Answer:
Therefore, the correct answer is:Complex I (NADH-ubiquinone oxidoreductase)Complex II (succinate-ubiquinone oxidoreductase)Complex III (ubiquinol-cytochrome c reductase)Complex IV (cytochrome c oxidase)
Step-by-step explanation:
Coenzyme Q (also known as ubiquinone) carries electrons between the stages of the electron transport chain in which it is found. In general, coenzyme Q is found in the following stages:Complex I (NADH-ubiquinone oxidoreductase): Coenzyme Q carries electrons from NADH to complex I.Complex III (ubiquinol-cytochrome c reductase): Coenzyme Q carries electrons from complex II (succinate-ubiquinone oxidoreductase) to complex III.Complex IV (cytochrome c oxidase): Coenzyme Q carries electrons from complex III to complex IV.