The atom within each cytochrome molecule that aids in electron transport is A. carbon.
What is electron transport?
Electron transport can be regarded as the sequential transfer of electrons with the help of the substrate and this is done through a oxidation-reduction reactions.
In a atom within each cytochrome molecule , there is a electron transport which is been done by the atom of carbon, which has proteins having heme, with a central Fe atom .
Therefore, option A is correct.
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