In the electron transport system present in the inner mitochondrial membrane complexes I and IV are respectively.
A
NADH dehydrogenase and FADH2
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B
FADH2 and NADH dehydrogenase
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C
NADH dehydrogenase and cytochrome oxidase complex
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D
NADH dehydrogenase and ATP synthase
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Solution
The correct option is A NADH dehydrogenase and cytochrome oxidase complex Four major respiratory enzyme complexes of electron transport chain are located in the inner mitochondrial membrane: NADH-CoQ reductase(Complex I) Succinate-COQ reductase (Comples II) CoQH2-cytochrome c reductase (Complex III) Cytochrome c Oxidase (Complex IV) There is a fifth complex called ATP synthase which is involved in ATP synthesis.