BI-1276
Effect of temperature and pH on enzymes
Biology · Secondary 4 · Hard · Effect of temperature and pH on enzymes
In an investigation, a student measures the rate of an enzyme reaction at different temperatures.
At 37 °C the rate is highest. At 60 °C the rate is much lower and does not increase again when cooled back to 37 °C.
Which statement explains this result?
At 37 °C the rate is highest. At 60 °C the rate is much lower and does not increase again when cooled back to 37 °C.
Which statement explains this result?
- The enzyme is denatured at 60 °C so its active site no longer fits the substrate
- The enzyme is used up at 60 °C and cannot be re-made
- The substrate is permanently destroyed at 37 °C
- Cooling reverses all changes so the rate should return to the original value
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