Question

Number of types of polypeptides and the structure of each polypeptide in human haemoglobin molecule, respectively are
(A) 4 and secondary
(B) 2 and quaternary
(C) 2 and primary
(D) 2 and tertiary​

Answer 1

Answer:

Protein Structure. The 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. The alpha and beta chains have different sequences of amino acids, but fold up to form similar three-dimensional structures

Explanation:

A) 4 and secondary

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