Antibodies of the different classes IgM, IgG, IgA, IgD, and IgE differ from each other ________.
A) in the way they are produced
B) in their heavy-chain structure
C) in the type of cell that produces them
D) by the antigenic determinants that they recognize

Question

Quizplus · Accepted Answer

The antibodies of different classes differ from each other in their heavy-chain structure. IgM and IgD have a mu and delta heavy chain, respectively, while IgG, IgA, and IgE have different heavy chains (gamma, alpha, and epsilon, respectively). The way they are produced, the type of cell that produces them, and the antigenic determinants they recognize may vary, but it is the heavy-chain structure that distinguishes them the most.

Antibodies of the Different Classes IgM, IgG, IgA, IgD, and IgE