Previous year MCQs

General science UPPSC 2017 GS-I
Question

Given below are two statements:

Assertion [Al: Human body is incapable of digesting cellulose.
Reason [R]: Starch degrading enzyme, diastase, is found in the human body.

Choose the answer from the code given below:
Codes:

Answer & Solution

Answer: (Detailed Solution Below)

Option B: Both [Al and [R] are true but [RI is not the correct explanation of [A]

Detailed Solution:

The correct answer is “Both [Al and [R] are true but [RI is not the correct explanation of [A]”.
Humans do not have the enzyme necessary to break down cellulose, which is a component of plant cell walls. This is why humans cannot digest cellulose.

Diastase, an enzyme that breaks down starch, is found in the human body. However, it is not involved in the digestion of cellulose. Starch is a carbohydrate and a natural component of most plants, including fruits, vegetables, and grains.

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