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Which of the following enzymes serve as catalysts in metabolism? I. amylase II. lactase III. pepsin IV. polymerase

User Thefroatgt
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Amylase, Lactase and Pepsin all serve as catalysts in metabolism. A catalyst is a chemical that increases the rate of a chemical reaction without being changed by the reaction itself. Enzymes are catalytic proteins and they are only found in living organisms as part of their life processes. 
User Daniel Watkins
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