How are T cells "introduced" to antigens?
A. T cells bind to and phagocytose antigens.
B. Antibodies immobilize the antigens for T cell recognition and destruction.
C. Antigen-presenting cells link antigenic peptides to MHC proteins to which T cells will attach.
D. T cells wait in the blood until an antigen collides with them and binds to their TCR.
Answer: C. Antigen-presenting cells link antigenic peptides to MHC proteins to which T cells will attach.
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