Which of the following graphs most likely describes the effect of pH on the function of the enzyme catalase in human cells? Note: The x-axis is pH and the y-axis is enzyme activity.

Question

Quizplus · Accepted Answer

Enzyme activity increases with pH until it reaches the optimum pH, after which it decreases. The graph in choice C shows this pattern, with a peak at pH 7.5-8.0, which is the typical optimum pH for catalase in human cells. The other graphs do not show the peak in enzyme activity at an optimum pH and in some cases, show a decreasing trend in activity as pH increases.

Which of the Following Graphs Most Likely Describes the Effect