Determine which complex of the electron transport chain (respiratory chain) each phrase describes. (coenzyme q is also called ubiquinone or ubiquinol, depending on whether it is in oxidized or reduced form.)

complex i:

complex ii:

complex iii:

complex iv:

here are the choices that need to be put in the correct complex:

1) nadh-ubiquinone(nadh-coenzyme q oxidoreductase)

2) coenzyme q-cytochrome c oxidoreductase

3)electron transfer from succinate to ubiquinone (coenzyme q)

4) electron transfer from cytochrome c to o2

5) succinate-coenzyme q oxidoreductase (succinate dehydrogenase)

6) cytochrome c oxidase

7) electron transfer from ubiquinol (qh2) to cytochrom c

8) electron transfer from nadh to ubiquinone (coenzyme q)