A Specific GTPase-Activating Protein (GAP) Binds to and Activates

Question

A specific GTPase-activating protein (GAP) binds to and activates:
A) the G-protein.
B) the plasma membrane receptor.
C) adenylyl cyclase.
D) the GTPase activity of the Ras protein.
E) none of the above.

Accepted Answer

The question specifically mentions a GAP (GTPase-activating protein), which is known to activate the GTPase activity of specific GTPases, including Ras. Therefore, the correct answer is D: the GTPase activity of the Ras protein.