Which of the Following Domain Types is Unique to the Heavy

Question

Which of the following domain types is unique to the heavy chain of the polypeptide?
A) V
B) D
C) J
D) C

Accepted Answer

The D (Diversity) domain is unique to the heavy chain of the polypeptide in antibodies. The heavy chain undergoes V(D)J recombination, where the D segment is exclusive to the heavy chain, contributing to the diversity of the antibody repertoire.