When an antigen is bound to an antibody, it binds to

A. a specific antigen-binding site formed by heavy and light chains.
B. the light immunoglobulin chain only.
C. the heavy immunoglobulin chain only.
D. gamma immunoglobulin only.
E. a hypervariable region of immunoglobulin DNA.


Answer: A

Anatomy & Physiology

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