BI-17
Effect of temperature and pH on enzymes
Biology · Secondary 3 · Hard · Effect of temperature and pH on enzymes
Pepsin is a protease that works in the stomach. Which statement best describes how a moderate increase in temperature from 20 °C to 37 °C affects the rate of reaction of pepsin?
- The rate decreases because pepsin is denatured immediately.
- The rate stays the same because temperature does not affect pepsin.
- The rate increases because more enzyme–substrate complexes are formed each second.
- The rate becomes zero because substrates no longer fit the active site.
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