Home PYQs UPPSC UPPSC MCQs Prelims 2019 (GS Paper I)

Question

Which of the following substances is not a protein ?

  1. Cotton
  2. Hair
  3. Spider Silk
  4. Hoof

Answer:

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.