Which of the following correctly ranks redox centers found in Complex I from lower to higher potential? A correct answer will contain redox centers which are found in only Complex I and will also rank those redox centers in order of lower to higher reduction potential. A)FMN,Heme b₅₆₀,[2Fe-2S],CoQ B)ubiquinone,[4Fe-4S],[2Fe-2S],FMN C)FMN,[2Fe-2S],[4Fe-4S] D)Heme b₅₆₀,[2Fe-2S],[4Fe-4S],FAD E)FAD,[2Fe-2S],[4Fe-4S],Heme b₅₆₀

Question

Quizplus · Accepted Answer

The redox centers found only in Complex I are FMN and [2Fe-2S]. The [4Fe-4S] center is also found in Complex II and the heme b₅₆₀ and FAD centers are found in Complex III. The correct order of lower to higher reduction potential is FMN < [2Fe-2S] < [4Fe-4S]. Therefore, the correct choice is C, which lists the redox centers in the correct order.

Which of the Following Correctly Ranks Redox Centers Found in Complex