View the animation below, then complete the quiz to test your knowledge of the concept.

1	The second messenger cAMP is synthesized by the enzyme
	A)	adenylyl cyclase.
	B)	cAMP phoshodiesterase.
	C)	ATPase.
	D)	ligase.
	E)	phosphorylase.
2	The binding of epinephrine to its receptor activates a(n)
	A)	A protein.
	B)	D protein.
	C)	G protein.
	D)	K protein.
	E)	M protein.
3	The enzyme α-kinase adds ________ to proteins.
	A)	acetates
	B)	benzoats
	C)	carbonates
	D)	phosphates
	E)	hydroxyls
4	Epinephrine has to cross the cell membrane to bind to its receptor in the cytoplasm.
	A)	True
	B)	False
5	The second messenger cAMP is made from ADP.
	A)	True
	B)	False