Which of the following is not present in the active site of alcohol dehydrogenase? A) Zn⁺⁺ B) Histidine C) Cysteine D) NAD⁺ E) Proline

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Alcohol dehydrogenase is an enzyme that catalyzes the oxidation of alcohols. Its active site contains a zinc ion (Zn2+), which is crucial for its catalytic activity, and amino acids such as histidine and cysteine that play important roles in the enzyme's function. NAD+ is a coenzyme involved in the redox reaction facilitated by alcohol dehydrogenase. Proline, however, is not directly involved in the active site of alcohol dehydrogenase.

Which of the Following Is Not Present in the Active