BI-117
Effect of temperature and pH on enzymes
Biology · Secondary 3 · Medium · Effect of temperature and pH on enzymes
In an experiment, the rate of enzyme activity increases as temperature rises from 10 °C to 37 °C, but decreases sharply above 40 °C. Which statement best explains the decrease above 40 °C?
- Substrate molecules stop moving at high temperatures.
- The enzyme becomes denatured and its active site changes shape.
- The enzyme is used up and cannot be reused.
- The pH of the solution always decreases at high temperatures.
Sign in to check your answer and see the hint and the worked explanation. Free on PrepLab High.