Question

The CDR3 loops of T-cell receptors (TCRs) contact __.

a) Antigens
b) Antibodies
c) Cytokines
d) MHC molecules

Answer 1

The CDR3 loops of T-cell receptors (TCRs) contact MHC molecules.

Step-by-step explanation:

The CDR3 loops of T-cell receptors (TCRs) contact MHC molecules. TCRs are cell surface receptors found on T cells that play a crucial role in the immune response. When TCRs come into contact with antigens presented by MHC molecules, they initiate an immune response by activating the T cell. Therefore, the correct answer is d) MHC molecules.