55.
Insulin is made up of
A:
A single polypeptide chain having 51 amino acid residues
B:
A single polypeptide chain having 84 amino acid residues
C:
A-chain having 21 and B-chain having 30 amino acid residues
D:
A-chain having 30 and B-chain having 21 amino acid residues
The answer is:
C