GTP is essential in the hormone mediated production of cAMP. Its role is to
A) stimulate the activity of aspartate transcarbamoylase.
B) increase the cellular level of ATP by serving as a substrate in the synthesis of ATP.
C) bind to the G-protein forming a complex which is necessary for the activation of adenylate cyclase.
D) bind to EF-tu forming a complex necessary for the insertion of ATP into the A-site.

Question

Quizplus · Accepted Answer

GTP binds to the G-protein forming a complex which is necessary for the activation of adenylate cyclase. This leads to the hormone-mediated production of cAMP. Option A is incorrect as aspartate transcarbamoylase is not involved in hormone-mediated production of cAMP. Option B is incorrect as GTP does not directly contribute to the synthesis of ATP. Option D is incorrect as EF-tu is involved in protein synthesis and not hormone-mediated production of cAMP.

GTP Is Essential in the Hormone Mediated Production of CAMP