Cytotoxic T cells ________.
A. are the only T cells that can directly attack and kill other cells
B. require the double recognition signal of I MHC plus II MHC on the target cell in order to function
C. function mainly to stimulate the proliferation of other T cell populations
D. self-destruct once the antigen has been neutralized
Answer:A
Cytotoxic T cells ________.
A. are the only T cells that can directly attack and kill other cells B. require the double recognition signal of I MHC plus II MHC on the target cell in order to function C. function mainly to stimulate the proliferation of other T cell populations D. self-destruct once the antigen has been neutralized