Multiple choice

The electron flow from complex I to complex III occurs via

  1. cytochrome c

  2. ubiquinone

  3. complex II

  4. complex IV

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Ubiquinone is bound to the inner mitochondrial membrane of mitochondria . It is the only enzyme that participates in both the citric acid cycle and the electron transport chain. The electron flow from complex I to complex III occurs via ubiquinone.