Activation of a receptor that is coupled by G proteins to adenylyl cyclase
A)May increase the intracellular concentration of cyclic AMP
B)May decrease the intracellular concentration of cyclic AMP
C)May result in stimulation or inhibition of DNA transcription
D)Both may increase the intracellular concentration of cyclic AMP and may decrease the intracellular concentration of cyclic AMP are correct
E)All of the choices are correct

Question

Quizplus · Accepted Answer

Activation of a receptor coupled to adenylyl cyclase via G proteins can either increase or decrease cyclic AMP levels, depending on whether the G protein is stimulatory (Gs) or inhibitory (Gi). Changes in cyclic AMP can affect DNA transcription.

Activation of a Receptor That Is Coupled by G Proteins