The mobile electron carrier of mitochondria membrane is

C y t α_{3}

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FeS

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CoQ

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C y t c_{1}

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Solution

The correct option is C CoQ
Ubiquinone or coenzyme Q is an organic molecule present in the inner mitochondrial membrane which can move freely within the hydrophobic region of mitochondrial membrane by diffusion. Thus, it is known as the mobile electron carrier and thus passes electrons to cytochromes which are arranged in a sequence b-c-a-a3 which finally pass the electrons to molecular oxygen.
Thus, the correct answer is option C.

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