BI-1365
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-controlled reaction. She measures the time taken for a cloudy mixture to turn clear at different temperatures.
At 20°C: 60 s
At 30°C: 30 s
At 40°C: 15 s
At which temperature is the enzyme working at the highest rate, and why?
At 20°C: 60 s
At 30°C: 30 s
At 40°C: 15 s
At which temperature is the enzyme working at the highest rate, and why?
- 20°C, because the reaction takes the longest time so more product is formed.
- 20°C, because enzymes are denatured at higher temperatures.
- 40°C, because the reaction finishes in the shortest time so the rate is highest.
- 30°C, because it is halfway between 20°C and 40°C.
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