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Cytotoxic T cells are A - VCE - SSCE Biology - Question 19 - 2013 - Paper 1
Question 19
Cytotoxic T cells are A. antibodies. B. able to kill virus-infected cells. C. part of the humoral response. D. part of the second line of the immune defence.
Worked Solution & Example Answer:Cytotoxic T cells are A - VCE - SSCE Biology - Question 19 - 2013 - Paper 1
Step 1
B. able to kill virus-infected cells.
Answer
Cytotoxic T cells, also known as CD8+ T cells, play an essential role in the immune response. Their primary function is to directly kill infected cells, particularly those infected by viruses. They achieve this by recognizing specific antigens presented on the surface of infected cells, leading to the destruction of these cells. Therefore, option B is the correct answer.