The specificity of an antibody molecule depends on the structure of which of the following?
A) the constant segments of the light and heavy chains
B) the constant and variable segments of the light and heavy chains
C) the variable segments of the light and heavy chains
D) the variable segments of the light chains only
E) the constant segments of the heavy chains only

Question

Quizplus · Accepted Answer

The specificity of an antibody molecule depends on the variable segments of the light and heavy chains, which form the antigen binding site. The constant segments of the light and heavy chains are responsible for determining the antibody isotype and effector function but do not play a role in antigen recognition. Therefore, option C is the correct choice.

The Specificity of an Antibody Molecule Depends on the Structure