本题目来源于试卷: Interaction & Interdependence C.1 Enzymes & Metabolism，类别为 IB生物学
[单选题]
How does denaturatiow*7x6 xfy /affn1dl t/pg llop;.c /p v(i1hn(v change the properties of an enzyme?
A. The enzyme structure is changed but it can still bind the substrate.
B. The structure of the enzyme is changed so that it can no longer function as a catalyst.
C. There can be a change in the amino acid sequence of the protein and its tertiary structure is altered.
D. It makes the enzyme more active at high temperatures.
参考答案: B
本题详细解析:
A denatured enzyme has lost its tertiary structure. It is no longerwv/xah,p ez41 able to function and cannot catalyze reactions.
The active site will not be able to bind to the substrate in most cases (Choice A).
Usuallhzepwx/14 v ,ay, the sequence of amino acids is not altered. A denatured enzyme has had its three-dimensional structure altered (Choice C).
High temperatures, specifically temperatures above the optimum temperature for a given enzyme cause denaturation and the enzyme can no longer catalyze reactions (Choice D).
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