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16 November, 18:20

What are antigens?

A. proteins secreted by virus infected cells that interfere with further infection by viruses

B. molecular markers on cells that identify those cells to the immune system

C. Y shaped proteins found in the blood that cause foreign cells to clump together

D. lipid markers that are released by B cells to immobilize symbionts

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Answers (2)
  1. 16 November, 18:40
    0
    The answer is B
  2. 16 November, 18:42
    0
    I believe A. but not 100% sure
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