Ig and Ig b. T cells 25. Proliferation of B cells and hypermutation 30. They require macrophage presentation of the antigen to the B cell. They stimulate independent T cells to grow and divide.
MHC genes are highly polymorphic.
Each genes has many alleles 36. You incubate the spleen cells with H2b macrophages that have ingested the LCM virus. You don't get any IL-2 production. However, when you mix these spleen cells with LCM-infected H2b cells, you get lysis. Botha a and b are true d.