BI-1268
Effect of temperature and pH on enzymes
Biology · Secondary 4 · Medium · Effect of temperature and pH on enzymes
An enzyme that digests protein has maximum activity at 30 °C. When the temperature is increased to 50 °C, its activity drops sharply and does not return even when cooled back to 30 °C. Which is the best explanation?
- The enzyme is denatured at 50 °C and its active site is permanently changed.
- The enzyme runs out of substrate at 50 °C but will recover when cooled.
- The enzyme is frozen at 50 °C and stops moving until cooled.
- The enzyme’s optimum temperature has permanently shifted to 10 °C.
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