![Graph showing activity of amylase changes as the pH changes.](http://static.sciencelearn.org.nz/images/images/000/002/265/full/Enzyme-activity-and-pH20161028-31422-1g97g9d.jpg?1674167909)
The activity of amylase changes as the pH changes. A higher enzyme activity will result in a faster rate of reaction. Other digestive enzymes have a similarly shaped graph but with the peak either as shown or displaced to the left (acidic optimum) or to the right (basic optimum).