An area on an antigen molecule to which an antibody molecule binds is called:
A) Fc fragment
B) Fab fragment
C) Fab and Fc fragment
D) epitope or antigenic determinant

Question

Quizplus · Accepted Answer

Epitope or antigenic determinant refers to the specific region on the cognate antigen that is recognized by an antibody molecule or a T cell receptor. Fc and Fab fragments are regions of an antibody molecule, with the Fab fragment being responsible for antigen recognition and binding, while Fc fragment mediates effector functions through interactions with receptors on immune cells. Therefore, the correct answer is D, as the epitope or antigenic determinant is the specific site on the antigen where the Fab fragment of an antibody binds.

An Area on an Antigen Molecule to Which an Antibody