BI-1394
Effect of temperature and pH on enzymes
Biology · Secondary 4 · Hard · Effect of temperature and pH on enzymes
A student investigates the effect of temperature on the rate of an enzyme reaction. She measures the time taken for a cloudy mixture to become clear at different temperatures. At 37 °C, it takes 40 s. At 47 °C, it takes 120 s. What is the most likely reason for the longer time at 47 °C?
- The enzyme is completely inactive at 37 °C
- The enzyme is denatured more at 47 °C, so the reaction is slower
- The substrate concentration is higher at 47 °C
- The enzyme concentration doubles at 47 °C
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