BI-1207
Effect of temperature and pH on enzymes
Biology · Secondary 4 · Medium · Effect of temperature and pH on enzymes
In an experiment, catalase is used to break down hydrogen peroxide. At 40°C the reaction is fast. When the temperature is increased to 70°C, almost no oxygen is produced. What is the best explanation?
- The enzyme is denatured at 70°C so the substrate cannot bind.
- The substrate is used up completely at 70°C.
- The enzyme becomes more active and finishes the reaction instantly.
- The hydrogen peroxide freezes at 70°C and cannot react.
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