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Cytochrome is

1. Metallo - Flavo protein
2. Fe-containing porphyrin pigment
3. Glycoprotein
4. Lipid

Correct answer: Fe-containing porphyrin pigment

Solution

Cytochromes are proteins that contain a heme prosthetic group, which is an iron-containing porphyrin pigment. This iron center allows them to participate in electron transport reactions.

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