Question

A student is testing the efficiency of an enzyme. He performs the experiment without the presence of the enzyme and times the rate of reaction. He then repeats the experiment but uses the enzyme and again times the rate of reaction. His research indicated that the reaction should have occurred faster in the presence of the enzyme. His results indicate that the enzyme did not increase the rate of reaction.

Which of the following is NOT a possible cause of these results?

(1 point)
Responses

The temperature was too low for the enzyme to function properly.
The temperature was too low for the enzyme to function properly.

Too much enzyme was present.
Too much enzyme was present.

The temperature was too high, and the enzyme was denatured.
The temperature was too high, and the enzyme was denatured.

The pH of the experiment was incorrect and inhibited enzyme activity.

Answer 1

"Too much enzyme was present."

Explanation: Low temperature, high temperature (denaturation), and incorrect pH can all inhibit enzyme activity. Having too much enzyme would not prevent the enzyme from increasing the reaction rate (at worst you reach substrate saturation), so it is not a likely cause.