The activator for cytochrome oxidase is?
Correct answer: A. Fe+2
- A. Fe+2
- B. Zn+2
- C. Mg+2
- D. None of these
Explanation
Option A is correct.The activator for cytochrome oxidase is Fe2+. Cytochrome oxidase is an enzyme that is found in the electron transport chain of mitochondria. It is the final enzyme in the electron transport chain, and it catalyzes the reduction of oxygen to water. The cofactor for cytochrome oxidase is heme a3, which is a metal-containing molecule. The iron atom in heme a3 is in the Fe2+ state. This iron atom is the site of oxygen reduction. The Fe2+ state is the most active state of iron for oxygen reduction. When Fe2+ is oxidized to Fe3+, it is less active for oxygen reduction. The Fe2+ cofactor is essential for the activity of cytochrome oxidase. Without the Fe2+ cofactor, cytochrome oxidase would not be able to reduce oxygen to water.
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