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Which statement is correct regarding the mitochondrial electron transport system?

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Ubiquinone is positioned on the outer surface of the inner membrane.

Complex IV (cytochrome c oxidase) contains cytochromes a and $a_{3}$ along with two copper centers.

Lipid namely, cytochrome c, an electron carrier, is embedded within the inner membrane.

Complex II oxidizes NADH.

answer is C.

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Detailed Solution

The metabolic pathway through which the electron passes from one carrier to another is called the electron transport system (ETS) and it is present in the inner mitochondrial membrane.

Oxidation of NADH - complex I/NADH dehydrogenase.

Oxidation of FADH2 - complex II /Succinate dehydrogenase

Reduced ubiquinone/ubiquinol - transfers electrons to complex III /cytochrome bc 1 complex

Reduced cytochrome c - transfers electrons to the Complex IV /cytochrome bc 1 complex.

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