NEET Test 92

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NEET Test 92

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Weekly Quiz Competition

Question 1
4 / -1

has 92 protons and 238 nucleons. It decays by emitting an alpha particle and becomes

A

B

C

D

Solution
Question 2
4 / -1

Withdrawal of which hormone is the immediate cause of menstruation?

A
Estrogen

B
FSH

C
FSH-RH

D
Progesterone

Solution

After ovulation, the pituitary hormones FSH and LH cause the remaining parts of the dominant follicle to transform into the corpus luteum, which produces progesterone. The increased progesterone in the adrenals starts to induce the production of estrogen. The hormones produced by the corpus luteum also suppress production of the FSH and LH that the corpus luteum needs to maintain itself. Consequently, the level of FSH and LH fall quickly over time, and the corpus luteum subsequently atrophies. Falling levels of progesterone trigger menstruation and the beginning of the next cycle.

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

A particle is performing linear Simple harmonic motion. What fraction of the total energy is potential, with the displacement is half the amplitude?

A
0.33

B
0.75

C
0.5

D
0.25

Solution
Question 4
4 / -1

Which one of the following statements is true regarding digestion and absorption of food in humans?

A
Fructose and amino acids are absorbed through intestinal mucosa with the help of carrier ions like N⁺

B
Chylomicrons are small lipoprotein particles that are transported from intestine into blood capillaries

C
About 60% of starch is hydrolyzed by salivary amylase in our mouth

D
Oxyntic cells in our stomach secrete the proenzyme pepsinogen

Solution

Fructose and amino acids are absorbed through intestinal mucosa with the help of carrier ions like N⁺is true regarding digestion and absorption of food in humans.

After digestion, most of the monosaccharides are absorbed into the body via active transport using sodium ions. Fructose is absorbed via facilitated diffusion. Amino acids are absorbed via secondary active transport using sodium ions. Chylomicrons cannot enter blood capillaries and hence enter lacteals. Only 5% of starch is hydrolyzed in the mouth. Proenzyme pepsinogen is secreted by chief cells in the stomach.

Hence, the correct option is (A).
Question 5
4 / -1

A wheel with 10 metallic spokes each 0.5 m long is rotated with a speed of 120 rev/min in a plane normal to the horizontal component of earth's magnetic field H_E at a place. If H_E= 0.4G at the place, what is the induced emf between the axle and the rim of the wheel? Note that 1G = 10⁻⁴ T.

A
6.28 × 10^-5 V

B
4.28 × 10^-5 V

C
4.48 × 10^-5 V

D
3.28 × 10^-5 V

Solution

The number of spokes is immaterial because the emf's across the spokes are in parallel.

Hence, the correct option is (A).
Question 6
4 / -1

The ratio of the radii of gyration of a circular disc about a tangential axis in the plane of the disc and a circular ring of the same radius about a tangential axis in the plane of the ring is:

A
2 : 3

B
2 : 1

C

D
1 : √2

Solution

Moment of inertia of a circular disc about a tangential axis in the plane of disc

Moment of inertia of a circular ring of same radius about a tangential axis in the plane of the ring is

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

In the equilibrium , which of the following statements is/are correct?

A
F⁻ is the conjugate acid of CH₃COOH

B
F⁻ is the conjugate base of HF

C
CH₃COOH is the conjugate acid of

D
is the conjugate base of CH₃COOH

Solution
Question 8
4 / -1

Haemozoin is a toxic substance released upon which of the following events?

A
Rupture of liver cells

B
Rupture of cells of gut epithelium

C
Rupture of RBCs

D
Rupture of cells of salivary glands

Solution

The Plasmodium species during malarial formation, metabolize hemoglobin and other RBC proteins to create a toxic pigment called hemozoin. Haemozoin is a waste product formed when the parasite digests the blood. The parasite digests the hemoglobin of the blood and release high quantities of free heme. This heme released is a non-protein component of hemoglobin. The haemozoin is, therefore, a product of the erythrocyte lysis released from the food vacuole into circulation.

Hence, the correct option is (C).
Question 9
4 / -1

The function sin²⁡(ωt) represents :

A
A simple harmonic motion with a period 2π/ω

B
A simple harmonic motion with a period π/ω

C
A periodic, but not a simple harmonic motion with a period 2π/ω

D
A periodic, but not simple harmonic motion with a period π/ω

Solution
Question 10
4 / -1

To verify ohm's law, a student is provided with a test resistor R_T a high resistance R₁ a small resistance R₂ two identical galvanometers G₁ and G₂ and a variable voltage source V. The correct circuit to carry out the experiment is:

A

B

C

D

Solution

To verify ohm's law, one galvanometer is used as ammeter and another galvanometer as voltmeter.

Voltmeter should have high resistance (connected in parallel) ammeter should have low resistance (connected in series)

Given: R₁-high resistance, R₂- low resistance

∴ R₁ should be parallel to voltmeter and R₂ should be series with ammeter.

Hence, the correct option is (C).