The Switch of One B Cell from Producing One Class

question 66

Multiple Choice

The switch of one B cell from producing one class of antibody to another class of antibody that is responsive to the same antigen is due to ________.

• A) the rearrangement of V region genes in that clone of responsive B cells
• B) a switch in the kind of antigen-presenting cell that is involved in the immune response
• C) a patient's reaction to the first kind of antibody made by the plasma cells
• D) the rearrangement of immunoglobulin heavy-chain C region DNA

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