BI-1291
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, the mixture clears in 40 s. At 60 °C, it does not clear at all. Why?
- The enzyme is denatured so the substrate can no longer fit into its active site.
- The enzyme has too little kinetic energy to collide with the substrate.
- The substrate is used up instantly so no change is seen.
- The enzyme concentration becomes higher and stops the reaction.
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