1.

The antibiotic penicillin is a small molecule that does not induce antibody formation. However, penicillin binds to serum proteins and forms a complex that in some people induces antibody formation resulting in an allergic reaction. Penicillin is therefore

A. an antigen
B. a hapten
C. an immunogen
D. both an antigen and a hapten
Answer» E.


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