Discussion
A cell which defends against body cells in which viruses are reproducing is
Answer: B
Correct answer: Cytotoxic T cell
A cytotoxic T cell recognises viral peptides displayed on the infected cell’s MHC class I molecules and kills it - by perforin and granzymes, or by triggering apoptosis - before the virus inside can finish replicating. Suppressor (regulatory) T cells damp responses down instead; exotoxins and endotoxins are bacterial poisons, not cells.
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