Question

Which of the following statements are correct? (a) Haemoglobin consist of four protein chains called globins (b) Alfa chain of haemoglobin contain 141 amino acids (c) HbA2 is a adult haemoglobin which has two delta chains in place of beta chains (d)Fetal haemoglobin (HbF) which has two gamma chains in place of the beta chains

• A. (a) and (b) only
• B. (a) and (d) only
• C. (c) and (d) only
• D. All are correct

Answer 1

Answer:

D. All are correct

Hemoglobin is a protein made up of four polypeptide chains, or subunits, called globin chains: α-chains, β-chains, γ-chains, and δ-chains. There are three types of normal hemoglobin, each made up of a different combination of the four globin chains: Hb A: The most common type of hemoglobin in adults, made up of two α-globin chains and two β-globin chains Hb A2: Made up of two α-globin chains and two δ-globin chains Hb F: Also known as fetal hemoglobin, made up of two α-globin chains and two γ-globin chains