研究所、轉學考(插大)-普通生物學題庫下載題庫

3. A nonfunctional CD4 protein on a helper T cell would result in the helper T cell being unable to_____________.
(A) respond to circulating viral antigens
(B) lyse tumor cells
(C) stimulate a cytotoxic T cell
(D) interact with a class II MHC-antigen complex