A, because plants consume carbon dioxide and produce oxygen
D) to move molecules across the membrane against a gradient
<u><em>Answer:</em></u>
<em>A cofactor is any non-protein substance required for a protein to be catalytically active. Some cofactors are inorganic, such as the metal atoms zinc, iron, and copper in various oxidation states. Others, such as most vitamins, are organic.</em>
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<u><em>Explanation:</em></u>
<em>*Hope this helped*</em>
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No they do not have defined nucleus