The Major Histocompatibility Complex Is a ________

Multiple Choice

The Major Histocompatibility Complex is a ________.

A) surface protein that functions as a self-marker
B) series of proteins on the surface of a T cell that bind antigen and trigger an intracellular signal
C) series of complement proteins that form the membrane attack complex
D) set of tightly-linked genes that express surface proteins essential for T cell activation