Review the animation and answer the questions that follow to test your understanding.

1.			Cytotoxic T cells produce
			A)	class II MHCs
			B)	self proteins
			C)	antibodies, which make holes in cell membrane of infected cells
			D)	perforin, which makes holes in cell membrane of infected cells
2.			Infected cells
			A)	display peptide fragments of degraded viral proteins on their cell surface
			B)	have class II MHC antigens on their cell surface
			C)	are not affected by T cells
			D)	lyse T cells
3.			Cytotoxic T cells recognize
			A)	receptors on B cells
			B)	fragments of self proteins of infected cells
			C)	viral antigens and class I MHC
			D)	viral antigens and class II MHC
			E)	all of the above
4.			Cytotoxic T cells produce cytotoxins which cause apoptosis of infected cells.
			A)	True
			B)	False
5.			Self proteins of infected cells are not recognized by cytotoxic T cells.
			A)	True
			B)	False