Final answer:
pH significantly affects enzyme-controlled reactions by influencing enzyme structure and function.
Explanation:
pH plays a crucial role in influencing the rates of enzyme-controlled chemical reactions. Enzymes have an optimal pH at which they function most efficiently, known as the optimum pH. Deviations from this optimal pH can disrupt the enzyme's structure and function, impacting the reaction rates. For instance, if the pH deviates significantly from the optimal range, it can lead to denaturation of the enzyme, rendering it inactive.
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