Question

Identify the polypeptide subunits present in the adult human haemoglobin.

• A. Two $\alpha$ type subunits and two $\beta$ type subunits
• B. Four $\alpha$ type subunits
• C. Three $\alpha$ type subunits
• D. Three $\alpha$ type subunits and one $\beta$ type subunits

Answer 1

The correct option is A Two $\alpha$ type subunits and two $\beta$ type subunits

Haemoglobin is an oxygen-binding protein found in the red blood cells of the vertebrates. It readily combines with oxygen to form oxyhemoglobin and supply oxygen to various part of the body from lungs. It is tetrameric hemeprotein made up of four polypeptide subunits of two alpha and two beta chains. Thus the correct answer is option A.