This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory chain, Subject name: Biochemistry
[{'content': 'Least impoant in final pathway of Electron Chain Reaction is \nSelect and explain. \nA. Ph, B. Temperature (morning), C. Enzyme concentration, D. Substrate concentration', 'role': 'user'}, {'content': 'Answer: C \nExplanation: The electrons are passed through a series of redox reactions, with a small amount of free energy used at three points to transpo hydrogen ions across a membrane. This process contributes to the gradient used in chemiosmosis. ... The endproducts of the electron transpo chain are water and ATP.', 'role': 'assistant'}]