BI-1396
Effect of temperature and pH on enzymes
Biology · Secondary 4 · Hard · Effect of temperature and pH on enzymes
In an investigation on enzyme activity, a student measures the time taken for an enzyme to completely break down its substrate at different temperatures. At 37 °C, the reaction is fastest. At 60 °C, no reaction is observed. Which statement best explains the result at 60 °C?
- The enzyme is denatured so the substrate no longer fits the active site
- The enzyme has more kinetic energy so it works faster at 60 °C
- The substrate is denatured so it cannot collide with the enzyme
- The enzyme concentration is lower at 60 °C than at 37 °C
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