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

1			Viral spikes
			A)	attach non-specifically to host cell receptors
			B)	attach specifically to host cell receptors
			C)	are made of carbohydrate
			D)	are present in all viruses
2			In viral entry by endocytosis
			A)	host plasma membrane surrounds whole virion and forms a vesicle
			B)	host plasma membrane surrounds only viral protein coat and forms a vesicle
			C)	host plasma membrane surrounds only viral nucleic acid and forms a vesicle
			D)	host spikes fuse with host plasma membrane
3			After the virus nucleocapsid is released from the vesicle into the host cell cytoplasm
			A)	the viral nucleic acid is destroyed
			B)	it remains intact
			C)	the capsid protein is removed
			D)	the capsid protein becomes thicker
4			A naked virus fuses with host cell membrane.
			A)	True
			B)	False
5			Viruses with spikes usually enter host cells by endocytosis.
			A)	True
			B)	False