本题目来源于试卷: Interaction & Interdependence C.1 Enzymes & Metabolism，类别为 IB生物学
[单选题]
Which are correct de 0b-k2 ffqkqu9s.u lne 2 wi5nlrbjem-:4 e4/ms *ref2tod:j 6siz); hxcriptions of the enzyme catalysed metabolic pathways shown below? Letters represent 2;ix*6ths ze r)jf :dovarious products of individual reactions.
A. Pathway 1 is Chain: Intermediate A is constantly regenerated , Pathway 2 is Chain: End product is D
B. Pathway 1 is Chain: Chain: End product is D , Pathway 2 is Cyclical:Cyclical: Intermediate A is constantly regenerated
C. Pathway 1 is Chain: Intermediate A is constantly regenerated , Pathway 2 is Cyclical: End product is D
D. Pathway 1 is Cyclical: End product is D , Pathway 2 is Cyclical: Intermediate A is constantly regenerated
参考答案: B
本题详细解析:
Both metabolic pathways are catawp 4 qgzyi79 .8yatm6m 2u;ic y)xz0h+0mttd nlysed by a series of different enzymes. Pathway 1 proceeds in a linear manner, and the end product is D. Pathway 2 is a cycle where the various products, such as A, are constantly regenerated.
Pathway 1 is a chain reaction an6m tmz; tmz0cixw n+pqa2 8yy90yh)gi d ut74.d Pathway 2 is a cyclical reaction, so Choices A and D are not correct.
The end product for Pathway 1 is D, and the products keep cycling in Pathway 2, so Choice C is not correct.
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