The graph below illustrates the data obtained from reactions at various temperatures of an enzyme with its specific substrate at pH .
Based on the data, what results could be predicted if the experiment were repeated at pH ?
Select an Answer
The available data are insufficient to make a reliable prediction.
An amount of product equal to that at pH would be formed.
An amount of product less than that at pH would be formed.
An amount of product more than that at pH would be formed.
Little or no product would be formed.
The correct answer is that for this question there are insufficient data to make a prediction, (A). Unlike the previous question, which called for an extrapolation within a small range of the obtained data, this question calls for a prediction at a pH times as acidic (remember that pH is a logarithmic scale). We have no information on the optimal pH of this enzyme, so choices (B), (C), (D), and (E) are all inappropriate.