How Many Alpha and Beta Chains are Present in a HbA

Question

How many alpha and beta chains are present in a HbA molecule?
A) 141 alpha and 146 beta chains
B) 2 alpha and 2 beta chains
C) 146 alpha and 141 beta chains
D) 1 alpha and 1 beta chain

Accepted Answer

Hemoglobin A (HbA), the most common form of hemoglobin in adults, is a tetramer consisting of two alpha (α) chains and two beta (β) chains, making option B correct.