Question

Insulin (bovine) has $51$ amino acids in $A$ and $B$ polypeptides. The polypeptide $A$ possesses amino acids

• A. $31$
• B. $21$
• C. $20$
• D. $30$

Answer 1

The correct option is B $21$

Insulin is a hormone produced by the pancreas gland. It is specifically secreted by the beta cells of the pancreas. It regulates the amount of glucose in the blood. The excess of glucose is converted to glycogen by the insulin. It consists of two polypeptide chain which are linked by the disulphide bonds. The two polypeptide chains contains 51 amino acid with 21 amino acids in first chain (A) and 30 amino acids in the second chain (B).

So, the correct answer is option B.