An enzyme is participating in a general acid-base catalysis reaction with an optimal reaction pH of 6.0. If acid is added to the environment reducing the pH to 3, what is the likely impact to the rate of reaction

A. The rate of the reaction is likely to increase as the proton concentration has decreased.
B. The rate of the reaction is likely to remain consistent as this change in environment will not effect the kinetics.
C. The rate of the reaction is likely to decrease as the pH is out of optimal catalytic range
D. The rate of the reaction is likely to increase as the pH is within the optimal catalytic range

The best answer is "C"

The rate of the reaction is likely to decrease as the pH is out of optimal catalytic range

Explanation:

General acid-base reactions are are affected by the pH changes. An adjustment in pH from the ideal pH range of 6.0, will reduce the overall reaction rate.

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