Infected cells
A) display peptide fragments of degraded viral proteins on their cell surface
B) have class II MHC antigens on their cell surface
C) are not affected by T cells
D) lyse T cells

Question

Quizplus · Accepted Answer

Infected cells display peptide fragments of degraded viral proteins on their cell surface as part of their immune response to alert the immune system to the presence of a virus. This allows for recognition and destruction by T cells.

Answer: B 
 Infected cells have class I MHC antigens on their cell surface, which present viral peptides to cytotoxic T cells for destruction. Class II MHC antigens are only present on antigen-presenting cells, which present peptide fragments from extracellular pathogens to helper T cells.

Answer: C 
 This statement is false. Infected cells are recognized by T cells and subsequently destroyed.

Answer: D 
 This statement is false. Infected cells do not lyse T cells, as T cells are responsible for lysing infected cells.

Infected Cells