Enzyme activity
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The graph below shows the rate of enzyme activity in relation to pH for two enzymes, pepsin and trypsin. Pepsin and Trypsin are both enzymes that help in digestion. They act in series. Pepsin breaks some bonds in very large molecules while Trypsin acts on the fragments produced by the action of pepsin, breaking them into even smaller units. Use the graph to answer the next three questions.
A.
The graph below shows the rate of enzyme activity in relation to pH for two enzymes, pepsin and trypsin. Pepsin and Trypsin are both enzymes that help in digestion. They act in series. Pepsin breaks some bonds in very large molecules while Trypsin acts on the fragments produced by the action of pepsin, breaking them into even smaller units. Use the graph to answer the next three questions.
The liquid in the stomach has a pH of about 2. Which enzyme(s) would be active in the stomach?
The liquid in the stomach has a pH of about 2. Which enzyme(s) would be active in the stomach?
- Only pepsin would be active in the stomach because of the low pH.
- Pepsin and Trypsin would both be active in the stomach because the work in sequence
- Trypsin would be active because it would work to lower the pH of the stomach.
- Neither one would be active in the stomach because the pH is too low.
B.
At what pH range does pepsin have the highest relative activity?
- below 9
- between 4 and 5
- between 2 and 4
- above 3
C.
At what pH are both pepsin and trypsin active at the same time?
- Pepsin and trypsin are both active at a neutral pH.
- There is no pH where pepsin and trypsin are both active.
- Pepsin and trypsin are both active when the pH is between 2 and 6.
- Pepsin and trypsin are both active when the pH is between 4 and 5.