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Unformatted text preview: Because the enzyme does not form chemical bonds with the substrate, it remains unchanged. As a result, the enzyme molecule can be reused. Only a small amount of enzyme is needed because they can be used repeatedly. Activation Energy and Enzymes The amount of activation energy that is required is considerably less when enzyme is present. Conditions that Affect Enzymatic Reactions Rate of Reaction Reactions with enzymes are up to 10 billion times faster than those without enzymes. Enzymes typically react with between 1 and 10,000 molecules per second. Fast enzymes catalyze up to 500,000 molecules per second. Substrate concentration, enzyme concentration, Temperature, and pH affect the rate of enzyme reactions....
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