The part of the antibody that combines with the antigen is the:
A) variable region.
B) constant region.
C) carbohydrate chain.
D) complement-binding site.

Question

Quizplus · Accepted Answer

The variable region of the antibody is the part that combines with the antigen. It is responsible for the specificity of the antibody's binding. The constant region, on the other hand, determines the antibody's effector functions and structure. The carbohydrate chain is a component of the antibody's structure and plays a role in its stability and solubility. The complement-binding site is a part of the antibody that allows it to interact with complement proteins, leading to activation of the complement system.

The Part of the Antibody That Combines with the Antigen