Answer:
Enzyme activity is affected.
Step-by-step explanation:
The enzyme reaction rate depends on the optimal surroundings. For example, a higher-than-normal temperature would generally result in the denaturing of the enzyme, rendering the enzyme useless; while a lower-than-normal temperature may result in the decrease of the enzyme activity.
Similarly, a minor pH change would slow the enzyme reaction rate while extreme pH changes would result in enzyme denaturing.
Denaturing means the deformation of the active binding site, rendering the enzyme completely useless.