Examine the graph below. The diagram shows a graph with pH on the x-axis and enzyme activity on the y-axis. The graph has three bell curves labeled Pepsin, Amylase, and Trypsin. Pepsin has an optimal pH range of between 2 and 4, with the maximum enzyme activity at a pH of 3. Amylase has an optimal pH range of between 6 and 8, with the maximum enzyme activity at a pH of 7. Trypsin has an optimal pH range of between 7 and 9, with the maximum enzyme activity at a pH of 8. Image © GNU Free Documentation License, Version 1.2, 2011 Creative Commons by SA All enzymes have optimal conditions, where they work best. Pepsin, amylase, and trypsin are three enzymes involved in digestion. Amylase is secreted in the mouth, where the pH is between 6 and 8; pepsin is produced in the stomach, where the pH is between 2 and 4; and trypsin is released into the small intestine, where the pH is between 7 and 9. Part 1: Using what you know about enzymes, why does amylase work best in the mouth and not in the stomach? Part 2: Food moves from the mouth to the stomach, and the enzymes from the mouth move with it. Explain what would happen to the amylase enzyme moving from the mouth's environment into the stomach.