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18 December, 18:23

Which of the following statements describes how antibody-binding brings about the removal of antigens? A. Antibodies directly lyse cells expressing foreign antigen, thus removing the antigen. B. Antibodies tag antigens for destruction, either via phagocytes or via complement activation. C. Antibodies directly hydrolyze antigens, destroying them. D. Antibodies bind to antigens and hasten their removal through the kidneys.

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  1. 18 December, 22:01
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    B. Antibodies tag antigens for destruction, either via phagocytes or via complement activation.

    Explanation:

    Antigens are proteins found at the surface of pathogens and causes diseases. Antibodies have Y-shaped that fights off the antigen.

    As the antigen enters, the body produces antibodies against the particular antigen. Lymphocyte (white blood cell) recognises the foreign molecules called antigen and produces antibodies. Each antibody has unique binding site for specific antigen like lock and key.

    The antibodies then binds to the antigen and destroy the antigen via phagocytes or via complement activation.
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