APFIVE Optimal Temperature and Enzyme Denaturation
Which of the following pieces of evidence best supports the conclusion that enzyme activity increases with temperature up to an optimum and then declines due to denaturation?
| Temperature (°C) | Reaction Rate (units) |
|---|---|
| 25 | 60 |
| 37 | 100 |
| 50 | 30 |
A
The table shows that enzyme activity peaks at 37 °C and then declines sharply at 50 °C, consistent with thermal denaturation.
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 reveals a continuously increasing reaction rate as temperature rises.
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