APFIVE Optimal Temperature and Enzyme Denaturation
The table shows the rate of an enzyme-catalyzed reaction at different temperatures. Which statement best explains how these data support the concept that enzyme activity has an optimal temperature and is reduced at higher temperatures by denaturation?
| Temperature (°C) | Reaction Rate (units) |
|---|---|
| 25 | 60 |
| 37 | 100 |
| 50 | 30 |
A
The table reveals a continuously increasing reaction rate as temperature rises.
B
The table indicates that enzyme activity remains constant across different temperatures.
C
The table shows that enzyme activity decreases even at lower temperatures, which is inconsistent with optimal activity.
D
The table shows that enzyme activity peaks at 37 °C and then declines sharply at 50 °C, consistent with thermal denaturation.
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