Viral infection of target cells results in
A)the presentation of viral antigens in class-2 MHC molecules.
B)the activation of cytotoxic T cells when the CD4 coreceptor is occupied.
C)the presentation of viral antigens in class-1 MHC molecules.
D)activation of helper T cells when the CD8 coreceptor is occupieD.

Question

Quizplus · Accepted Answer

Viral infection of target cells leads to the display of viral antigens in class-1 MHC molecules. This is because class-1 MHC molecules are present on all nucleated cells, including target cells. T cells bearing CD8 co-receptors recognize these viral antigens on class-1 MHC molecules and become activated to target the infected cells. Class-2 MHC molecules are mainly present on antigen-presenting cells and are involved in presenting antigens to CD4 co-receptor-bearing T cells, which help in the activation of other immune cells.

Viral Infection of Target Cells Results in