TCR-receptor on CD8+T cells - recognizes fragments of peptide bound in __ a. CD3 molecule b. CD4 molecule c. MHC 1 molecule d. MHCII molecule

The correct answer is c. MHC 1 molecule.<br /><br />The T-cell receptor (TCR) on CD8+ T cells recognizes and binds to peptide fragments presented by the Major Histocompatibility Complex (MHC) class I molecules on the surface of infected or tumor cells. MHC class I molecules present peptide fragments derived from intracellular proteins, and the recognition of these peptide-MHC class I complexes by CD8+ T cells is crucial for the activation of cytotoxic T cells, which play a key role in the immune response against infected or transformed cells.