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
Which of the following is not true regarding ETC 
Select and explain. 
A. Occurs in mitochondria, B. Generates ATP, C. No role of inorganic phosphate, D. Involves transpo of reducing equivalent
C: No role of inorganic phosphate
Answer: C: No role of inorganic phosphate 
Explanation: Electron transpo chain Site of occurrence - Mitochondria Components of ETCProsthetic group Features Complex I NADH dehydrogenase / NADH Co-Q reductase / NADH Ubiquinone FMN , FeSEnergy - 12 Kcal/molTo pump 4 protons out of mitochondria into inter membranous spaceComplex IISuccinate dehydrogenase / Succinate Q reductaseFAD , FeSNot a proton pump as energy is liberated Coenzyme Q / Ubiquinone Q Non protein member of ETC For transferring to complex III it accepts hydrogen atoms from 1.FMNH2 produced in complex I2.FADH2 produced in complex II3.FADH2 produced in beta oxidation by acyl CoA dehydrogenase & glycerol 3 phosphate dehydrogenase Complex IIICytochrome bC1 complex / Ubiquinone cytochrome C oxidoreductase / Cytochrome reductase FeS , Heme Energy - 10 Kcal/molTo pump 4 protons out of mitochondria into inter membranous spaceCytochrome C Soluble carrier protein of intermembranous space Complex IV Cytochrome C oxidase / Cytochrome oxidase 2 Heme , 2 Copper ions of CuA , CuBTo pump 2 protons out of mitochondria into inter membranous spaceHarper's illustrated Biochemistry , 30th ed , page 131