Cytochromes are_____________?
Correct answer: D. Iron-porphyrin proteinsConsult A Nutritionist
- A. Pyridine nucleotides
- B. Riboflavin containing nucleotides
- C. Metal containing flavoproteins
- D. Iron-porphyrin proteinsConsult A Nutritionist
Explanation
Cytochromes are electron-transfer proteins containing a heme group, so they are iron-porphyrin proteins. Their heme iron undergoes reversible Fe2+ and Fe3+ oxidation during electron transport.
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