Which One of the Following Statements About Humoral Immune Responses

question 9

Multiple Choice

Which one of the following statements about humoral immune responses is true?

• A)Naive B cells are required for initiation of primary responses and memory B cells are required for initiation of secondary responses.
• B)Antibody responses to bacterial polysaccharide antigens require CD4⁺ helper T cells.
• C)Heavy chain isotype switching typically occurs in response to bacterial polysaccharide antigens.
• D)Affinity maturation does not require helper T cells.
• E)Antibody-secreting cells generated during a humoral immune response live for only a few hours.

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