★ Enzymes Quiz
How do enzymes increase the rate of a chemical reaction?
A. By providing additional reactants
B. By lowering the activation energy needed
C. By increasing the concentration of products
D. By breaking down the reactants
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What is the reason for the drop in enzyme activity at temperatures above the optimum?
A. The activation energy increases
B. The substrate concentration decreases
C. The enzymes denature
D. The pH changes
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