NEET

EXAM PREP

Eduinfy provide you digital online & effective learning for entrance exams .

Practice Test

Question Bank

1 Biodiversity and Conservation

A gene bank is a place where

1) tissues of plants entered into Red Data Book are maintained by means of tissue culture
2) the DNAs of all plants and animals in danger of extinction are cryopreserved
3) plant material likely to get lost irretrievably is preserved as seeds or vegetative material
4) all of the above

Option 1

Option 2 Solution:

Solution

Gene banks are a type of biorepository that preserves genetic material. For plants, this is done by in vitro storage, freezing cuttings from the plant, or stocking the seeds (e.g. in a seedbank).

For animals, this is done by the freezing of sperm and eggs in zoological freezers until further need.

With corals, fragments are taken which are stored in water tanks under controlled conditions.

Plant genetic material in a 'gene bank' is preserved at -196 celsius in liquid nitrogen as mature seed dry.

Ex-situ conservation of plant genetic resources can be achieved through different methods such as seed banks, field gene banks, in-vitro storage methods, pollen banks and DNA banks.

Option 3

Option 4

2 Kinetic Theory of gases

If the degrees of freedom of a gas are f, the ratio of its two specific heats, C_P/C_V, is given by:

1) 1 - (1/f)
2) 1 – (2/f)
3) 1 + (1/f)
4) 1 + (2/f)

Option 1

Option 2

Option 3

Option 4 Solution:

In India musa genera represents how many species?
1) 2
2) 10
3) 17
4) 5

Option 1

Option 2 Solution:

Option 3

Option 4

Which of the following does not require carrier molecules during transport through cell membranes ?

1) simple diffusion
2) facilitated diffusion
3) Na+ - K+ transport
4) active transport of sugars and aminoacids

Option 1 Solution:

Option 2

Option 3

Option 4

5 Motion of System of Particles and Rigid Body

A mass is whirled in a circular path with a constant angular velocity and its angular momentum is L. If the length of string is now halved keeping the angular velocity the same, the new angular momentum is:

1) L /4
2) L /2
3) L
4) 2L

Option 1 Solution:

Solution

Angular momentum, $$L= mvr$$

Also $$v=r\omega \implies L= mr^2\omega$$

Now, $$r_2= \dfrac{r}{2}$$ (putting it in the earliar equation to get new momentum)

Thus $$ L_2= m\dfrac{r^2}{4}\omega$$

$$\implies L_2= \dfrac{L}{4}$$

Option 2

Option 3

Option 4

Development of fruit without fertilization is termed

(1) parthenogenesis

(2) apomixes

(3) parthenocarpy

(4) apogamy

Option 1

Option 2

Option 3 Solution:

Option 4

7 Structural Organisation in Animals

In Cockroach, nymphal characters are maintained by

1) Ecdysone
2) Salivary glands
3) Parotid gland
4) Juvenile hormone

Option 1

Option 2

Option 3

Option 4 Solution:

SOLUTION

Nymph is the immature form of some invertebrates, particularly insects, which undergoes gradual metamorphosis (hemimetabolism) before reaching its adult stage.

Juvenile hormone is produced by corpora allata in insects, it favors the development of juvenile characteristics. During larval life, this hormone predominates and each moult yields another larger juvenile and keeps the larva in immature condition or maintains juvenility.

Ecdysone is a steroidal, moulting hormone of prothoracic gland, in insects that triggers metamorphosis.

Parotid glands secretes serous saliva through the parotid duct into the mouth, to facilitate mastication and swallowing and to begin the digestion of starches

8 Stoichiometry

Zinc sulphate contains 22.65% of zinc and 43.9% of water of crystallization. If the law of constant proportions is true, then the weight of zinc required to produce 20g of the crystals will be

1) 45.3g
2) 4.53g
3) 0.453g
4) 453g

Option 1

Option 2 Solution:

Solution

100g of crystals are obtained from =22.65g of Zn

∴ 20g of crystals are obtained from =22.65 ×20/ 100

⇒ 4.53g

Option 3

Option 4

9 Thermodynamics

A vertical closed cylinder is separated into two parts by a frictionless piston of mass m and of negligible thickness. The piston is free to move along the length of the cylinder. The length of the cylinder above the piston is ?1, and that below the piston is ?2 , such that ?1 > ?2 . Each part of the cylinder contains n moles of an ideal gas at equal temperature T. If the piston is stationary, its mass, mm, will be given by :

(R is universal gas constant and g is the acceleration due to gravity)

1) $$\dfrac{nRT}{g} \left[\dfrac{1}{\ell_2} + \dfrac{1}{\ell_1}\right]$$
2) $$\dfrac{nRT}{g} \left[\dfrac{\ell_1 - \ell_2}{\ell_1\ell_2} \right]$$
3) $$\dfrac{RT}{g} \left[\dfrac{2\ell_1 + \ell_2}{\ell_1\ell_2} \right]$$
4) $$\dfrac{RT}{g} \left[\dfrac{\ell_1 - 3\ell_2}{\ell_1\ell_2} \right]$$

Option 1

Option 2 Solution:

Solution

$$P_2A = P_1A + mg$$

$$\dfrac{nRT.A}{A\ell_2} = \dfrac{nRT.A}{A\ell_1} + mg$$

$$nRT \left(\dfrac{1}{\ell_2} - \dfrac{1}{\ell_1}\right) = mg$$

$$m = \dfrac{nRT}{g} \left(\dfrac{\ell_1 - \ell_2}{\ell_1\ell_2}\right)$$

Option 3

Option 4

10 Capacitance

A 20μF capacitor is charged to potential of 500V and is connected to another 10μF capacitor charged to 200V in parallel. The charging batteries are disconnected. The final potential across the combination is:

1) 233.33V

2) 400V

3) 1200V

4) 600V

Option 1

Option 2 Solution:

Solution

We know charge==capacity × voltage

So final voltage = Q_net / C_net

Q_net=Q1+Q2 = C1V1 + C2V2

In parallel the Cnet=C₁+C₂ = 30μF

So putting Corresponding Values we get final voltage as 400V

Option 3

Option 4

More Courses

MOCK TEST

NEET Mock Test 1

NEET

Attempt

Biology Mock Test paper 3

Biology

Attempt

Biology Mock Test paper 7

Biology

Attempt

Physics Mock Test paper 2

Physics

Attempt

Biology Mock Test paper 5

Biology

Attempt

Physics Mock Test paper 4

Physics

Attempt

Biology Mock Test paper 6

Biology

Attempt

Biology Mock Test paper 8

Biology

Attempt

Chemistry Mock Test paper 4

Chemistry

Attempt

NEET Mock Test 5

NEET

Attempt

Physics Mock Test paper 3

Physics

Attempt

Biology Mock Test paper 10

Biology

Attempt

Biology Mock Test paper 1

Biology

Attempt

Physics Mock Test paper 1

Physics

Attempt

Chemistry Mock Test paper 1

Chemistry

Attempt

Chemistry Mock Test paper 3

Chemistry

Attempt

Biology Mock Test paper 9

Biology

Attempt

NEET Mock Test 3

NEET

Attempt

Chemistry Mock Test paper 2

Chemistry

Attempt

Chemistry Mock Test paper 5

Chemistry

Attempt

Biology Mock Test paper 2

Biology

Attempt

Physics Mock Test paper 5

Physics

Attempt

Biology Mock Test paper 4

Biology

Attempt

NEET Mock Test 2

NEET

Attempt

NEET Mock Test 4

NEET

Attempt

SMS Notifications

Change

Mock Test