Which of the following is complex V of the ETS of inner mitochondrial membrane?

NADH dehydrogenase

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Cytochrome c oxidase

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Ubiquinone

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Succinate dehydrogenase

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ATP synthase

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Solution

The correct option is C ATP synthase
Complex V of electron transport chain is ATP synthase. The $F_{O}$ component of ATP synthase acts as an ion channel that provides for a proton flux back into the mitochondrial matrix. This reflux releases free energy produced during the generation of the oxidized forms of the electron carriers ( $N A D^{+}$ and Q). The free energy is used to drive ATP synthesis, catalyzed by the $F_{1}$ component of the complex.

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