Question R11 Q17 - MIT Science Bowl 2022

Researchers in the Suess group at MIT are studying the properties of iron sulfur clusters in biology. In biology, 4 iron, 4 sulfur clusters are divided into two groups: ferredoxin-like clusters have an iron(II)/iron(I) redox couple, and HiPIP clusters have an iron(III)/iron(II) redox couple. Which of the following statements is true?

W) Ferredoxin-like clusters are redox active at low potentials, but HiPIP clusters are redox active at high potentials

X) Ferredoxin-like clusters are redox active at high potentials, but HiPIP clusters are redox active at low potentials

Y) Both clusters are redox active at low potentials

Z) Both clusters are redox active at high potentials

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