Which of the prosthetic groups listed can accept or donate either one or two electrons due to the stability of the semiquinone state?
A)cytochrome c
B)NADH
C)CoQ
D)[2Fe-2S]
E)Rieske center

Question

Quizplus · Accepted Answer

CoQ (coenzyme Q) is the only prosthetic group listed that can accept or donate either one or two electrons due to the stability of the semiquinone state. This property makes it a versatile electron carrier in the electron transport chain. Cytochrome c and the iron-sulfur centers listed (2Fe-2S and Rieske center) can only accept or donate one electron at a time, while NADH can only donate two electrons at a time.

Which of the Prosthetic Groups Listed Can Accept or Donate