Chemistry, 26.11.2019 03:31 polloAngelo7671
Cytochromes are critical participants in the electron transport chains used in photosynthesis and cellular respiration. how do cytochromes donate and accept electrons?
1) every cytochrome's iron‑containing heme group accepts electrons from oxygen and donates the electrons to the next cytochrome in the chain.
2) the cytochromes donate electrons excited by photons to other cytochromes that accept electrons as replacements for lost electrons.
3) cytochromes donate electrons directly to the energy‑carrier molecules and and accept electrons from less electronegative substances.
4) each cytochrome has an iron‑containing heme group that accepts electrons and then donates the electrons to a more electronegative substance.
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