The graph below shows how two different enzymes react with a substrate as the temperature increases.
Enzyme A
Enzyme B
20
20
15
Relative Rate of
Enzyme Action
10
Relative Rate of
Enzyme Action
10
5
5
0
0
0 10 20 30 40 50 60 70 80
0 10 20 30 40 50 60 70 80
Temperature (°C)
Temperature (°C)
Based on the results, what conclusion can be drawn about the action of the
enzymes as the temperature increases?
A. Enzyme B stays effective at higher temperatures than enzyme A.
B. Enzyme B is useful for different reactions than enzyme A.
C. Enzyme A is a better catalyst at 70'C than enzyme B.
D. Enzyme A uses up all the substrate faster than enzyme B.