Which of the following is the role of coenzyme Q (ubiquinone) in the respiratory chain?: (A) It links flavoproteins to cytochrome b, the cytochrome of lowest redox potential, (B) It links NAD-dependerit dehydrogenases to cytochrome b, (C) It links each of the cytochromes in the respiratory chain to one another, (D) It is the first step in the respiratory chain
Answer is A. Coenzyme Q collects reducing equivalents from flavoprotein complexes and passes them along the chain to the cytochromes. Reducing equivalents from a number of substrates are passed through coenzyme Q in the respiratory chain.