BI-1417
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 enzyme activity. At 37°C the reaction rate is highest. At 60°C the rate is much lower and does not increase when cooled back to 37°C. What is the best explanation?
- The enzyme is denatured at 60°C and cannot regain its shape on cooling.
- The substrate is permanently used up at 60°C.
- The enzyme becomes dormant at 60°C and needs more time to reactivate.
- The pH of the solution must have decreased at 60°C.
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