This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolism of nucleic acids, Subject name: Biochemistry
[{'content': 'True about G-protein receptor complex \nSelect and explain. \nA. It interacts transmembrane domain, B. GTP to GDP, C. Adenyl cyclase activation leads to increased cAMP, D. GPCR has no phosphorylation propey', 'role': 'user'}, {'content': 'Answer: A \nExplanation: G protein-coupled receptors (GPCRs) which are also known as seven-transmembrane domain receptors, 7TM receptors, heptahelical receptors, serpentine receptor, and G protein-linked receptors (GPLR), constitute a large protein family of receptors, that sense molecules outside the cell and activate inside signal transduction pathways and, ultimately, cellular responses.Coupling with G proteins, they are called seven-transmembrane receptors because they pass through the cell membrane seven times.', 'role': 'assistant'}]