Class II MHC proteins are present in the plasma membrane only
A)when plasma cells are releasing antibodies.
B)in antigen-presenting cells and lymphocytes.
C)when cytotoxic T cells are inhibited.
D)when NK cells are activated.
E)during infections.

Question

Quizplus · Accepted Answer

Class II MHC proteins are primarily found on antigen-presenting cells (such as dendritic cells, macrophages, and B cells) and lymphocytes. They present antigens to CD4+ T cells, which play a crucial role in the adaptive immune response. Class II MHC proteins are not present during antibody release, cytotoxic T cell inhibition, or NK cell activation, although they may be upregulated during infections.

Class II MHC Proteins Are Present in the Plasma Membrane