Question

The total number of amino acids in human insulin (total number of amino acids in A and B chain) is

• A. 51
• B. 84
• C. 32
• D. 08

Answer 1

The Correct Option is A

The question asks for the total number of amino acids present in human insulin, specifically in both its A and B chains.

Insulin is a peptide hormone that plays a crucial role in regulating blood sugar levels. It is composed of two polypeptide chains, known as the A chain and the B chain, linked together by disulfide bonds.

1. Understanding Insulin Structure:
   The human insulin molecule is composed of two chains:
   • The A chain consists of 21 amino acids.
   • The B chain consists of 30 amino acids.
2. Calculating the Total Number of Amino Acids:
   To find the total number of amino acids in both chains, we simply add the number of amino acids in the A chain to those in the B chain:
   21 + 30 = 51
3. Conclusion:
   The total number of amino acids in human insulin is 51, which confirms the correct answer is \boxed{51}.

Therefore, among the provided options, 51 is the correct number of amino acids in human insulin.