Arrange the following electron carriers in the electron transport chain, based on their standard reduction potentials.Cytochroms a3(Fe3+) + e? ? Cytochrome a3 (Fe2+)   Eo (volts) = 0.35Ubiquinone + 2H+ + 2e? ? Ubiquinone H2                  Eo (volts) = 0.10Cytochrome a (Fe3+) + e? ? Cytochrome a (Fe2+)      Eo (volts) = 0.29Cytochrome c (Fe3+) + e? ? Cytochrome c (Fe2+)      Eo (volts) = 0.25

A. cytochrome c - ubiquinone ? cytochrome a ? cytochrome a3
B. cytochrome a3 ? cytochrome a ? cytochrome c ? ubiquinone
C. ubiquinone ? cytochrome a ? cytochrome a3 ? cytochrome c
D. ubiquinone ? cytochrome c ?  cytochrome a ?  cytochrome a3


Answer: D

Biology & Microbiology

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