Previous year MCQs

General science UPPSC 2019 GS-I
Question

Which of the following substances is not a protein ?

Answer & Solution

Answer: (Detailed Solution Below)

Option A: Cotton

Detailed Solution:

The correct answer is “Cotton”.
Cotton is not a protein.

Cotton is a natural fiber made primarily of cellulose, a carbohydrate, not a protein. The other substances listed (hair, spider silk, and hoof) are all composed of proteins.

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