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 and 2 show the effects that changes in temperature, and pH have on the rate of reaction of a substrate when Enzymes A and B are present.

Question

According to Figure 2, Enzyme A has the fastest rate of reaction at a pH closest to:

(1 point)
Responses

8
8

9
9

6
6

5
5
Question 2
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?(1 point)
Responses

At none of the pHs shown in the diagram
At none of the pHs shown in the diagram

At all pHs between 2 and 11
At all pHs between 2 and 11

At pH 5 only
At pH 5 only

At pH 6.7 only

Answer 1

At pH 6.7 only

Answer 2

what about the 1st question?

Answer 3

According to Figure 2, Enzyme A has the fastest rate of reaction at a pH closest to 6.