Cytochrome is
(a) metallo - flavo protein
(b) Fe-containing porphyrin pigment
(c) glycoprotein
(d) lipid
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Answer:
c) glycoprotein
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(b) Fe-containing porphyrin pigment
Explanation:
Cytochrome is Fe-containing porphyrin pigment. It is composed of protein, iron and porphyrin ring. Cytochrome functions as an enzyme in the respiratory chain. So, these are electron transferring proteins often regarded as enzymes. Unlike hemoglobin the metal atom in the porphyrin ring must change it's valency for the molecule to function. Cytochromes are basically located in inner mitochondrial membranes and also in thylakoids of chloroplasts.
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