This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'If there is a Gs alpha subunit gain-of function mutation, this results in \nSelect and explain. \nA. Decreased cAMP, B. Decreased IP, C. Increassed GTPase activity, D. Increased cAMP', 'role': 'user'}, {'content': 'Answer: D \nExplanation: The Gs alpha subunit (Gas, Gsa) is a subunit of the heterotrimeric G protein Gs that stimulates the cAMP-dependent pathway by activating adenylyl cyclase. Gsa is a GTPase that functions as a cellular signaling protein Ref-Harper 28/e p447', 'role': 'assistant'}]