Which may NOT be a mode of action of an antibody?
Correct answer: C. Secretion of cytokines
- A. Neutralizing an antigen
- B. Precipitating an antigen
- C. Secretion of cytokines
- D. Enhancing phagocytosis
Explanation
Antibodies primarily work by neutralizing antigens, precipitating antigens, and enhancing phagocytosis. While antibodies play a role in immune signaling, the direct secretion of cytokines is not a typical mode of action of antibodies.
This question appeared on the NUMS 2023 paper, which you can sit online with every answer explained.
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Specific defense mechanisms provide targeted immunity through B lymphocytes, T lymphocytes, antibodies and memory cells that recognize particular antigens. Questions cover humoral and cell mediated responses, clonal selection, primary and secondary immune responses, vaccination and passive immunity, while distinguishing adaptive defenses from the immediate, non specific innate response.
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