Adenylyl Cyclase Has the Opposite Effect of Which of the Following

Question

Adenylyl cyclase has the opposite effect of which of the following?
A)protein kinase
B)protein phosphatase
C)phosphodiesterase
D)phosphorylase
E)GTPase

Accepted Answer

Adenylyl cyclase catalyzes the formation of cyclic AMP (cAMP) from ATP, while phosphodiesterase breaks down cAMP. Therefore, they have opposite effects on the level of intracellular cAMP. The other enzymes listed do not have direct opposing effects to adenylyl cyclase.