Question

CD4+ T cells recognize

A) CD8+ markers
B) IgM
C) MHC Class I peptides
D) MHC Class II peptides

Answer 1

CD4+ T cells recognize MHC Class II peptides on antigen-presenting cells such as macrophages, dendritic cells, and B cells. The CD4 molecule on the surface of the T cell binds to the MHC Class II molecule, allowing the T cell to interact with the antigen-presenting cell and initiate an immune response.

Step-by-step explanation:

CD4+ T cells recognize MHC Class II peptides.

T cells are a type of white blood cell that play a crucial role in the immune response. CD4+ T cells, also known as helper T cells, recognize antigens presented in association with MHC Class II molecules. These MHC Class II molecules are found on antigen-presenting cells such as macrophages, dendritic cells, and B cells. The CD4 molecule on the surface of the helper T cell binds to the MHC Class II molecule, allowing the T cell to interact with the antigen-presenting cell and initiate an immune response.