Mitochondrial genes code for 13 proteins, 2 rRNAs, and tRNAs. For which multisubunit protein do these genes encode the most proteins?

Question

Quizplus · Accepted Answer

The 13 proteins encoded by mitochondrial genes are all subunits of the oxidative phosphorylation complexes, which generate ATP from the electron transport chain. Of these, the NADH-ubiquinone oxidoreductase (also known as Complex I) is the largest multisubunit protein, with 45 different subunits, compared to 28 for ATP synthase, 11 for cytochrome c reductase, 4 for succinate dehydrogenase, and 10 for ubiquinol-cytochrome c oxidoreductase. Therefore, choice C is the best answer.

Mitochondrial Genes Code for 13 Proteins, 2 RRNAs, and TRNAs