The variable region of an antibody occurs
A) only on the heavy chains.
B) only on the light chains.
C) on one of the light chains.
D) on all four chains.
E) at the hinge region only.

Question

Quizplus · Accepted Answer

The variable region of an antibody occurs on both the heavy and light chains, meaning it is present on all four chains of the antibody molecule. This region is responsible for the antibody's specificity to its unique antigen.

The Variable Region of an Antibody Occurs