Identify the INCORRECT statement about the human digestive system: MCQ with Answer and Explanation

Identify the INCORRECT statement about the human digestive system:
A. The pancreas secretes amylase.
B. The stomach secretes hydrochloric acid.
C. The small intestine is the main site of nutrient absorption.
D. The large intestine produces digestive enzymes.
Answer: Option D
Solution (By JKExamLibrary)
The large intestine does not produce digestive enzymes; it absorbs water and electrolytes. The small intestine and pancreas produce enzymes.

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Tocopherol is the chemical name of which vitamin?
A. Vitamin B₁₂
B. Vitamin K
C. Vitamin E
D. Vitamin A

Correct Answer: Option C


Explanation:
Vitamin E is a group of tocopherols and tocotrienols, acting as fat-soluble antioxidants. They protect cell membranes from oxidative damage. Deficiency is rare but can cause hemolytic anemia and neurological problems.

This question belongs to: Science Biology
Question #2
In the light reaction of photosynthesis, which photosystem is involved in the photolysis of water?
A. Both PSI and PSII
B. Photosystem II (PSII)
C. Photosystem I (PSI)
D. Neither PSI nor PSII

Correct Answer: Option B


Explanation:
Photosystem II (PSII), also known as P680, is the first photosystem in the non-cyclic electron transport pathway (Z-scheme). It is responsible for the photolysis of water, a process where water molecules are split into oxygen, protons (H+), and electrons. This oxygen is released as a byproduct of photosynthesis.

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Question #3
The organ that produces bile and detoxifies the blood is the:
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B. Pancreas
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Correct Answer: Option C


Explanation:
The liver is the body's largest internal organ, performing metabolism, detoxification, bile production, and protein synthesis. The gall bladder stores bile.

This question belongs to: Science Biology