Question

which of the following is not true of human mhc proteins?
a they are called hla (human leukocyte antigens).
b they are self - antigens.
c they are involved in anti - body mediated immunity.
d they are found on all of ones body cells.

Explanation:

• Option A: Human MHC proteins are indeed called HLA (human leukocyte antigens), so this is true.
• Option B: MHC proteins act as self - antigens, helping the immune system distinguish self from non - self, so this is true.
• Option C: MHC proteins are mainly involved in cell - mediated immunity (presenting antigens to T - cells), not antibody - mediated (humoral) immunity. Antibody - mediated immunity is more related to B - cells and antibodies. So this statement is not true.
• Option D: MHC class I proteins are found on all nucleated body cells, so this is generally true.

Answer:

C. They are involved in anti - body mediated immunity.