Enzyme activity graphs
Enzyme activity graphs
1. The table below shows the volume of oxygen gas produced during an investigation on the activity of catalase from potato tissue on hydrogen peroxide.
|Time from adding potato tissue (s) |Volume of oxygen gas (cm3) |
|0 |0 |
|20 |4.3 |
|40 |6.5 |
|60 |7.7 |
|80 |8.4 |
|100 |8.8 |
|120 |9.1 |
|140 |9.3 |
a. Draw a graph of the data and use it to find the rates of the reaction 10, 80 and 140 seconds after the start.
b. Describe the pattern of the graph.
c. Explain the changes to the rate of reaction during the investigation.
2. A student carried out an investigation on the effect of increasing catalase concentration on the rate of the reaction. Draw a sketch graph showing the pattern you would expect in the results.
3. Another student carried out an investigation on the effect of increasing the concentration of hydrogen peroxide on the rate of the reaction.
a. Draw a sketch graph showing the pattern you would expect in the results.
b. Add a second line to the graph showing the effect of adding a competitive inhibitor to the catalase, hydrogen peroxide mixture. Label the line.
c. Add a third line to the graph showing the effect of adding a non-competitive inhibitor to the catalase, hydrogen peroxide mixture. Label the line.
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