Question

Iron porphyrin protein complex occurs in

• A. Cytochrome
• B. Chlorophyll
• C. Phytochrome
• D. Both A and B

Answer 1

The correct option is A Cytochrome

ETS is the last step in respiration in which final oxidation occurs by release of energy. Cytochrome is a component of ETS that acts as electron carrier from high energy to low energy complexes. Structurally, it consists of iron in porphyrin ring that is capable of electron transfer by virtue of its dynamic equilibrium between ferrous, ferric and ferroxo (Fe4+) state.

So the answer is 'Cytochrome'.