B. All antigen receptors produced by a single B or T cell are identical and bind to the same epitope.
Explanation:
Antigen receptors are antibody protein anchored to the B-cell membrane.
They are all identical when the antigen receptors is located on one type of B cell making Binding between the receptor and epitope to occur since its structures are complementary. It's not identical when the antigen receptors is located on different types of B cell
The answer is nucleic acid. Every nucleic acid is composed by a base, a sugar and a phosphate group. And they can form DNA or RNA by combining together.
