Much of the human digestive process takes place in the stomach and small intestine. Glands secrete enzymes that break down protein chains by chemical reactions. Two important digestive enzymes for proteins are pepsin and trypsin. The
effect of the pH on the activity of these enzymes can be determined by analyzing the data below. Plot the data from the
data tables on the graph below and then analyze the activity of the two enzymes to answer the questions. Use two
different colors for your lines and provide a key. Make sure that your graph has the axes appropriately labeled and has a
descriptive title.
4.0
Table 1: Activity of Digestive Enzymes Pepsin and Trypsin
pH
Activity of Pepsin
рн
% of maximum
0.9
0
1.5
65
5.0
3.0
100
6.5
5.0
20
7.5
5.1
0
9.0
Activity of Trypsin
% of maximum
0
75
100
90
0