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