Biology CLEP Prep Practice Exam

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Are you gearing up for the Biology CLEP exam? Prepare like a pro with our Biology CLEP Prep Practice Exam!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

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What kind of signal triggers the lymphocyte response to an antigen?

Cytokine
Anaphylaxis
Messenger RNA
Antibody

The correct answer is: Cytokine

The lymphocyte response is triggered by cytokines, signaling proteins that are released by the immune system cells in response to the detection of an antigen. Cytokines help to activate lymphocytes and guide them to the site of infection or injury. Anaphylaxis, a severe allergic reaction, is not a signal to trigger the lymphocyte response but rather a potentially serious allergic response. Messenger RNA is a molecule involved in protein synthesis and is not directly involved in triggering a lymphocyte response. Antibodies are produced by mature B cells in response to an antigen, but they are not a signal that triggers the initial lymphocyte response.