Q.

The two mobile electron carriers in the mitochondrial electron transport system are

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a

Plastoquinone and plastocyanin

b

Ubiquinone and cytochrome c

c

Ubiquinone and plastoquinone

d

Cyt a and Cyt a3

answer is C.

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Detailed Solution

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Ubiquinone ,is a mobile electron carrier located within the inner membrane of mitochondria.It receives  reducing equivalents from complex I - NADH Dehydrogenase and  also  via FADH2 (complex II).

 Cytochrome C is a  small carrier protein attached to outer surface of inner mitochondrial membrane, it receive electrons from complex III and transfers them to complex IV .

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The two mobile electron carriers in the mitochondrial electron transport system are