Why is bound GTP considered a "clock"?
A) It behaves in specific time intervals.
B) GTP is exchanged for GDP after binding to adenylate cyclase.
C) The Gɑ receptors have intrinsic GTPase activity, hydrolyzing GTP to GDP and Pi.
D) All of the above.
E) None of the above.

Question

Quizplus · Accepted Answer

Bound GTP is considered a "clock" because Gɑ receptors have intrinsic GTPase activity, which hydrolyzes GTP to GDP and Pi. This enzymatic activity occurs in a specific time interval, creating a clock-like mechanism. Choices A and B are incorrect because they do not accurately describe why bound GTP is considered a "clock."

Why Is Bound GTP Considered a "Clock