Q: Which of the following is true of the major histocompatibility complex (MHC)?
A		Four classes of the major histocompatibility complex exist.
B		T cells do not detect infections through MHC.
C		MHC I acts as a signal for viruses.
D		MHC molecules display protein fragments from a pathogen for recognition by B cells.

Protein Structure and Function | Immune System | Membrane Transport and Signalling |