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1	Which cell type specifically targets virally infected cells?
	A)	B cells
	B)	T helper cells
	C)	T killer cells
	D)	all of the above
2	T killer cells appear to destroy their virally infected targets by:
	A)	secreting cytokines
	B)	secreting antibodies
	C)	ingesting the membranes of infected cells
	D)	a and c
	E)	all of the above
3	The scientists were able to follow the ingested pieces of virally infected cells into the T killer cells by using:
	A)	temperature differences
	B)	pH differences
	C)	green fluorescent protein
	D)	none of the above
4	Based upon their results, the scientists suggest that:
	A)	the T killer cells may be using the fragments of ingested virally infected cells for nutrients
	B)	the T killer cells can ingest any cell type that is virally infected
	C)	the efficiency of T killer cell responses to pathogens or vaccines can be measured by tracking the ingested pieces of virally infected cells
	D)	a and c
	E)	all of the above