Cytochrome is
- metallo flavo protein
- Fe containing porphyrin pigment
- glycoprotein
- lipid.
Answer
(2) Fe containing porphyrin pigment
Solution
As per NCERT, cytochromes (cytochrome b, c, a, a3) are electron carriers of the electron transport system in the inner mitochondrial membrane.
⇒ Each cytochrome is a haem protein: its prosthetic group is a porphyrin ring holding an iron atom that changes between Fe3+ and Fe2+ while carrying electrons.
∴ Cytochrome is an Fe containing porphyrin pigment.
Answer: (2)