Buffer solution resists changes in pH, helping to keep the pH constant throughout the investigation. The syringe will give a more accurate measurement ... on the rate of enzyme reaction.

As with many chemical reactions ... enzyme becomes denatured and can no longer function. This is shown in the graph below. In the graph above, as the pH increases so does the rate of enzyme activity.

Enzymes are primarily proteins, although some RNA molecules called ribozymes also exhibit enzymatic activity. Enzymes are biological catalysts that lower the activation energy of chemical reactions, ...