Passage VII
Enzymes are large protein molecules that increase the rate of chemical reactions in living systems. The substrate is the substance that interacts with the enzyme in a reaction. The acceleration factor is the factor by which the enzyme increases the rate of a reaction. Figures 1–3 show the effects that changes in temperature, pH, and substrate concentration have on the rate of reaction of a substrate when Enzymes A and B are present. Figure 4 shows the effects that changes in the concentrations of Enzymes A and B have on the rates of reaction in substrate solutions of the same concentration.
37. Based on the data in Figure 2, at which of the following pHs, if any, do Enzymes A and B have the same acceleration factor?
Your Answer is
Correct Answer is B
Explanation
Look at the intersection of curve A and curve B in figure 2, the abscissa at the intersection is about 6.7