Differences in the B-Cell Receptors of Two Different B Cells

Multiple Choice

Differences in the B-cell receptors of two different B cells are due to ________.

A) mutation in the genes of that B cell, induced by exposure to the antigen
B) the rearrangement of C-region genes in that clone of responsive B cells
C) a switch in the kind of antigen-presenting cell that is involved in the immune response
D) a patient's reaction to the first kind of antibody made by the plasma cells
E) the recombination of variable regions of the light-chain and heavy-chain genes