mirror is :-
1. 10 cm
2. 20 cm
3. 25 cm
4. 50 cm
The dimensional formula for CR, where C is the capacitance and R is the resistance, is :-
1. M0L0T0
2. M0L0T1
3. M1L2T–3
4. M1L1T–2
The linear momentum p of a body of mass 5 kg varies with time t as,
p = 5t2+ t + 5
It follows that the body is moving with :-
1. Constant acceleration.
2. Constant speed.
3. Variable acceleration which is increasing with time.
4. Variable retardation which is decreasing with time.
A block slides down on an inclined surface of inclination with the horizontal. Starting from rest it covers 8 meter in the first two seconds. The coefficient of friction is (g=10 ms-2) :-
1.
2.
3.
4.
A hemispherical bowl of radius R is rotated about its axis of symmetry which is kept vertical with angular velocity . A small block is kept in the bowl. It remains stationary relative to the bowl surface at a position where the radius makes an angle with the vertical. The friction is absent. The value of is :-
1.
2.
3.
4. None of these
A capillary tube is dipped vertically in liquid. If the liquid surface is hemispherical, then the angle of contact is :-
1.
2.
3.
4.
A thermodynamic cycle of an ideal gas is shown in the figure. Choose the correct option which represents the same cycle :-
1.
2.
3.
4.
A string of mass M and length L hangs freely from a fixed point. The velocity of transverse wave along the string at a distance 'x' from the free end will be :-
1.
2.
3.
4.
The magnitudes of the gravitational forces at distances r1 and r2 from the centre of a uniform sphere of radius R and mass M are F1 and F2 respectively. Then:-
1.
2.
3.
4.
The capacitance of a parallel plate capacitor is 5 . When a glass slab of thickness equal to the separation between the plates is introduced between the plates, the potential difference reduces to 1/8 of the original value. The dielectric constant of glass is :-
1. 1.6
2. 40
3. 5
4. 8
A microammeter has a resistance of 100 and a full scale range of 50 A. It can be used as a voltmeter or as a high range ammeter provided a resistance is added to it. Pick the correct range and resistance combination :-
1. 50 V range with 10k resistance in series.
2. 10 V range with 200k resistance in series.
3. 5 mA range with 10 resistance in parallel.
4. 5 mA range with 0.1 resistance in parallel.
In a circuit made up of resistance 4 and inductance 0.01 H, an alternating emf 200 V at 50 Hz is connected, then the phase difference between the current and the emf in the circuit is :-
1.
2.
3.
4.
From a building two balls A and B are thrown such that A is thrown upwards and B downwards (both vertically) with the same velocity. If vA and vB are their respective velocities on reaching the ground then :-
1. VB = VA
2. VB > VA
3. VB < VA
4. Their velocities depend on their masses
A string fixed at both ends vibrates in three loops. The wavelength is 10 cm. The length of string is:
1. 5 cm
2. 15 cm
3. 30 cm
4. None
One end of a uniform wire of length L and of weight W is attached rigidly to a point in the roof and a weight W1 is suspended from its lower end. If A is the area of cross-section of the wire , the stress in the wire at a height 3L/4 from its lower end is:
1.
2.
3.
4.
A spring of force constant k is cut into two pieces such that length of one piece is three times the length of the other. The longer piece will have a force constant of
1.
2.
3.
4.
A double slit of separation 1.5 mm is illuminated by white light (between 4500 -7000 ). On a screen 120 cm away coloured interference pattern is formed. If a pinhole is made on this screen at a distance 3.0 mm from the central white fringe, which of the following wavelength will be absent in the transmitted light?
1. 5000
2. 6000
3. 6500
4. 7000
A thin prism P1 with angle and made from glass of refractive index 1.54 is combined with another prism P2 made from glass of refractive index 1.72 to produce dispersion without deviation. The angle of prism P2 is:-
1. 5.33
2. 4
3. 3
4. 2.6
A pendulum consisting of a small sphere of mass m suspended by an inextensible and massless string of length l is made to swing in a vertical plane. If the breaking strength of the string is 2mg, then the maximum angular amplitude of the displacement from the vertical can be :-
1. 0
2. 30
3. 60
4. 90
A vector of magnitude 'a' is rotated through an angle . What is the magnitude of the change in vector?
1.
2.
3.
4.
An object of mass m is projected with speed u at an angle with horizontal from level ground. The torque on a body about point of projection, when it is at maximum height from ground will be
1.
2.
3.
4.
A body cools in a surrounding which is at a constant temperature of . Assuming that it obeys Newton's law of cooling, its temperature is plotted against time t. Tangents are drawn to the curve at the points A(=1) and B(=2). These tangents meet the time-axis at angles 1 and 2 as shown in the graph then:
1.
2.
3.
4.
A liquid is kept in a cylindrical vessel which is being rotated about a vertical axis through the centre of the circular base. If the radius of the vessel is r and angular velocity of rotation is , then the difference in the heights of the liquid at the centre of the vessel and the edge is :-
1.
2.
3.
4. None of these
The numerical value of the charge on either plate of the capacitor C shown in the figure is :-
1.
2.
3.
4.
A large number of bullets are fired in all directions with the same speed v. The maximum area on the ground on which these bullets will spread is:-
1.
2.
3.
4.
ABCDE is a channel in the vertical plane, part BCDE being circular with radius r. A block is released from A and slides without friction and without rolling. The block will complete the loop if h is :-
1.
2.
3.
4.
Air is streaming past a horizontal airplane wing such that its speed is 120 m/s over the upper surface and 90 m/s at the lower surface. If the density of air is 1.3 kg/m3 and the wing is 10 m long and has an average width of 2m, then the difference of the pressure on the two sides of the wing is:-
1. 40.59 N/m2
2. 409.5 N/m2
3. 4095 N/m2
4. 40950 N/m2
A police van, moving at 22 m/s, chases a motor-cyclist. The police man sounds horn at 176 Hz, while both of them move towards a stationary siren of frequency 165 Hz as shown in the figure.
Police van Motor cycle Stationary siren
If the motor-cyclist does not observe any beats, his speed must be (take the speed of sound = 330 m/s) :-
1. 33 m/s
2. 22 m/s
3. zero
4. 11 m/s
A flute which we treat as a pipe open at both ends is 34 cm along. The fundamental frequency of the flute when all its holes are covered is :- [Take velocity of sound in air = 340 m/s]
1. 100 Hz
2. 250 Hz
3. 500 Hz
4. 280 Hz
540 g of ice at is mixed with 540 g water at . The final temperature of the mixture is :-
1.
2.
3.
4. less than
Six wires each of cross-sectional area A and length l are combined as shown in the figure. The thermal conductivities of copper and iron are K1 and K2 respectively. The equivalent thermal resistance between points A and C is :-
1.
2.
3.
4.
If the nitrogen atoms had electronic configuration 1s7, it would have energy lower than that of the normal ground state configuration 1s2, 2s2, 2p3 because the electrons would be closer to the nucleus. Yet 1s7 is not observed because it violates
1. Heisenberg’s uncertainty principle
2. Hund’s rule
3. Pauli exclusion principle
4. Bohr’s postulate of stationary orbits
The equilibrium constant for the reaction is at 200K. In the presence of a catalyst the equilibrium is attained 10 times faster. Therefore, the equilibrium constant in presence of the catalyst at 200 K is
1.
2.
3.
4. none of these
Which of the following carbocation is least stable?
1.
2.
3.
4.
Amongst the following identify the species with an atom in (+6) oxidation state.
1.
2.
3.
4.
Hypochlorite disproportionate to give
1.
2.
3.
4.
What transition in the hydrogen spectrum would have the same wavelength as the Balmer transition, n = 4 to n = 2 in the He+ spectrum?
1. n = 4 to n = 2
2. n = 3 to n = 2
3. n = 3 to n = 1
4. n = 2 to n = 1
Ethanal reacts with HCN and the addition product so obtained is hydrolysed to form a new compound. This compound shows
1. optical isomerism
2. geometrical isomerism
3. tautomerism
4. metamerism
Among complexes highest stability is shown by
1.
2.
3.
4.
The correct order of increasing bond angle order is
1.
2.
3.
4.
The relative stability order of carbanions is _______.
1.
2.
3.
4.
The correct order in which the O–O bond length increases in the following is
1.
2.
3.
4.
Rate of effusion of LPG (a mixture of n-butane and propane) is 1.25 times that of SO3. Hence, mass fraction of n-butane in LPG is
1. 0.75
2. 0.25
3. 0.50
4. 0.67
In which solution, AgCl has minimum solubility?
1.
2.
3. Pure water
4.
50 ml of HCl (pH=1) is mixed with another 100 ml of HCl (pH=2) then pH of resulting solution will be approximately
1. 1.2
2. 1.4
3. 1.6
4. 1.8
How many moles of are required to reduce one mole of in acidic medium?
1. 3/5
2. 1/5
3. 5/3
4. 5
The incorrect statement among the following regarding reaction of is -
1. (acidic medium)
2.
3. (acidic medium)
4.
The minimum distance between two tetrahedral voids is (a=cell edge length)
1.
2.
3.
4.
When aqueous NaCl solution is electrolysed using inert electrodes then pH of the solution
1. Increases
2. Decreases
3. Remains same
4. First increases then decreases
is 60% ionised. Then the value of Van't Hoff factor is
1. 1.6
2. 2.4
3. 3
4. 3.4
The concentration of reactant X decreases from 0.1 M to 0.005 M in 40 minutes. If the reaction follows first order kinetics, the rate of reaction when concentration of X is 0.01 M
will be
1. 1.73×10–4 M min–1
2. 3.47×10–4 M min–1
3. 3.47×10–5 M min–1
4. 7.50×10–4 M min–1
Which of the following complex will show geometrical as well as optical isomerism?
1.
2.
3.
4.
Crystal field stabilization energy for high spin d4 octahedral complex is
1.
2.
3.
4.
Victor Meyer Test is used for the distinguished of 1°, 2° and 3°
1. Alcohols
2. Alkyl halides
3. Nitro compounds
4. All of these
1.
2.
3.
4.
The slowest step of Cannizarro’s reaction is
1. Attack of nucleophilic
2. Hydride shift
3. Formation of anion
4. Transfer of proton
1.
2.
3.
4.
An organic compound X on treatment with acidified K2Cr2O7 gives compound Y which reacts with I2 and NaOH to form CHI3. The compound X can be
1. CH3OH
2. CH3CHO
3. CH3COCH3
4. CH3CH(OH)CH3
Number of Chiral carbon atoms in –D(+)–glucose is
1. 5
2. 4
3. 3
4. 2
Heat liberated when 200 ml of 1 N Ca(OH)2 is neutralised by 700 ml of 1 N HCl
1. 5.73 kJ
2. 11.46 kJ
3. 57.3 kJ
4. 63.67 kJ
Number of oxygen having -1 and -2 state in CrO5
1. 2, 3
2. 4, 1
3. 3, 2
4. 1, 4
The ratio of equivalent weight of KMnO4 in acidic, neutral and basic medium are
1. 3 : 5 : 15
2. 3 : 5 : 5
3. 5 : 3 : 1
4. 3 : 5 : 1
Most stable carbocation
1.
2.
3.
4.
Degree of unsaturation in C5H5N
1. 3
2. 4
3. 5
4. 2
Which of the pair content cannot be differentiated by iodoform reaction?
1. and ethanol
2.
3. Pentan-3-one and pentanol
4. Both 1. & 2.
Which of the following compound is weakest Lewis acid?
1. BF3
2. BCl3
3. BBr3
4. BI3
The conjugate acid of azide ion is
1.
2.
3.
4.
A petrol pump hosepipe for delivery of petrol is made up of
1. natural rubber
2. vulcanized rubber
3. neoprene
4. butadiene rubber
3A C + D, For this reaction it is observed that when initial concentration of A is 10 moles/lit then t1/2 value of this reaction is 40 min and when initial concentration of A is 20 moles/lit, t1/2 value has been changed into 20 min. Which of the following is true?
1. The reaction is bimolecular reaction
2. This reaction is an example of radioactive disintegration
3. The reaction is of 1st order
4. The order of the reaction is ‘two’
A solution of (+)–2 chloro–2–phenylethane in toluene racemizes slowly in the presence of small amount of SbCl5 due to formation of
1. carbanion
2. carbene
3. free radical
4. carbocation
Two substances A and B are present such that [A0] = 4[B0] and half-life of B is 15 minutes and that of A is 5 minutes. If they start decaying at the same time following first order kinetics how much time later will the concentration of both of them would be same?
1. 15 minutes
2. 10 minutes
3. 5 minutes
4. 12 minutes
Among the following compounds, the strongest acid is
1. HCCH
2. C6H6
3. C2H6
4. CH3OH
Which of the following will give yellow precipitate with ?
1.
2.
3.
4. Both (2) and (3)
Species in which central atom is sp2 hybridised
1. (CH3)3N
2. (SiH3)3N
3. (SiO2)n
4. :NH3
A nitrogeneous substance X is treated with HNO2 and the product so formed is further treated with NaOH solution, which produces blue colouration. X can be
1.
2.
3.
4.
Identify the stages of cell cycle in which the following events occur
(A) Duplication of most of the organelles
(B) Duplication of centrioles
(C) Synthesis of tubulin proteins
(A) (B) (C)
1. G2 phase G1 phase M phase
2. S phase M phase G0 phase
3. M phase Interphase G1 phase
4. G1 phase S phase G2 phase
Read the following and choose the incorrect statement
1. Majority of red algae are marine with greater concentrations found in the warmer areas.
2. Thallus of Marchantia is dorsiventral and closely appressed to the substrate.
3. In Sequoia, reduced male gametophyte is called pollen grain and its endosperm represents future sporophytes.
4. Wolffia is the smallest flowering plant.
Trypsinogen can be activated by:
1. HCl
2. Enterogastrone
3. Trypsin
4. Bicarbonate ions
Consider the characters of a certain digestive enzyme:
I. It is a proteolytic enzyme secreted as zymogen.
II. It acts in an alkaline pH.
III. It activates many pancreatic enzymes.
The digestive enzyme is:
1. Pepsin
2. Enterokinase
3. Cholecystokinin
4. Trypsin
What is the current efficiency of an electrode deposition of Cu metal from CuSO4 solution in which 9.8 gm copper is deposited by the passage of 5 amperes current for 2 hours?
1. 41.4%
2. 50%
3. 75%
4. 82.8%
Consider the following statements and select the option that correctly fill in the blanks
(a) __________ acts as gametes in plasmodial slime moulds.
(b) __________ forms a connecting link with plants, animals and fungi.
(c) __________ are regarded as advanced protists and primitive fungi.
(d) __________ is producer-consumer protist.
How many of the following are incorrectly matched?
(1) Porphyra - Chlorophyll a and b
(2) Dictyota - Fucoxanthin
(3) Ulothrix - Mannitol
(4) Sargassum - Laminarin
1. 1
2. 3
3. 4
4. 2
Identify the organism that shows the following characteristics.
(a) Zygotic meiosis
(b) Causes red tide of the sea
(c) Mesokaryon organisation
(d) Whirling whips
1. Noctiluca
2. Gonyaulax
3. Melosira
4. Navicula
Select the mismatched pair
Fuits Edible parts
1. Cashew nut Cotyledons
2. Mango Fleshy mesocarp
3. Almond Mesocarp
4. Apple Fleshy thalamus
Read the following statements and identify the incorrect ones.
(i) Intrafascicular and interfascicular cambium are the lateral meristems that participate in the secondary growth of dicot stem.
(ii) The heartwood comparises dead elements with highly lignified cell walls.
(iii) Phelloderm has thin walled paranchymatous cells.
(iv) The oldest layer of phloem lies just outside the pericycle.
(v) Phloem paranchyma is absent in most of the monocots.
1. All except (iv)
2. (i), (ii) and (iii)
3. (iv) only
4. (iii) and (v)
Match the following columns
Column-I Column-II
a. Mg2+ (i) Alcohol dehydrogenase
b. Mo (ii) RuBisCO
c. Zn2+ (iii) Catalase
d. Iron (iv) Nitrogenase
1. a(iv), b(ii), c(i), d(iii)
2. a(ii), b(iv), c(i), d(iii)
3. a(ii), b(iv), c(iii), d(i)
4. a(iii), b(i), c(ii), d(iv)
In C4 plants, number of carbon atoms in
(a) Primary CO2 acceptor
(b) Primary CO2 fixation product
(a) (b)
1. 5 3
2. 3 4
3. 3 5
4. 4 3
Leading strand does not require which one of the enzyme during DNA replication?
1. Primase
2. DNA polymerase I
3. DNA polymerase III
4. Ligase
Statement - A : Shuttles do not occur in prokaryotes.
Statement- B : NADH2 molecules produced during glycolysis can directly enter the mitochondria.
1. Only A is correct.
2. Only B is correct.
3. Both A and B are correct.
4. Both A and B are incorrect.
Find the direction of water flow in the given system
1. A C
2. BC
3. C A
4. A B
All the given plants are dioecious, except
1. Papaya
2. Date palm
3. Marchantia
4. Coconut
The pure line round seeded pea plant was crossed with wrinkled seeded pea plant. The F1 generation is ____ and it can be explained by _____. (respectively)
1. Wrinkled : Law of segregation
2. Round : law of dominance
3. Round : Condominance
4. Wrinkled : Law of dominance
“Pusa Swarnim” is a/an
1. Aphid resistant variety of Brassica.
2. White rust resistant variety of Brassica.
3. Shoot and fruit borer resistant variety of flat bean.
4. Hill bunt resistant variety of wheat.
In STP
1. Primary treatment is a biological process.
2. Flocs are anaerobic and autotrophic microbes.
3. BOD measures the organic matter present in the water.
4. Activated sludge is the effluent of tertiary treatment.
“Sexual deceit” is employed by
1. Ophrys to get pollinated.
2. Orchids on mango for shelter.
3. Cuckoo on crow.
4. Abingdon torgoise in Galapagos island.
Humus is
A. Dark coloured amorphous substance.
B. Highly resistant to microbial action.
1. Both A and B are correct.
2. Both A and B are incorrect.
3. A is correct but B is incorrect.
4. A is incorrect but B is correct.
Most important cause for biodiversity loss is
1. Over exploitation.
2. Allien species invasion.
3. Co-extinctions.
4. Habitat loss and fragmentation.
The international treaty to control ozone depletion is
1. Kyoto protocol.
2. Montreal protocol.
3. Bali convention.
4. Earth summit.
Read the following statements and choose the correct pair.
1. Collection of preserved plant and animal specimens – Herbarium.
2. Solanum, Panthera, Triticum, Felis – Genus.
3. Reproduction is synonymous to growth – Albugo.
4. Study of diversity of living organisms along with their evolutionary relationships – Taxonomy.
Fill in the blanks and choose the correct option
1. Mycelium is coenocytic and aseptate in class ___(i)___
2. ___(ii)___ undergoes rapid multiplication and causes red tide.
3. Sleeping sickness is caused by ___(iii)___ protozoan.
4. The protein coat of virus consist of small subunits called ___(iv)___
W.M. Stanley
1. Discovered TMV.
2. Coined the term virus.
3. Demonstrated that extract of infected plant can cause tobacco mosaic disease in healthy plants.
4. Crystallised virus and showed that crystals are largely made up of proteins.
Which of the following is not related to the floral formula of belladonna?
1.
2.
3.
4. K(5)
___(i)___ cambium forms complete, continuous but wavy ring during secondary growth in ___(ii)___
1. (i) Vascular (ii) Dicot stem
2.(i) Cork (ii) Dicot leaf
3. (i) Vascular (ii) Dicot root
4.(i) Cork (ii) Dicot root
Read the following statement with respect to prokaryotic cell
I. Single envelope system present.
II. Mesosome increases surface area for enzyme action.
III. The small circular DNA outside the genomic DNA confers unique phenotype.
IV. Contains pseudovacuoles.
1. Only I is correct.
2. Only I and II are correct.
3. Only I, II and III are correct.
4. I, II, III and IV are correct.
Crossing over
1. Occurs in dyad stage of meiosis.
2. Causes recombination between genes of homologous chromosomes.
3. Occurs after chiasmata formation in leptotene.
4. Occurs in diplotene, the longest phase of meiosis.
Loss of water in liquid phase from the margin of leaves in many herbaceous plants is/occurs
1. Guttation
2. Transpiration
3. At noon
4. Due to cohesion-tension model of water movement.
The essential element which maintains the ribosome structure is
1. Responsible for carbohydrate translocation.
2. Needed during mitotic spindle formation.
3. Constituent of ring structure of chlorophyll.
4. Needed in the synthesis of auxin.
Read the following statements
Statement - I : Water splitting complex is located on the inner side of the thylakoid membrane.
Statement - II : During chemiosmosis breakdown of proton gradient releases energy.
1. Both I and II are incorrect.
2. I is correct but II is incorrect.
3. I is incorrect but II is correct.
4. Both I and II are correct.
Complete the given reaction of the cycle present in the mitochondrial matrix:
1. A—Succinic acid; B—Pyruvate dehydrogenase.
2. A—Malic acid; B—Transacetylase.
3. A—OAA; B—Citrate synthase.
4. A— -KGA; B Thiokinase.
The phytohormone, which was first isolated from human urine, shows
a. Bolting effect.
b. Apical dominance.
c. Control of xylem differentiation.
d. Promote leaf senescence.
e. Ripening of fruit.
f. Initiation of rooting is stem cuttings.
1. b, c and f
2. a, d and e
3. b, e and f
4. a, b and d
The given vegetative propagule is
1. Bulb of onion
2. Rhizome of turmeric
3. Tuber of potato
4. Bulbil of Agave
A man suffering from haemophilia marries a normal woman without any history of haemophilia in her family. What percentage of their sons are affected?
1. 100%
2. 75%
3. 50%
4. 0%
Study the given pedigree chart and choose the correct statement
1. The trait under study is dominant.
2. Both parents are homozygous.
3. The trait can be X-linked recessive disease haemophilia.
4. The trait depicted is autosomal recessive like cystic fibrosis.
In prokaryotes, semi-conservative DNA replication was first proved by using
1. Radioactive 35S and 32P isotope.
2. Heavy 15N isotope.
3. Vicia faba.
4. 3H isotope in thymine.
(i) The VNTR belongs to a class of satellite DNA referred to as __A__.
(ii) Regulation of lac operon by repressor is referred to as __B__regulation.
(iii) The secondary structure of tRNA looks like __C__
A B C
1. Minisatellite Positive L-shaped
2. Micro-satellite Negative Inverted L-shaped
3. Minisatellite Negative Clover-leaf
4. Micro-satellite Positive Clover-leaf
In mung bean, resistance to yellow mosaic virus is induced by
1. Mutation breeding
2.Hybridisation
3. Selection
4. Polyploid breeding
Which of the following factors increases population density more significantly if new habitat is colonized?
1. Natality
2. Mortality
3. Immigration
4. Emigration
The natural reservoir for phosphorus is
1. Ocean
2. Rock
3. Atmosphere
4. Living organisms
“Hotspots of biodiversity”, are/show
1. High degree of endemism.
2. Slow rate of extinction.
3. Less species richness.
4. Only five in India.
Natural aging of lake by biological enrichment of its water is
1. Eutrophication
2. Biomagnification
3. Biofortification
4. Bioprospecting
A circuit coil is in y-z plane with centre at the origin. The coil is carrying a constant current. Assuming direction of magnetic field at x=-25 cm to be positive direction of magnetic field, which of the following graphs shows variation of magnetic field along x-axis :-
1.
2.
3.
4.
The figure shown has two coils of wires placed in close proximity. The current in primary coil P is made to vary with time as shown in the graph, which of the following graphs best represents the variation of the emf induced in the secondary coil S?
1.
2.
3.
4.
A bicycle wheel of radius \(0.4~\text{m}\) has \(20\) spokes. It is rotating at the rate of \(180\) revolution per minute, perpendicular to the horizontal component of earth's magnetic field of \(0.4\times 10^{-4}~\text{T}\). The emf induced between the rim and the centre of the wheel will be:
1. \(6\times 10^{-3}~\text{V}\)
2. \(6\times 10^{-4}~\text{V}\)
3. \(6\times 10^{-5}~\text{V}\)
4. \(6\times 10^{-6}~\text{V}\)
A major disadvantage of external fertilization would be:
1. Lack of synchrony between sexes
2. Vulnerability of offspring to predators
3. Decreased amount of variations in the population
4. Limited number of offspring produced
Fertilization normally occurs in which part of the fallopian tube?
1. Junction of ampulla and isthmus
2. Junction of fimbriae and infundibulum
3. Junction of infundibulum and ampulla
4. Ampulla
Which of the following is not a cause for the rapid increase of Indian population today?
1. A rapid decline in death rate
2. An increase in the number of people in reproducible age
3. An increase in the birth rate
4. A decrease in infant mortality and maternal mortality rates
Change of frequencies of alleles in a population or any deviation from Hardy-Weinberg equilibrium is interpreted as:
1. Organic evolution
2. Genetic drift
3. Saltation
4. Punctuated equilibrium
Malignant tertian malaria is caused by Plasmodium:
1. vivax
2. malariae
3. falciparum
4. ovale
The best breeding method for animals that are below average in productivity in milk production is:
1. Inbreeding
2. Out-crossing
3. Cross-breeding
4. Inter-specific hybridization
ELISA is based on the principle of:
1. Complementary base pairing
2. In vitro synthesis of polypeptides
3. Cooperation between innate and acquired immunity
4. Antigen-antibody interaction
The most efficient reproductive strategy for Oysters is that they:
1. Breed only once in their life time
2. Breed many times during their life time
3. Produce a large number of small sized offspring
4. Produce a small number of large sized offspring
Which of the following is/are under the direct neural regulation of the hypothalamus?
1. Anterior pituitary
2. Posterior pituitary
3. Both 1 and 2
4. Pineal
In cochlea, the auditory receptors are:
1. Organ of Corti
2. Ampulla
3. Macula
4. Hair cells
The type of joint between the carpal bones is:
1. Ball and Socket
2. Hinge
3. Pivot
4. Gliding
The presence of which of the following is/are indicative of diabetes mellitus?
1. Glucosuria and ketonuria
2. Glycosuria and hematuria
3. Hematuria and ketonuria
4. None of these
Atrial systole increases the flow of blood into the ventricles by about:
1. 10 %
2. 30 %
3. 50 %
4. 70 %
The maximum volume of air a person can breathe in after a forced expiration is called as:
1. Inspiratory capacity
2. Functional residual capacity
3. Vital capacity
4. Total lung capacity
Inhibition of succinate dehydrogenase by malonate is an example of:
1. Non-competitive inhibition
2. Competitive inhibition
3. Antagonism
4. Synergism
The first pair of wings of a cockroach arises from the:
1. Prothorax
2. Mesothorax
3. Metathorax
4. Anal styles
Which of the following is an oviparous mammal?
1. Balaenoptera
2. Ornithorhynchus
3. Macropus
4. Delphinus
When the heart suddenly stops beating, the condition is called as:
1. CAD
2. Heart failure
3. Cardiac arrest
4. Heart attack
Consider the following characters:
I. Bilaterally symmetrical, triploblastic and coelomate animals.
II. A mantle cavity in which feather like gills re-present.
III. Mouth contains radula – an organ for feeding.
Such organisms will belong to the phylum:
1. Annelida
2. Echinodermata
3. Mollusca
4. Hemichordata
Which of the following is not a fresh water bony fish?
1. Labeo
2. Catla
3. Clarias
4. Exocoetus
Which of the following connects the cytoplasm of adjoining epithelial cells?
1. Tight junctions
2. Adhering junctions
3. Gap junctions
4. All of these
I. Small organic molecules
II. Difficult to remove without denaturing the enzyme
III. Haem is an example
The above characters are of which of the following co-factors of an enzyme?
1. Metal ions
2. Prosthetic groups
3. Co-enzymes
4. Apoenzymes
Consider the characters of a respiratory control center in humans:
I. It is located in pons
II. It moderates the functions of respiratory rhythm center
III. Its absence results in an increase in depth of respiration
The respiratory control center is:
1. Pneumotaxic center
2. Apneustic center
3. Chemosensitive zone
4. Dorsal group
Consider the following events during a cardiac cycle:
I. Closure of the AV valves
II. Opening of the semilunar valves
These events occur during:
1. Atrial diastole
2. Atrial systole
3. Ventricular diastole
4. Ventricular systole
Consider the following regarding a compound affecting renal physiology:
I. It is secreted when plasma osmolality is increased
II. It makes collecting duct permeable to water
III. It can act as vasoconstrictor at high doses
The compound is:
1. Aldosterone
2. Atrial Natriuretic Factor
3. ADH
4. Angiotensin
Consider the characters of a particular type of joint:
I. | It is a type of synovial joint |
II. | It enables the bone to move in a 360° angle. |
III. | It is exemplified by joint between humerus and pectoral girdle |
What is this type of joint called?
1. Hinge
2. Ball and socket
3. Pivot
4. Saddle
Consider the characteristics of a certain part of the human brain:
I. It contains neurosecretory cells.
II. It is an important part of the limbic system.
III. It is a part of the diencephalons.
This part of the human brain is:
1. Hypothalamus
2. Medulla oblongata
3. Cerebellum
4. Amygdala
Identify the hormone:
I. It favors glycogenesis
II. It favors fat synthesis and deposition
III. It favors protein anabolism
1. Cortisol
2. Insulin
3. Growth hormone
4. Adrenaline
Consider the characters of a type of mode of reproduction:
I. It is a type of asexual reproduction seen in plants
II. New individuals arise without production of seeds or spores.
III. It is usually considered a cloning metho4.
What is this mode of reproduction called?
1. Parthenogenesis
2. Parthenocarpy
3. Vegetative reproduction
4. Fragmentation
Consider the following characters:
I. It is secreted by the secondary oocyte and granulosa cells
II. It plays an important role in fertilization
III. It is important in prevention of polyspermy
We are talking about:
1. Chorion
2. Vitelline membrane
3. Zona pellucida
4. Corona radiata
Consider the characteristics of a method of contraception:
I. It prevents ovulation
II. They are very effective contraceptives
III. They are very popular especially amongst urban women
This method of contraception is:
1. Barrier contraception
2. Oral contraceptive pills
3. Intra uterine devices
4. Safe period method
Consider the following characters regarding an evolutionary agent:
I. It is a random binomial sampling error in the gene pool
II. It is brought about by chance alone
III. It acts on a small population
What is this evolutionary agent?
1. Mutation
2. Recombination
3. Genetic drift
4. Gene flow
A cell:
I. Loses the property of contact inhibition
II. Shows uncontrolled proliferation
III. Invades the neighboring tissues
This cell is probably:
1. Mutated
2. Cancerous
3. Dedifferentiated
4. Apoptotic
Consider the following method of breeding in animals:
I. Matings take place between same breed
II. No common ancestor is present on either side for 4 – 6 generations
III. It is the best method to improve milk production in cattle
This method of breeding is called:
1. Inter-specific hybridization
2. Cross-breeding
3. Inbreeding
4. Out-crossing
Consider the characters of a scientific technique:
I. It amplifies the gene of interest
II. It is a vital part of molecular diagnosis of diseases
III. It relies on thermal cycling
The technique is
1. ELISA
2. Southern Blot
3. PCR
4. PAGE
Consider the following characters of an application of biotechnology:
I. It is seen in all eukaryotes as a mechanism of self defense
II. It involves silencing of an mRNA due to a ds RNA
III. Fire and Mello got a noble prize for discovering this technique
This technique is used in:
1. Gene therapy for some genetic diseases
2. Developing transgenic models for human diseases
3. Developing piggyback vaccines
4. Developing pest resistant plants
GEAC is an Indian Government organization that deals with issues related to:
1. Ozone depletion
2. GM research
3. Loss of biodiversity
4. Use of microbes in dairy products
What is defined as a process in which the fitness of a species (measured in terms of its ‘r’ – the intrinsic rate of increase) is significantly lower in the presence of another species?
1. Natural selection
2. Adaptation
3. Competition
4. Founder effect
Identify the incorrectly matched pair:
1. Cockroach - Unisexual animal
2. Chara - Monoecious plant
3. Marchantia - Dioecious plant
4. Sweet potato - Unisexual flower
The first human – like being or hominid was:
1. Dryopithecus
2. Australopithecus
3. Homo habilis
4. Homo erectus
The practice of mating of animals within the same breed, but having no common ancestors on either side of their pedigree up to 4 – 6 generations, is called:
1. Inbreeding
2. Out crossing
3. Cross breeding
4. Inter-specific hybridization
Which of the following have the ability to replicate within bacterial cells independent of the control of chromosomal DNA?
1. Plastids and plasmids
2. Plasmids and bacteriophages
3. Plastids and mitochondria
4. Plasmids, plastids, bacteriophages and mitochondria
The correct order of the relative contribution of various greenhouse gases to total global warming is:
1. Carbon dioxide > Methane > Nitrous oxide > CFCs
2. Methane > Carbon dioxide > Nitrous oxide > CFCs
3. Methane > Carbon dioxide > CFCs > Nitrous oxide
4. Carbon dioxide > Methane > CFCs > Nitrous oxide
Choose the incorrect statement with respect to pollen grain
1. Exine of the pollen grain has prominent apertures called germ pores where sporopollenin is absent.
2. Inner wall of the pollen grain is called intine.
3. Pollen grains are generally spherical in shape.
4. In 60 percent of angiosperms, pollen is shed at three-called stage.
The microbial biocontrol agent with species-specific narrow spectrum insecticidal application is
1. Trichoderma
2. Glomus
3. Dragonflies
4. Nucleopolyhedrovirus
Choose the correct statements
a. Perisperm is the persistant nucellus in the seeds of black pepper.
b. Single large cotyledon in grass is situated towards lateral side of the embryonal axis.
c. Seeds are the basis of agriculture.
d. Citrus has only one embryo in a seed.
1. Only a
2. Only a & b
3. Only a, b & c
4. a, b, c & d
The magnitude of magnetic moment of the current loop shown in the figure is :-
1.
2.
3. Zero
4. None of these