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An antigen _____. a) is a protein molecule that helps defend the body against disease
b) is a foreign molecule that evokes a specific response by a lymphocyte
c) induces development of white blood cells in the bone marrow
d) is a protein attacked by an invading microorganism
e) could be an invading bacterium

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Answer: Option B) is a foreign molecule that evokes a specific response by a lymphocyte

Explanation:

An antigen is a large, foreign molecule (such as a protein) that stimulates the host organism to secrete lymphocytes and specific antibodies that bind to the foreign molecule, labelling it as foreign and destined for destruction.

Thus, option B is the answer

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