Question

Which of the following correctly matches the cell type with its function?

1) B cells: suppress the immune response once the foreign antigen has been cleared from the body
2) helper T cells: recognize virus-infected cells
3) regulatory T cells: make antibodies
4) cytotoxic T cells: activated by antigens bound to MHC I

Answer 1

The correct match is option 4, where cytotoxic T cells are activated by antigens bound to MHC I and are responsible for destroying virus-infected cells.

Step-by-step explanation:

The correct match for the cell type with its function is 4) cytotoxic T cells: activated by antigens bound to MHC I. Cytotoxic T cells are indeed activated by the binding of antigens to MHC class I molecules, and their primary function is to destroy virus-infected cells and tumor cells through processes such as apoptosis. Helper T cells facilitate the activation of other immune cells, including B cells and other T cells, but do not recognize virus-infected cells themselves; that function is left to the cytotoxic T cells. Regulatory T cells, also known as suppressor T cells, function to suppress the immune response to prevent autoimmunity and overactivation, not to make antibodies, which is the function of B cells once they differentiate into plasma cells. Lastly, B cells are the antibody-producing cells and do not have a role in suppressing the immune response following clearance of the antigen.