BI-1317
Effect of temperature and pH on enzymes
Biology · Secondary 4 · Medium · Effect of temperature and pH on enzymes
A student investigates the effect of temperature on an enzyme. At 37 °C the rate is highest. At 70 °C the rate is very low and does not increase when cooled back to 37 °C. What is the best explanation?
- The enzyme is denatured at 70 °C and cannot regain its shape when cooled
- The substrate is used up at 70 °C but reforms when cooled
- The enzyme becomes inactive at 70 °C but fully recovers when cooled
- The pH of the solution permanently changes at 70 °C
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