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Question

Cytochrome oxidase is a/an

A
Exoenzyme
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B
Transmembrane enzyme
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C
Proenzyme
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D
Coenzyme
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Solution

The correct option is D Transmembrane enzyme
Cytochrome oxidase is a membrane-associated enzyme which drives final step in the respiratory electron transfer chain. It is a large transmembrane complex usually found in bacteria and mitochondria of eukaryotes. It receives the electron from other cytochrome and finally transfers it to oxygen to form a water molecule. So, answer B is correct.

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