BI-1244
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 activity of amylase. She measures the time taken for starch to be completely broken down at 20°C and 40°C. At 20°C, it takes 6 minutes; at 40°C, it takes 2 minutes. Which conclusion about enzyme activity is correct?
- Amylase is more active at 40°C because it breaks down starch in a shorter time.
- Amylase is less active at 40°C because the temperature is closer to its denaturation point.
- Amylase has the same activity at both temperatures because the same volume of starch is used.
- Amylase is inactive at 20°C because starch is still present after 6 minutes.
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