T cells bind with HLA self-antigens only when they are in association with a foreign antigen, and are responsible for cell-mediated immunity. Additionally, T cells can also bind with free extracellular antigen, making both options (a) and (b) partially correct. Therefore, the best answer is both (b) and (c), or (E).

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T Cells

Question 81

Multiple Choice

T cells

A) bind with free extracellular antigen.
B) bind with HLA self-antigens only when they are in association with a foreign antigen.
C) are responsible for cell-mediated immunity.
D) both (a) and (c) above.
E) both (b) and (c) above.

Correct Answer: