Multiple choice The antigen-binding site of an antibody is referred as conformational epitope linear epitope paratope isotype Reveal answer Fill a bubble to check yourself C Correct answer Explanation The paratope is the part of an antibody which recognises an antigen, the antigen-binding site of an antibody. It is a small region (of 15-22 amino acids) of the antibody's Fv region and contains parts of the antibody's heavy and light chains.