Question

The polypeptide chains of hemoglobin A are composed of: (a) 1 alpha, 3 beta (b) 2 alpha (c) 2 alpha, 2 beta (d) 1 alpha, 2 beta, 1 delta​

Answer 1

Answer:

Explanation:

A hemoglobin molecule is made up of four polypeptide chains, two alpha chains of 141 amino acid residues each and two beta chains of 146 amino acid residues each. In the complete molecule, four subunits are closely joined, as in a three-dimensional jigsaw puzzle, to form a tetramer.