T-Cell Help of B Cells Will Be Impaired If the T

question 9

Multiple Choice

T-cell help of B cells will be impaired if the T cells lack CD28 because

• A)CD28 is needed to activate class switching by turning on AICD.
• B)CD28 is needed to interact with CD40 on the B cell.
• C)CD28 is needed to signal through the B-cell receptor.
• D)CD28 is needed to signal through the T-cell receptor.
• E)None of the answers are correct.

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