NEET Test 83

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NEET Test 83

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Weekly Quiz Competition

Question 1
4 / -1

For the start of respiration, a living cell requires:

A
Glucose

B
Glucose + O₂

C
O₂

D
Glucose + ATP

Solution

The mechanism of respiration is initiated by breaking down glucose to pyruvic acid without the help of oxygen. The initial process occurs in the cytosol of cells which requires glucose as well as ATP molecules which provide energy for the process to start. This initial process is known as glycolysis and it takes place in 10 steps in which total of 4 ATP molecules are produced and 2 ATP molecules are consumed. Thus, these are the net production of 2 ATP molecules.

Hence, the correct option is (D).
Question 2
4 / -1

Direction: Given below is a diagrammatic sketch of a portion of human male reproductive system.

Select the correct set of the names of the parts labelled A, B, C, D.

A
A-Ureter, B-Prostate, C-Seminal vesicle, D-Bulbourethral gland

B
A-Vas deferens, B-Seminal vesicle, C-Prostate, D-Bulbourethral gland

C
A-Vas deferens, B-Seminal vesicle, C-Bulbourethral gland, D-Prostate

D
A-Ureter, B-Seminal vesicle, C-Prostate, D-Bulbourethral gland

Solution

The correct set of the names of the parts labelled A-Vas deferens, B-Seminal vesicle, C-Prostate, D-Bulbourethral gland.

The Vas deferens is the muscular tube that travels from epididymis into the pelvic cavity to just behind the bladder.

The Seminal vesicle is a pair of exocrine glands that are located posterior to the urinary bladder and anterior to the rectum.

The Prostate gland is an exocrine gland that borders the urinary bladder and surrounds the urethra.

The Bulbourethral glands are located on the sides of urethra just below the prostate gland.

Hence, the correct option is (B).
Question 3
4 / -1

A synthetic rubber which is resistant to the action of oils, gasoline and other solvents is:

A
Buna-S

B
Polyisoprene

C
Neoprene

D
Polystyrene

Solution

A synthetic rubber which is resistant to the action of oils, gasoline and other solvents is Neoprene. Neoprene is synthetic rubber. It is a polymer of chloroprene and is resistant to the action of oils, gasoline and other solvents.

Hence, the correct option is (C).
Question 4
4 / -1

Which of the following is not correct about carbon monoxide?

A
It forms carboxyhaemoglobin

B
It reduces the oxygen-carrying ability of blood

C
The carboxyhaemoglobin (haemoglobin bound to CO) is less stable than oxyhaemoglobin

D
It is produced due to incomplete combustion
Question 5
4 / -1

A ray of light traveling in the air is incident on the plane of a transparent medium. The angle of the incident is 45^∘ and that of refraction is 30^∘. Find the refractive index of the medium.

A
2

B
1/√2

C
2/√2

D
√2

Solution
Question 6
4 / -1

The temperature of a gas is raised while its volume remains constant, the pressure exerted by the gas on the walls of the container increases because its molecules:

A
Lose more kinetic energy to the wall

B
Are in contact with the wall for a shorter time

C
Strike the wall more often with higher velocities

D
Collide with each other with less frequency

Solution

Due to the increase in temperature root-mean-square velocity of gas molecules increases. So, they strike the wall more often with higher velocity. Hence, the pressure exerted by a gas on the walls of the container increases.

Hence, the correct option is (C).
Question 7
4 / -1

An open U-tube contains mercury. When 11.2 cm of water is poured into one of the arms of the tube, how high does the mercury rise in the other arm from its initial level?

A
0.56 cm

B
1.35 cm

C
0.41 cm

D
2.32 cm

Solution

At the same level in the two limbs of a U-tube, the pressure is the same. On pouring water on the left side, mercury rises x cm (say) from its previous level in the right limb of the U-tube creating a difference of levels of mercury by 2x cm.

Equating pressures at A and B, we get
Question 8
4 / -1

A wheel is rotating at the rate of 33 revolution/min. if it comes to a stop in 20 seconds. Then the angular retardation will be

A
0

B
11π rad / s²

C
π/200 rad / s²

D
11π/200 rad / s²

Solution
Question 9
4 / -1

In the following reaction

Which two substances are Bronsted base?

A

B

C

D

Solution
Question 10
4 / -1

The most common substrate used in distilleries for the production of ethanol is:

A
Soya meal

B
Ground gram

C
Molasses

D
Corn meal

Solution

The most common substrate used in distilleries for the production of ethanol is molasses.

Molasses are used commonly in distilleries for ethanol production. Saccharomyces cerevisiae is an industrial yeast possessing most of the desirable fermentation characteristics like fast growth and fermentation rate, osmo-tolerance, high ethanol tolerance, ability to ferment molasses, and to ferment at elevated temperatures etc.

Hence, the correct option is (C).