Question

To ensure cytotoxic T cell recognizes only Ags presented by MHC I, they carry cell-surface molecule:

Answer 1

Cytotoxic T cells recognize antigens presented by MHC I molecules, which are expressed on the surface of all nucleated cells. This allows them to target and destroy infected cells. Cytotoxic T cells have T cell receptors that specifically recognize antigens presented on MHC I molecules.

Step-by-step explanation:

Cytotoxic T cells recognize antigens presented by Major Histocompatibility Complex I (MHC I) molecules. MHC I molecules are expressed on the surface of all nucleated cells, including infected cells. The antigens presented on MHC I molecules can be self-antigens or antigens from intracellular pathogens, such as viruses. Cytotoxic T cells have T cell receptors (TCRs) that specifically recognize antigens presented on MHC I molecules, allowing them to target and destroy infected cells.