Answer: the Major histocompatibility complex (MHC) is important in a T cell's ability to;
Identify specific bacterial pathogens.
Identify specific viruses
And recognise specific parasitic pathogens.
Explanation:
MHC is a complex of highly polymorphic genes in the body. They code for a large family of cell surface glycoproteins that bind peptide fragments of foreign proteins and present them to T cell's to induce an immune response.