The enzyme pepsin is secreted by which cells of the stomach? MCQ with Answer and Explanation

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The enzyme pepsin is secreted by which cells of the stomach?

A. Goblet cells

B. G cells

C. Parietal cells

D. Chief cells

Answer: Option D

Solution (By JKExamLibrary)

Chief (peptic) cells secrete pepsinogen, which is activated to pepsin by HCl. Parietal cells secrete HCl and intrinsic factor. Goblet cells secrete mucus.

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Question #1

The largest gland in the human body is:

A. Pancreas

B. Liver

C. Pituitary

D. Thyroid

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Correct Answer: Option B

Explanation:
The liver is the largest internal organ and gland, weighing about 1.5 kg. It performs metabolic, detoxification, and synthetic functions.

This question belongs to: Science Biology

Question #2

Which of the following statements about the nephron is correct?

A. The collecting duct actively transports glucose.

B. The proximal tubule reabsorbs most of the glucose and amino acids.

C. Bowman’s capsule surrounds the loop of Henle.

D. Glomerular filtrate contains large proteins and cells.

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Correct Answer: Option B

Explanation:
Proximal convoluted tubule reabsorbs glucose, amino acids, and most water. Bowman’s capsule surrounds glomerulus; filtrate lacks proteins and cells; collecting duct concentrates urine.

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Question #3

The process of taking in oxygen and releasing carbon dioxide is called:

A. Digestion

B. Respiration

C. Excretion

D. Circulation

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Correct Answer: Option B

Explanation:
Respiration includes external respiration (breathing, gas exchange) and internal respiration (cellular metabolism). Digestion is food breakdown, circulation is transport, excretion is waste removal.

This question belongs to: Science Biology

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