Class II MHC are Found On

Question

Class II MHC are found on
A) the skin.
B) red blood cells.
C) cytoplasmic membranes of nucleated cells.
D) muscle cells.
E) professional antigen-presenting cells.

Accepted Answer

Class II MHC molecules are mainly found on professional antigen-presenting cells such as dendritic cells, macrophages, and B cells, which play a vital role in presenting antigens to T helper cells. They are also found on certain activated T and B lymphocytes. They are not found on the skin, red blood cells, or muscle cells, and only nucleated cells have cytoplasmic membranes.