This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Physiology
[{'content': 'ABC transpoer ? \nSelect and explain. \nA. P. glycoprotein, B. Membrane sparing, C. Channel, D. Adenylyl cyclase', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is'a' i.e., P. glycoproteinATP-binding cassette transpoers (ABCtranspoers) are integral transmembrane proteins that utilize ATP as an energy source to translocate a variety of substrates across membranes.P-glycoprotein is an ATP-binding cassette (ABC) transpoer and is an impoant factor to limit membrane permeability in several tissues and/or elimination pathways into urine (rend tubles) and bile (liver).", 'role': 'assistant'}]