The class of immunoglobulins is determined by:
A) The number of B cells containing the antibody
B) The complexity of the antibody
C) The isotype of the heavy chain
D) The specificity of the variable region

Question

Quizplus · Accepted Answer

The class of immunoglobulins is determined by the isotype of the heavy chain. There are five known classes of heavy chains, each of which determines the class of immunoglobulin: IgM, IgG, IgA, IgD, and IgE. The specificity of the variable region determines the antigenic specificity of the antibody, not the class. The number of B cells containing the antibody or the complexity of the antibody are not factors that determine the class of immunoglobulin.

The Class of Immunoglobulins Is Determined By