An external stimulus causes a specific intracellular response. Which is the most likely order in which signal transducers would work?
A) G protein; cAMP; protein kinase
B) protein kinase; cAMP; G protein
C) cAMP; protein kinase; G protein
D) protein kinase; G protein; cAMP
E) cAMP; G protein; protein kinase

Question

Quizplus · Accepted Answer

The typical order is that a G protein is activated first, which then activates adenylyl cyclase to convert ATP to cAMP, and finally, cAMP activates protein kinase.

An External Stimulus Causes a Specific Intracellular Response