Helper T (TH) cells recognize antigens when they are bound to a(n)
A) hapten.
B) immunoglobulin.
C) natural killer cell.
D) major histocompatibility complex (MHC) protein.
E) basophil.
Answer: D) Major histocompatibility complex protein (MHC)
A) hapten.
B) immunoglobulin.
C) natural killer cell.
D) major histocompatibility complex (MHC) protein.
E) basophil.
Answer: D) Major histocompatibility complex protein (MHC)