Question

Metal present in cytochrome oxidase is

• A. $Cu$
• B. $Fe$
• C. $Mg$
• D. $Ca$

Answer 1

The correct option is A $Cu$

Cytochrome oxidase is an enzyme complex which takes part in the electron transport chain and it is the transmembrane protein present in the inner mitochondrial membrane. It contains copper ions which get oxidized and transfers the electron to O${}_2$.

So, the correct answer is option A.