Question

What do B cells make when they recognize antigens?

Answer 1

B cells start to proliferate in response to an invasion by antigens. They produce a generation of plasma cells which actively secrete antibodies in body fluid.

Explanation:

Antibodies are globulin type proteins. Each B cell can generate only a single type of antibody against a particular foreign antigen, to which it was first exposed.

Also read this answer.

Antibody molecules are Y shaped, each molecule made of four polypeptide chains. The forked end of the molecule carries specific antigen binding site.

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Answer 2

They differentiate into plasma cells,which produce large amounts of y shaped proteins called antibodies .