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 immobilized on 33i+cude2mb2-w wznd a matrix and its activi ) s3 k,el0a8 :7sipev*obtwuuty was compared with that of a free o:belk0i7a8v we,sp *)u s3ut enzyme in solution. The graph shows the relative enzyme activity (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 enzy i54+dgq9.c fn5 geohm.2df: nu7sfrwme made it less sensitive to changes in pH since it shows more activity than the soluble enzyme from pH 5.5 to 7.5. Choices A, B and D do not include the thre:e d fgqrm7n5 hi.d9u so2w4n.5fc f+ge statements, so they are not correct.
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