本题目来源于试卷: Interaction & Interdependence C.1 Enzymes & Metabolism，类别为 IB生物学
[单选题]
Enzymes play a role in c 2y37gm .pla6- enwkgnata 7,obpbi m/6adlysing reactions. Which of the following statements are trup,obda mi6/7b e?
I.The substrate is temporarily provided with energy before being converted to a product.
II. Enzymes reduce the activation energy needed for the reaction.
III.The active site binds to the substrate making it easier for bonds to be broken or formed.
A. I only
B. I, II only
C. I, III only
D. I, II and III
参考答案: D
本题详细解析:
The substrate must be provided temporarily with ene-lcmnd ast es u(rrb jq )2te62n.oy+63 (i:eergy in most metabolic reactions and this is called activation energy (in a test tube activation energy is often provided by heating the contents +r m qes ycba)sed2u .r3ejnl(:n (o6etit26-of the tube).
Enzymes reduce the activation energy for the reaction by stressing bonds in the substrate and by orienting the substrate to make it easier for bonds to be broken or made.
All three statements are true.
The other choices (Choices A, B and C) do not include all three statements.
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