The structural features common to all antibody classes are
A) two pairs of a heavy chain and a light chain which form an antigen binding site.
B) a stem formed of a light chain and a heavy chain.
C) an antigen binding site formed by two light chains.
D) an antigen binding site formed by a single heavy chain.
E) a heavy chain paired with a light chain.

Question

Quizplus · Accepted Answer

Antibodies, or immunoglobulins, are composed of two identical heavy chains and two identical light chains, forming a Y-shaped structure. The antigen-binding site is formed by the variable regions of both the heavy and light chains.

The Structural Features Common to All Antibody Classes Are