BI-86
Effect of temperature and pH on enzymes
Biology · Secondary 3 · Medium · Effect of temperature and pH on enzymes
The graph shows how the rate of an enzyme‑catalysed reaction changes with temperature. At 37 °C the rate is highest. What happens to the enzyme when the temperature is increased to 70 °C?
- It becomes more active and the rate keeps increasing
- It is denatured and its active site changes shape
- It freezes and stops moving
- It is used up and disappears from the reaction
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