medium · Enhanced ACT science
A biologist hypothesizes that the activity of Enzyme X peaks at a neutral pH of 7.0 and decreases as the environment becomes more acidic or basic.
| pH | Enzyme Activity (units/min) |
| :--- | :--- |
| 5.0 | 15 |
| 6.0 | 45 |
| 7.0 | 80 |
| 8.0 | 42 |
| 9.0 | 12 |
Do the results from the table support the biologist's hypothesis?
- No; the hypothesis is refuted because the enzyme remains active at pH 5.0 and pH 9.0 rather than stopping.
- Yes; the results support the hypothesis because the activity at pH 6.0 is higher than the activity at pH 9.0.
- No; the data is inconclusive because the increase in activity between pH 5.0 and 6.0 is too large to be valid.
- Yes; the data shows activity increasing up to pH 7.0 and then declining as the pH continues to increase.
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