An insulin molecule is made up of how many polypeptide chains?
Correct answer: C. 2
- A. 1
- B. 3
- C. 2
- D. 4
Explanation
Insulin is a protein made up of two polypeptide chains referred to as the A chain and the B chain. A chain contain 21 amino acids while B chain contains 30 amino acids Option A,B and D are incorrect
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Proteins are polymers of amino acids joined by peptide bonds, and their function depends on primary, secondary, tertiary and quaternary structure. The topic covers fibrous and globular proteins, enzymes, antibodies, hormones and transport proteins, as well as denaturation by heat or extreme pH.
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