Final answer:
The terms used to describe the structure on the antigen to which an antibody binds specifically are epitope, antigenic determinant, and CDR.
Step-by-step explanation:
The terms used to describe the structure on the antigen to which an antibody binds specifically are:
- Epitope: This is the small region within an antigen where the antibody binds.
- Antigenic determinant: This is another term for epitope, and refers to the specific chemical groups recognized by the antibody.
- CDR (Complementarity Determining Region): This is a region on the antibody that directly interacts with the epitope.
These terms are used to describe the specificity of the antibody-antigen interaction, as each antibody can only bind to a specific epitope on the antigen.