本题目来源于试卷: Interaction & Interdependence C.1 Enzymes & Metabolism，类别为 IB生物学
[单选题]
Enzyme A (Enz A) was im 7i 257fm(e2 zy5st8ted4 libw af -toi9wc ( k4d*ml405wqmglm/uh1ry oh a f.mobilized on a matrix and its activity was compared with that of a free enzyme in solution. The graph shows the relative enzyme activity q40wy*fm/4 ko9 gh5l muram 1 wd.lh(c(y-axis) with varying pH (x-axis).
Which of the following statements is true?
I. Both soluble and immobilized enzymes are inactive at higher pH values of 8.
II. The immobilized Enz A is more resistant to pH changes showing more activity than the soluble enzyme at most tested pH values.
III. Immobilizing Enz A did not decrease its catalytic activity.
A. I and II only
B. I only
C. I, II and III
D. I and III only
参考答案: C
本题详细解析:
All three statements are true. Immobilizing the enzyme made it l27.,1toluz 4u abkyrz5l py -iess sensitive to changes in pH si2luuy l1zokzr5-4iy .pa tb,7nce it shows more activity than the soluble enzyme from pH 5.5 to 7.5. Choices A, B and D do not include the three statements, so they are not correct.
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