Question

Choose the incorrect statement with respect to a mature human haemoglobin molecule.

• A. It has a quaternary structure
• B. Two subunits are of $\alpha$-type while two are of $\beta$-type
• C. It is a simple protein
• D. Present in the cytoplasm of RBCs

Answer 1

The correct option is C It is a simple protein

Haemoglobin is a conjugated metalloprotein. It is a globular iron-containing pigment protein. It gives blood its red colour and can be found in the cytoplasm of RBCs. The prosthetic or non-protein part consists of a heme group containing iron. The protein part consists of four polypeptide chain - two alpha chains and two beta chains$\left(\alpha 2\beta 2\right)$.