BI-189
Effect of temperature and pH on enzymes
Biology · Secondary 3 · Medium · Effect of temperature and pH on enzymes
The graph of an enzyme-catalysed reaction shows that activity is highest at 40°C and drops sharply above 50°C. Which statement explains the decrease above 50°C?
- The enzyme is denatured and its active site changes shape.
- The substrate molecules stop moving.
- The enzyme is used up in the reaction.
- The pH of the solution always becomes acidic.
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