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: Biochemistry
[{'content': 'Among the following, the maximum redox potential is for: \nSelect and explain. \nA. NADH/NAD, B. Succinate/Fumarate, C. Ubiquinone, D. Fe+3/ Fe+2', 'role': 'user'}, {'content': 'Answer: D \nExplanation: D i.e. Fe2+ Because electrons tend to flow spontaneously from carries of lower redox potential (Edeg) to carries of higher redox potential. The order (sequence) of electron carriers in ETC of mitochondria (and so the increasing order of redox potential) is Substrate --> NADP+ /NADPH --> NADVNADH --> NADH dehydrogenase (FMN) / NADH dehydrogenase (FMNH2) --> FAD/FADH2 --> Ubiquinone or Coenzyme Q --> Fe3+ / Fee* in cytochromes b --> C --> a -+ a3 --> 02', 'role': 'assistant'}]