BI-9
Effect of temperature and pH on enzymes
Biology · Secondary 3 · Hard · Effect of temperature and pH on enzymes
A student investigates how temperature affects the rate of an enzyme reaction. She measures the volume of oxygen released per minute at different temperatures. At 37°C the rate is highest. At 60°C, almost no oxygen is released. Which statement best explains the low rate at 60°C?
- The substrate has completely used up the enzyme.
- The enzyme has been denatured and its active site changed shape.
- The enzyme molecules have all been converted to products.
- The substrate concentration is too high for the enzyme to work.
Sign in to check your answer and see the hint and the worked explanation. Free on PrepLab High.