All are Single-Electron Carriers EXCEPT

Question

All are single-electron carriers EXCEPT:
A) UQH2.
B) Cyt bL.
C) Cyt bH.
D) Rieske protein Fe−S clusters.
E) Cyt c1.

Accepted Answer

UQH₂ (ubiquinone) is a two-electron carrier. Answer: B, C, D, E Cyt b_L (cytochrome b), Cyt b_H (another form of cytochrome b), Rieske protein Fe−S clusters, and Cyt c₁ (cytochrome c) are all single-electron carriers.