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As electrons progress through the electron transport chain, some of their energy is lost or used to power complexes I-IV. Cytochrome C (cyt-C) is a critical electron carrier within this system. It is continually oxidized and reduced as it is used to pass electrons from one complex to another.

When electrons are passed through the electron transport chain in descending order of energy, complex
Select Option IIIIIIIV
first
Select Option oxidizesreduces
cyt-C. Then complex
Select Option IIIIIIIV
Select Option oxidizesreduces
cyt-C.
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