The molecular fragment on an antigen molecule that a lymphocyte recognizes and responds to is called a(n)

Question

Quizplus · Accepted Answer

The molecular fragment on an antigen molecule that a lymphocyte recognizes and responds to is called an epitope. It is also commonly known as an antigenic determinant. Option B, hapten, refers to a small molecule that can elicit an immune response only when attached to a larger carrier molecule. Option C, antigen binding site, refers to the small pocket or groove on the surface of an antibody molecule where the antigen fragment binds. Option D, variable region, refers to the region of the antibody molecule that contains the antigen binding site and is highly specific to the antigenic determinant.

The Molecular Fragment on an Antigen Molecule That a Lymphocyte