Which of the Following Statements Best Describes the "Two-Signal Requirement

question 9

Multiple Choice

Which of the following statements best describes the "two-signal requirement" for naive lymphocyte activation?

• A)Lymphocytes must recognize two different antigens to become activated.
• B)Lymphocytes must recognize the same antigen at two sequential times to become activated.
• C)Lymphocytes must recognize antigen and respond to another signal generated by microbial infection to become activated.
• D)Both naive B and naive T lymphocytes must simultaneously recognize antigen for either to be activateD.
• E)When lymphocytes recognize antigen,the antigen receptors must activate two-signal transduction pathways to become activated.

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