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NADH and FADH2 is associated with respectively ____________(a) Complexes I and complex II(b) Complexes II and complex III(c) Complexes I and complex III(d) Complexes III and complex IVI have been asked this question during an internship interview.My enquiry is from Mitochondrial Structure and Function topic in section Mitochondrial Structure and Function of Cell Biology |
Answer» RIGHT choice is (a) COMPLEXES I and complex II To elaborate: When NADH is the ELECTRON donor, electrons enter the RESPIRATORY chain via complex I, which transfers electrons to Ubiquinone. FADH2 remains covalently attached to succinate dehydrogenase, a component of complex II. When FADH2 is donor, electron is directly passed to Ubiquinone. |
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