Which of the following events are listed in the CORRECT order?
A)cAMP activates adenylyl cyclase, which activates protein kinase A
B)protein kinase A phosphorylates adenylyl cyclase, which then synthesizes cAMP from ATP
C)adenylyl cyclase catalyzes the formation of cAMP, which activates protein kinase A

Question

Quizplus · Accepted Answer

The correct sequence is adenylyl cyclase catalyzing the formation of cAMP, which then activates protein kinase A. This is the classic pathway for cyclic AMP signaling. Option A is incorrect because adenylyl cyclase catalyzes the formation of cAMP, and it is cAMP that activates protein kinase A. Option B is also incorrect because protein kinase A does not phosphorylate adenylyl cyclase; instead, adenylyl cyclase activity is modulated by G protein-coupled receptor signaling.

Which of the Following Events Are Listed in the CORRECT