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      Question

      Which element is a part of cytochrome

      oxidase?
      A Mg Correct Answer Incorrect Answer
      B Fe Correct Answer Incorrect Answer
      C Mo Correct Answer Incorrect Answer
      D All of these Correct Answer Incorrect Answer

      Solution

      Cytochrome C oxidase (CCO) is composed of 13 protein subunits. It contains three  copper ions , which are necessary for its function. It also contains zinc, magnesium, and iron.

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