Q 89

During the secondary response to antigens following a previous initial exposure, A)IgM molecules first appear in the bloodstream, followed by a slow rise in IgG. B)an immediate rise in IgG concentrations occurs. C)the antigen must first activate the appropriate B cells. D)the antibody levels do not peak until one to two weeks after antigen exposure. E)memory B cells do not differentiate into plasma cells.

Multiple Choice