AIIMS Full Mock Test - 6


200 Questions MCQ Test AIIMS Mock Tests & Previous Year Papers | AIIMS Full Mock Test - 6


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This mock test of AIIMS Full Mock Test - 6 for NEET helps you for every NEET entrance exam. This contains 200 Multiple Choice Questions for NEET AIIMS Full Mock Test - 6 (mcq) to study with solutions a complete question bank. The solved questions answers in this AIIMS Full Mock Test - 6 quiz give you a good mix of easy questions and tough questions. NEET students definitely take this AIIMS Full Mock Test - 6 exercise for a better result in the exam. You can find other AIIMS Full Mock Test - 6 extra questions, long questions & short questions for NEET on EduRev as well by searching above.
QUESTION: 1

A loss free transformer has 500 turns on its primary winding and 2500 in secondary. The meters of the secondary indicate 200 volts at 8 amperes under these conditions. The voltage and current in the primary is

Solution:
QUESTION: 2

The penetrating power of X - rays increases with the

Solution:
QUESTION: 3

Increasing the charge on the plates of a capacitor means

Solution:
QUESTION: 4

Two non-ideal batteries are connected in parallel. Consider the following statements:
(i) The equivalent emf is smaller than either of the two emfs
(ii) The equivalent internal resistance is smaller than either of the two internal resistances

Solution:
QUESTION: 5

If particles are moving with same velocity, then maximum de-Broglie wavelength will be for

Solution:
QUESTION: 6

A gun fires a bullet of mass 50 gm with a velocity of 30 m sec⁻1 Because of this gun is pushed back with a velocity of 1 m sec⁻1. The mass of the gun is

Solution:
QUESTION: 7

An electron having charge e and mass m is moving in a uniform electric field E. Its acceleration will be

Solution:

Acceleration of the electron (a) 

QUESTION: 8

Particle nature and wave nature of electromagnetic waves and electrons be shown by

Solution:
QUESTION: 9

If a radiation of energy E falls normally on a perfectly reflecting surface, then the momentum transferred to the surface is

Solution:
QUESTION: 10

The primary and secondary coils of a transformer have 50 and 1500 turns respectively. If the magnetic flux φ linked with the primary coil is given by φ = φ0 + 4t, where φ is in weber, t is time in second and φ0 is a constant, the output voltage across the secondary coil is

Solution:

No. of turns across primary Np = 50
Number of turns across secondary Ns = 1500
Magnetic flux linked with primary, Φ = Φ0 + 4t
∴ Voltage across the primary,

QUESTION: 11

In a pure inductive circuit with a.c. source, the current lags behind e.m.f. by

Solution:
QUESTION: 12

In a car spark coil, an e.m.f. of 40000 V is induced in a secondary when the primary current changes from 4 A to zero in 10μs. Find the mutual inductance between the primary and secondary windings of the spark coil

Solution:
QUESTION: 13

In an oscillating LC circuit the maximum charge on the capacitor is Q. The charge on the capacitor when the energy is stored equally between the electric and magnetic fields is

Solution:

QUESTION: 14

An electromagnetic wave of frequency 3 MHz passes from vacuum into a medium with dielectric constant k = 4. Then

Solution:
QUESTION: 15

If 1000 droplets each of charge q and radius r are mixed to form a big drop, then the potential of big drop, as compared to small droplet will be

Solution:

If the value of potential on each small drop be V and potential on each small drop be V '
V ' = n 2/3 V

QUESTION: 16

A capacitor of capacitance 1 μF is charged to 1KV. The energy stored in the capacitor in joules is

Solution:

C = 1μF
V = 1KV
energy stored U = 1/2 (CV2)
= 1/2 x 1 x 12 = 0.5

QUESTION: 17

If the unit of force and length be each increased by four times, then the unit of energy is increased by

Solution:
QUESTION: 18

Two bodies of different masses m₁ and m₂ have equal momenta. Their kinetic energies E₁ and E₂ are in the ratio

Solution:
QUESTION: 19

A solid copper cube of edges 1 cm is suspended in an evacuated enclosure. Its temperature is found to fall from 100ºC to 99ºC in 100 s. Another solid copper cube of edges 2 cm, with similar surface nature, is suspended in a similar manner. The time required for this cube to cool from 100ºC to 99ºC will be approximately

Solution:
QUESTION: 20

An electric iron which when hot has a resistance of 80Ω, is used on a 200 V source. Calculate the electric energy spent in kilowatt-hour if it is used for 2 hours.

Solution:
QUESTION: 21

When 2 ampere current is passed through a tangent galvanometer, it gives a deflection of 30º. For 60º deflection, the current must be

Solution:

QUESTION: 22

An elastic material with Young's modulus 'Y' is subjected to a tensile stress 'σ'. The elastic potential energy stored per unit volume of the material is

Solution:
QUESTION: 23

A force of 100N acts on a body of mass 2kg for 10s. The change in momentum of the body is

Solution:
QUESTION: 24

A radioactive isotope decays at such a rate that after 192 minutes, only 1/16 of the original amount remains. The half-life of the radioactive isotope is

Solution:
QUESTION: 25

Three identical bar magnets are placed in the form of an equilateral triangle with north pole of one touching the south pole of the other as shown in fig. The net magnetic moment of the system is

Solution:
QUESTION: 26

A system exhibiting simple harmonic motion must possess

Solution:
QUESTION: 27

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): A lens of water formed by very thin convex glass layer has lesser focal length than a double convex lens of glass.
Reason(R): Refractive index of glass is more than that of water.

Solution:
QUESTION: 28

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): The path of γ-rays in Wilson's chamber are very thin continuous lines.
Reason(R): γ-rays produce very little ionisation.

Solution:
QUESTION: 29

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): When temperature of gas remains constant, speed of sound changes.
Reason(R) :  (Symbols have their usual meaning)

Solution:
QUESTION: 30

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): Neutrons can be accelerated by cyclotron.
Reason(R): Neutrons are too heavy.

Solution:
QUESTION: 31

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): A small metal ball is suspended in a uniform electric field with an insulated thread. If high energy X-ray beam falls on ball. It will be directed in electric field.
Reason(R): X-ray emits photoelectrons and metal balls become negatively charged.

Solution:
QUESTION: 32

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): When a motor car is started, its head lights become slightly dim.
Reason(R): When the motor car is started , resistance in the path of current increases .

Solution:
QUESTION: 33

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): A uniform sphere is placed on a smooth horizontal surface and a horizontal force F is applied on it at a distance h above the surface. The acceleration of centre is independent of h.
Reason(R): Acceleration depends only on force and mass.

Solution:
QUESTION: 34

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): Two blocks of masses m1 and m2 are at rest. They are moving towards each other under the mutual internal force. The velocity of centre of mass is zero.
Reason(R): If no external force acts on the system, then velocity of centre of mass is unchanged but can never be zero.

Solution:
QUESTION: 35

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): Assertion when sitar and harmonium are played simultaneously in unison, one can easily recognise which note is of harmonium and which is of sitar.
Reason(R): Overtones of the two are different.

Solution:
QUESTION: 36

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): A particle is moving on a circular path with angular velocity ω = ω0 - aθ where θ is the angular displacement then angular displacement (θ) exponentially increases with time.
Reason(R): Angular velocity increases with time linearly.

Solution:
QUESTION: 37

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): When a cell is giving current, then the potential difference V across its plates is less than its emf E.
Reason(R): This difference arises because of the presence of internal resistance in the cell.

Solution:
QUESTION: 38

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): The combination Y = sinωt + cos2ωt is not a simple harmonic function even though it is periodic.
Reason(R): All periodic functions satisfy the relation Y = -kY or  

Solution:
QUESTION: 39

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): Earth's field does not affect the working of a moving coil galvanometer.
Reason(R): Coil is always suspended parallel to earth's field, neutralising to effect .

Solution:
QUESTION: 40

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): Alpha decay and beta decay are accompanied by gamma decay.
Reason(R): On α and β decay, the daughter nucleus is in excited state. It returns to ground state by gamma emission.

Solution:
QUESTION: 41

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): White and black are colours of visible light.
Reason(R): White is the combination of all visible colours in proper proportion while black is the absence of light in a region.

Solution:
QUESTION: 42

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): A uniform solid cylinder rolling with angular velocity ω along a plane surface strikes a vertical rigid wall. Angular velocity of cylinder when it begins to roll up a wall is less than the initial Angular velocity (ω).
Reason(R): After striking the vertical wall angular velocity increases.

Solution:
QUESTION: 43

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): In order to increase the sensitivity of a galvanometer , magnetic field is made as small as possible and angle of twist as large as possible .
Reason(R):  (symbols have their usual meaning).

Solution:
QUESTION: 44

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): The principle of homogeneity of dimensions state that dimensions on both sides of equation must be same
Reason (R) : An equation which is dimensionally correct is also practically correct

Solution:
QUESTION: 45

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): A rocket moves forward by pushing the surrounding air backwards.
Reason(R) : It derives the necessary thrust to move forward according to Newton's third law of motion.

Solution:
QUESTION: 46

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): At the same temperature, the speed of sound in oxygen is one-fourth the speed of sound in hydrogen.
Reason(R): Molecular weight of oxygen is more than the molecular weight of hydrogen .

Solution:
QUESTION: 47

A motor boat is travelling with a speed of 3.0 m/sec. If the force on it due to a water flow is 500 N, the power of the boat is

Solution:
QUESTION: 48

A cricket ball is thrown up with a speed of 19.6 ms⁻1. The maximum height it can reach is

Solution:
QUESTION: 49

A Convex lens is dipped in a liquid whose refractive index is equal to the refractive index of the lens. Then its focal length will

Solution:
QUESTION: 50

The refractive index of glass is 1.520 for red light and 1.525 for blue light. Let D1 and D2 be angels of minimum deviation for red and blue light respectively in a prism of this glass, then,

Solution:
QUESTION: 51

The distance between eye lens and cross wire in Ramsden eye piece which has a field lens of focal length 1.2 cm is .......cm.

Solution:
QUESTION: 52

The potential barrier, in the depletion of layer, is due to

Solution:
QUESTION: 53

Which of the following when added as an impurity into the silicon produces n-type semiconductor?

Solution:
QUESTION: 54

A current I is passed for a time t through a number of voltameters. If m is the mass of a substance deposited on an electrode and z is its electrochemical equivalent, then

Solution:
QUESTION: 55

Decibel is the unit of

Solution:
QUESTION: 56

Given: P = 0.0030 m, Q = 2.40 m and R = 3,000 m. The significant figures in P,Q and R are respectively

Solution:
QUESTION: 57

If ratio of amplitude of two waves is 4:3, then ratio of maximum and minimum intensity is

Solution:
QUESTION: 58

Soap bubble looks coloured due to

Solution:
QUESTION: 59

A Nicol prism can be used

Solution:
QUESTION: 60

A man pushes a wall and fails to displace it. He does

Solution:
QUESTION: 61

Ethanol when reacted with PCl₅ gives A, POCl₃ and HCl. A reacts with silver nitrite to form B(major prouct) and AgCl. A and B respectively are:

Solution:
QUESTION: 62

A compound possesses 8% sulphur by mass. The least molecular mass is

Solution:
QUESTION: 63

The maximum amount of BaCl₄ precipitated on mixing BaCl₂ (0.5 M) with H₂SO₄ (1M) will correspond to

Solution:
QUESTION: 64

Which of the following possesses the highest melting point?

Solution:
QUESTION: 65

Which of the following possesses the highest melting point?

Solution:
QUESTION: 66

Among the following compounds which is most reactive towards nitration

Solution:
QUESTION: 67

The compound used as refrigerant is

Solution:
QUESTION: 68

In graphite, the electrons are

Solution:
QUESTION: 69

In OF₂, number of bond pairs and lone pairs of electrons are respectively

Solution:
QUESTION: 70

Which of the following statement about the catalyst is/are true?

Solution:
QUESTION: 71

The rate of chemical reaction is doubled for every 10ºC rise in temperature due to

Solution:
QUESTION: 72

Calculate the difference between the ΔE AND ΔH for the following reaction at 27ºC (in K.cal)
2SO2(g) + O2(g) → 2SO3(g)

Solution:

R = 2 cals/deg-mole
T = 27ºC = 27 + 273 = 300º A
Δn = No of moles of gaseous products - No of moles of gaseous reactants = 2-3 = -1
ΔH = ΔE + ΔnRT
ΔH − ΔE = ΔnRT = − 1 x 2 x 300 = − 600 cals = − 0.6 K . cal .

QUESTION: 73

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): In aqueous solution , SO2 reacts with H2S liberating sulphur.
Reason(R): SO2 is an effective reducing agent.

Solution:
QUESTION: 74

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): cis-RHC = CHR is less stable than its trans-isomer .
Reason(R): Two R groups may join in cis-isomer to form another compound.

Solution:
QUESTION: 75

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): Formulate has both the C-O bonds have same value 1.27 A.
Reason(R): Same bond length is due to the phenomenon of resonance.

Solution:
QUESTION: 76

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): If an electron strikes a screen coated with ZnS, it produces a spot of light brown as scintillation.
Reason(R): This spot of light indicates wave nature of electron.

Solution:
QUESTION: 77

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): The boiling point of ethanol is much higher than that of diethyl ether.
Reason(R): In ethanol, the molecules are associated by the formation of intermolecular hydrogen bonding whereas in diethyl ether it is not possible.

Solution:
QUESTION: 78

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): In fused state, calcium chloride cannot be used to dry alcohol or NH₃.
Reason(R): CaCl₂ is not a good dessicant.

Solution:
QUESTION: 79

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): OF2 is named as oxygen difluoride.
Reason(R): In OF2 , oxygen is less electronegative than fluorine.

Solution:
QUESTION: 80

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): When K4[Fe(CN)6] is dissolved in water we do not test for CN- ion.
Reason(R): They cyanide ion is an ambidient ligand.

Solution:
QUESTION: 81

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): Rubber is a polymer of isoprene.
Reason(R): Isoprene is a pentene.

Solution:
QUESTION: 82

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): Fresh strain of iodine can be removed by washing with hyposolution.
Reason(R): Hypo reduces iodine to colourless I- ions.

Solution:
QUESTION: 83

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): FeF63- is colourless.
Reason(R): This is because no spin-allowed transitions are possible in Fe3+ (high spin).

Solution:
QUESTION: 84

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): Platinum and gold occur in native state in nature.
Reason(R): Platinum and gold are noble metals.

Solution:
QUESTION: 85

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): Alcohols, ethers and carbohydrates are soluble in water.
Reason(R): Water is non-polar solvent.

Solution:
QUESTION: 86

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): When CoCl3.5NH3 is dissolved in water and treated with excess AgNO3 solution , it gives only two moles of AgCl.
Reason(R): Third chloro is hydrogen bonded to NH3.

Solution:
QUESTION: 87

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): Alkenes are more reactive than alkanes.
Reason(R): Alkenes possess π bonds.

Solution:
QUESTION: 88

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): FeS2 is known as 'fool's gold'.
Reason(R): FeS2 has yellow metallic appearance.

Solution:
QUESTION: 89

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): Phenol is more reactive than benzene towards electrophilic substitution reaction.
Reason(R): In case of phenol, the intermediate carbocation is more resonance stabilised.

Solution:
QUESTION: 90

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): Sulphuric acid is more viscous than water.
Reason(R): In H2SO4 the S atom exhibits its highest oxidation state.

Solution:
QUESTION: 91

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): In acidic medium equivalent weight of K₂Cr₂O₇ equals to 294 same as that of molecular weight.
Reason(R): In acidic medium K₂Cr₂O₇ does not observe any change.

Solution:
QUESTION: 92

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): H₂O₂ can reduce Cl₂ to HCl.
Reason(R): H₂O₂ is also called antichlor.

Solution:
QUESTION: 93

Which of the following is the use of electrolysis?

Solution:
QUESTION: 94

One Faraday of electricity is passed separtely through one litre of one molar aqueous solution of
i) AgNO3, ii) SnCl4 and iii) CuSO4
The number of moles of Ag, Sn and Cu deposited at cathode are respectively

Solution:
QUESTION: 95

According to kinetic theory of gases, a gas molecule travels between two successive collisions

Solution:
QUESTION: 96

Lithium reacts with water but does not fuse in it, because of

Solution:
QUESTION: 97

Molten sodium chloride conducts electricity due to the presence of

Solution:
QUESTION: 98

Compared with the alkaline earth metals, the alkali metals exhibit

Solution:
QUESTION: 99

Bond dissociation energies of HF, HCl, HBr follow the order.......

Solution:
QUESTION: 100

Which of the following alkaline earth metal is most abundant in the earth's crust?

Solution:
QUESTION: 101

Which one of the following pairs of substances on reaction will not evolve H₂ gas ?

Solution:
QUESTION: 102

When 4 gm of NaOH is dissolved in ten litre of solution the pH is

Solution:
QUESTION: 103

The pH of 10 M HCl aqueous solution is

Solution:
QUESTION: 104

The reaction of CH₃MgBr with acetone and hydrolysis of the resulting product gives

Solution:
QUESTION: 105

An example of a salt that will not hydrolyse is

Solution:
QUESTION: 106

When of the following statements is correct ?

Solution:
QUESTION: 107

Which does not contain conjugate system?

Solution:

In dienes, when the double bonds connected to each other by a single bond, this arrangement is known as conjugated.

QUESTION: 108

Most stable alkene is :

Solution:
QUESTION: 109

Conc.HNO3 forms   in presence of:

Solution:
QUESTION: 110

Quartz is a crystalline variety of

Solution:
QUESTION: 111

The addition of HBr to alkenes in the presence of peroxides is called :

Solution:
QUESTION: 112

Which of the following reactant in the presence of AlCl₃ gives acetophenone?

Solution:
QUESTION: 113

Which of the following glass is used in making wind screen of automobiles?

Solution:
QUESTION: 114

How many grams of CH₃OH would have to be added to water to prepare 150 ml a solution that is 2.0 M CH₃OH ?

Solution:
QUESTION: 115

How many kinds of space lattices are possible in a crystal?

Solution:
QUESTION: 116

What is the volume (in litres) of 0.1M H2SO4 required to completely neutralize 1 litre of 0.5M NaOH?

Solution:
QUESTION: 117

Which of the following has a plane of symmetry?

Solution:
QUESTION: 118

What is the molarity of H₂SO₄ solution that has a density of 1.84 gm/cc at 35ºC and contains 98% by weight?

Solution:
QUESTION: 119

Which one of the following pairs of gases contains the same number of molecules

Solution:
QUESTION: 120

Transition elements are frequently used as catalysts because

Solution:
QUESTION: 121

Red cell count is carried out by

Solution: Haemo means blood and cyto mean cell and blood cell are the red one so. option A is correct.
QUESTION: 122

In the following question, a statement of Assertion(A) is given followed by a corresponding statement of Reason(R). Read the statements carefully, and mark the correct answer.
Assertion(A): Vascular cambium is considered as lateral meristem.
Reason(R): It gives rise to lateral shoots.

Solution:

Vascular cambium gives rise to xylem tissue on the inside and phloem on the outside.
Lateral buds contain meristematic cells that give rise to lateral shoots or fruit.

QUESTION: 123

Open blood vascular system without haemoglobin is found in

Solution:
QUESTION: 124

Kiwi/Apteryx occurs in

Solution:
QUESTION: 125

In the following question, a statement of Assertion(A) is given followed by a corresponding statement of Reason(R). Read the statements carefully, and mark the correct answer.
Assertion(A): Agrobacterium tumefaciens is popular in genetic engineering because this bacterium is associated with the roots of all cereal and pulse crops.
Reason(R): A gene incorporated in the bacterial chromosomal genome gets automatically transferred to the crop with which the bacterium is associated.

Solution:

Agrobacterium tumefaciens is a gram negative , non-sporing, motile, rod-shaped bacteria closely related to Rhizobium It is found commonly around root surfaces. The region termed rhizosphere where it seems to survive by using nutrints from the root tissues. It infects only through the wound-site either naturally occuring or caused by transplanting of seeding and nursery stock.
It transfers DNA into plant genomes found in soil worldwide.Agrobacterium tumefaciens causes crown gall disease of a wide range of dicot plants especially members of rose family by transferring its own DNA into plant cells.But in laboratory, the ability to move all sorts of genes into plants has made the microbe the standard tool for investigating plant genetics and modifying crops.

QUESTION: 126

In the following question, a statement of Assertion(A) is given followed by a corresponding statement of Reason(R). Read the statements carefully, and mark the correct answer.
Assertion(A): Antigen can be easily recognized because it has antigenic determinants.
Reason(R): The recognition ability is innate.

Solution:

Antigen is any substance that may be specifically bound by an antibody molecule. The antigens are mostly proteins but can be polysaccharides, glycoproteins, nucleic acid .Each antigen has many antigenic determinants.As each antibody binds with 2 or more such determinants, the one antigen can bind with many antibodies.
The recognition ability is innate and develops without exposure to the antigen. Stem cells differentiate into many million different T and B lymphocytes, each with the ability to respond to a particular antigen.When the antigen first enters the body, it can bind directly to the appropraite receptors on B cells. However, a full antibody response requires that the B cells contact helper T-cells. In the case of T-cells. the antigen is taken up by an antigen presenting cells and partially digested. A peptide fragment of it is presented to the appropriate receptors on T-cells. In either case, the cells are stimulated to divide forming clones of cells that respond to this antigen.

QUESTION: 127

In the following question, a statement of Assertion(A) is given followed by a corresponding statement of Reason(R). Read the statements carefully, and mark the correct answer.
Assertion(A): Inhabitants close to very busy airports are likely to experience health hazards.
Reason(R): Sound level of jet aeroplanes usually exceeds 160 dB.

Solution:

Inhabitants close to very busy airports are likely to experience health hazards. Because maximum acceptable range of sound is 80 to 90 dB. But in the places like airports this level is always exceeds thus it creates sound pollution and related health hazards like auditory fatigue, deafness etc.
Jet planes generally produce sound above 160 dB which is much more than normal level, thus they also produce sound pollution. But as jet aeroplanes are used for some special purposes, they normally do not land in common airports. Thus it has no direct relation in causing sound pollution and related hazards in areas nearby very busy airports.

QUESTION: 128

In the following questions, a statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the statements carefully and mark the answer-
Assertion (A): Cristae are the infoldings of outer membrane of mitochondria.
Reason (R): Electron transport occurs in mitochonodrial matrix.

Solution:
QUESTION: 129

In the following question, a statement of Assertion(A) is given followed by a corresponding statement of Reason(R). Read the statements carefully, and mark the correct answer.
Assertion(A): Petroplants produce large amount of latex.
Reason(R): The latex contains long chain hydrocarbons.

Solution:

Latex of some plants containing long chain hydrocarbons is considered to be a good substitute for liquid fuels or petroleum. Such plants having large amount of latex with long chain hydrocarbons are called petroplants. Cultivation of petroplants is also a part of energy-cropping.Cultivation of these petrocrops was first of all done by Italians in Ethiopia about fifty years back. But Dr. Calvin is given the credit for the petrocropping. The most common petroplants belong to families of Euphorbiaceae, Asclepiadaceae, Apocynaceae, Compositae, Labiatae, Sapotaceae, Urticaceae, etc., which have property of converting large amount of their photosynthates into latex with hydrocarbons. Their hydrocarbon contents can be increased by genetic manipulations. But commerical production of petroleum or liquid fuel alternative is in early stage. The use of these petroplants mey reduce the pressure on liquid fuel or petroleum.

QUESTION: 130

In the following question, a statement of Assertion(A) is given followed by a corresponding statement of Reason(R). Read the statements carefully, and mark the correct answer.
Assertion(A): Many visitor to the hills suffer from skin and respiratory allergy problems.
Reason(R): Conifer trees produce a large quantity of wind-borne pollen grains.

Solution:

In hilly regions many trees like Oak, Elm, Hickory, Pecan and Cedar produce allergic pollen grains which cause allergy to people visiting the hills which results in the respiratory and skin problems.The symptoms of pollen allergy are- sneezing, itching eyes, nose and throat, dark circles under eyes caused by restricted blood flow near the sinuses, watering eyes and conjunctivitis.
Conifer trees produce a large quantity of wind borne pollen grains because many pollen grains are destroyed in the process of pollination done by wind.But these large number of pollen grains cause allergies.

QUESTION: 131

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason(R) just below it. Read the Statement carefully and mark the correct answer-
Assertion(A): Protostele is the simplest type of stele.
Reason (R): Siphonostele has pith in the centre.

Solution:
QUESTION: 132

In the following question, a statement of Assertion(A) is given followed by a corresponding statement of Reason(R). Read the statements carefully, and mark the correct answer.
Assertion(A): Generally, a woman does not conceive during the lactation period.
Reason(R): The hormone 'prolactin' initiates and maintains lactation in a postpartum woman.

Solution:

Generally a woman does not conceive during the lactation period. LActation stimulates prolactin secretion and there is evidence that prolactin inhibits GnRH secretion and antagonizes the action of gonadotropins on the ovaries. Ovulation is inhibited and the ovaries are inactive so estrogen and progestrone output falls to low levels.Only 5 to 10 % chances of getting pregnant are there during lactation period.
Prolactin is a protein hormone of the adenohypophysis of the pituitary gland that induces and maintains lactation in the postpartum mammalian female .

QUESTION: 133

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason(R) just below it. Read the Statement carefully and mark the correct answer-
Assertion(A): Tendon is present in all bone joints.
Reason (R): Tendon connects the bones at the joints and holds them in position.

Solution:
QUESTION: 134

In the following question, a statement of Assertion(A) is given followed by a corresponding statement of Reason(R). Read the statements carefully, and mark the correct answer.
Assertion(A): The number of cells in a multicellular organism is inversely proportional to the size of body.
Reason(R): All the cells in the biological world are of same size.

Solution:

The number of cells in a multicellular organism is directly proportional to the body size. The cells vary greatly in their size. Mycoplasma cells, ranging from 0.1 to 0.3 nm are the smallest, whereas human cells generally range from 20 to 30 μm. Nerve cells are the largest.

QUESTION: 135

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason(R) just below it. Read the Statement carefully and mark the correct answer-
Assertion(A): Stratification of seeds may promote their germination.
Reason (R): Stratification promote gibberelin and cytokinins.

Solution:
QUESTION: 136

In the following question, a statement of Assertion(A) is given followed by a corresponding statement of Reason(R). Read the statements carefully, and mark the correct answer.
Assertion(A): A correct concentration of auxin and cytokinin is required for the development of root and shoot in a callus.
Reason(R): When the ratio of kinetin to auxin is high, then only shoots develop. But when the ratio is low then only roots develop.

Solution:

The relative ratio of cytokinin to auxin (IAA) was considered important in determining the nature of organogenesis in tobacco pith tissue. It was shown that high level of kinetin caused bud initiation, while high concentration of auxin favoured rooting.

QUESTION: 137

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason(R) just below it. Read the Statement carefully and mark the correct answer-
Assertion(A): Guard cells are specialised epidermal cells.
Reason (R): Stomata are found in the epidermis of leaves.

Solution:
QUESTION: 138

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason(R) just below it. Read the Statement carefully and mark the correct answer-
Assertion(A): The flowers of Hypanthodium are never exposed.
Reason (R): Hypanthodium flowers are bisexual.

Solution:
QUESTION: 139

In the following question, a statement of Assertion(A) is given followed by a corresponding statement of Reason(R). Read the statements carefully, and mark the correct answer.
Assertion(A): Deforestation is one main factor contributing to global warming.
Reason(R): Besides CO2, two other gases methane and CFCs are also included under green house gases.

Solution:

Deforestation increases atmospheric CO2 content by releasing carbon stored in organic matter and reduced primary productivity . So deforestation is one of the main factors contributing to global warming other than green house gases. the various green house gases are CO2 ,CH4,CFCs and nitrogen oxide N2O. Due to increase of CO2 concentration, the absorption of heat radiation also increase thus increasing the temperature.Thisincrease in temperature may cause melting of Glaciers and polar ice caps, which is called global warming. This melting of glaciers and polar ice results in raising the sea level. Actually these green house gases absorb infra red radiations of the sun like glass and thus traps the heat and does not allow it to radiate back to the space. They instead radiate the heat back to earth, thus causing increase in temperature.

QUESTION: 140

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason(R) just below it. Read the Statement carefully and mark the correct answer-
Assertion(A): Amensalism is a negative interaction between two living individuals.
Reason (R): In amensalism, allochemics are secreted by one individual.

Solution:
QUESTION: 141

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason(R) just below it. Read the Statement carefully and mark the correct answer-
Assertion(A): Low annual rainfall occurs in deserts.
Reason (R): Deserts may be hot or cold.

Solution:
QUESTION: 142

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason(R) just below it. Read the Statement carefully and mark the correct answer-
Assertion(A): Cytochromes are a group of a copper-containing electron transferring proteins.
Reason (R): The terminal cytochrome reacts with oxygen.

Solution:
QUESTION: 143

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason(R) just below it. Read the Statement carefully and mark the correct answer-
Assertion(A): The skin of banana represents only epicarp.
Reason (R): The edible part of banana is mesocarp.

Solution:
QUESTION: 144

Cellulose is

Solution:
QUESTION: 145

Which of the following is a characteristic of systemic circulation?

Solution:
QUESTION: 146

Respiratory Quotient (RQ) for fat is-

Solution:
QUESTION: 147

Two glands that are responsible for secreting protein-digesting enzymes are

Solution:
QUESTION: 148

Pyrethrum is obtained from

Solution:
QUESTION: 149

Which of the following pairs is not correctly matched ?

Solution:
QUESTION: 150

Fossils of neanderthal were first obtained from Neander valley in

Solution:
QUESTION: 151

Biofertilizers are

Solution:
QUESTION: 152

Major source of sugar in the world is

Solution:
QUESTION: 153

Which of the following element was added by Meselson and Stahl that contained an extra neutron ion its nucelus to E. coli growing on media ?

Solution:
QUESTION: 154

Which of the following is used mostly in genetic engineering ?

Solution:
QUESTION: 155

Colour blindness is disease in which the factor is usually transmitted to children by woman. It is because the factor is located on

Solution:
QUESTION: 156

Asthama is a respiratory disorder due to

Solution:
QUESTION: 157

Which is not an immunological technique?

Solution:
QUESTION: 158

Genetic traits are often carried on separate chromosomes. Which of the following genotype represents a dihybrid organism?

Solution:
QUESTION: 159

Most abundant immunoglobulin is

Solution:
QUESTION: 160

AIDS is

Solution:
QUESTION: 161

Magnetium is absent in which of the following pigment ?

Solution:
QUESTION: 162

Characteristic pigment of cyanobacteria is

Solution:
QUESTION: 163

Monerans comprise

Solution:
QUESTION: 164

Cauliflory is

Solution:
QUESTION: 165

Which of the following explains why most organs are supplied by two separate autonomic nerves?

Solution:
QUESTION: 166

Ribulose biphosphate carboxylase oxygenase is located inside

Solution:
QUESTION: 167

Compensation point is the value of a factor where there is

Solution:
QUESTION: 168

Secondary growth occurs through

Solution:
QUESTION: 169

The first antibiotic was discovered by

Solution:
QUESTION: 170

Vascular bundle are absent in

Solution:
QUESTION: 171

The high amount of E.coli in water, is the indicator of

Solution:
QUESTION: 172

Lysine is an essential amino acid as it is

Solution:
QUESTION: 173

Lutein cells are found in

Solution:

The cells of the corpus luteum which are derived from the granulosa cells and the theca cells of the graafian follicle

QUESTION: 174

'Apomixis' term was given by

Solution:
QUESTION: 175

Which of the following, if present in urine samples, would indicate pregnancy?

Solution:
QUESTION: 176

The exchange of oxygen and carbon dioxide in external respiration occurs by

Solution:
QUESTION: 177

Nuclear DNA sends information for protein synthesis through :

Solution:
QUESTION: 178

Industrial melanism is an example of

Solution:
QUESTION: 179

Human vertebral formula is

Solution:
QUESTION: 180

Cyanobacteria are

Solution:
QUESTION: 181

New research suggests that the idea that modern people evolved in a single “cradle of humanity” in East Africa some 200,000 years ago is no longer tenable. Fossils of early humans, at least 100,000 years earlier than previously recognised, were found in which one of the following regions?

Solution:
QUESTION: 182

‘Subduction’ would most likely occur along which of the following plate tectonic boundaries?

Solution:
QUESTION: 183

When the same note is played on a sitar and a flute, the sound produced can be distinguished from each other because of the difference in

Solution:
QUESTION: 184

The first Indian-American woman to go into space was

Solution:
QUESTION: 185

Essential oils are those oils which

Solution:
QUESTION: 186

The first successful heart transplant in India was performed by

Solution:
QUESTION: 187

How many Indians have won the Nobel Prize for literature?

Solution:
QUESTION: 188

Alternate spells of rains and sunny weather are necessary for the cultivation of

Solution:
QUESTION: 189

13th Asian Games were held in

Solution:
QUESTION: 190

The abbreviation 'OAS' stands for: