首页
登录
职称英语
[originaltext] Let’s begin today by discussing enzymes. Enzymes are what mak
[originaltext] Let’s begin today by discussing enzymes. Enzymes are what mak
游客
2024-01-05
57
管理
问题
Let’s begin today by discussing enzymes. Enzymes are what make many of the body’s biochemical reactions possible. Actually biochemical reactions can take place without them, but at much lower rates. In fact an enzyme may cause a reaction to proceed billions of times faster than it would otherwise. Before I go on to the biochemical specifics of how this works, let me provide a figurative example. I think it will help illustrate the power of enzymes more clearly. Now, suppose you got a bag and you put a bunch of locks in it, just small padlocks. Then you put in all the keys that go with the locks. And you closed the bag and shook it hard. No matter how long you shook, chances are very small that any key would get inserted in any of the locks. But if you took them all out of the bag and this time used your hands to insert the keys in the locks, you could combine them much quicker.
Enzymes act like your hands, quickly allowing chemical reactions that would otherwise take much longer. Now, there are 2 reasons that enzymes are so effective at enabling biochemical reactions. Firs enzymes greatly reduce the amount of energy required to start the reactions, and with less energy needed the reactions can proceed a lot faster than they, could without the enzyme. The second mason is that on a small amount of an enzyme is needed to enable the biochemical reaction. That’s because the chemical structure of the enzyme itself does not become altered as if enables the reaction. So a single enzyme can be used to start the same biochemical reaction over and over again.
选项
A、It divides into Two different parts.
B、It keeps the same chemical structure.
C、It becomes part of a new chemical compound.
D、It produces more of the enzyme.
答案
B
解析
What point does the professor make about an enzyme when it is involved in a biochemical reaction?
转载请注明原文地址:https://tihaiku.com/zcyy/3335516.html
相关试题推荐
Themarketisnowsituated[br][originaltext]Youwillhearsomeonetalkingon
Themarketisnowsituated[br][originaltext]Youwillhearsomeonetalkingon
Themarketisnowsituated[originaltext]Youwillhearsomeonetalkingonthera
WhydidAnitaandLeechoosetotalkaboutJohnChapman?[br][originaltext]You
WhydidAnitaandLeechoosetotalkaboutJohnChapman?[br][originaltext]You
WhydidAnitaandLeechoosetotalkaboutJohnChapman?[originaltext]Youwill
WhatdoesthecharityForwardthinkingdo?[br][originaltext]Youwillhearar
WhatdoesthecharityForwardthinkingdo?[br][originaltext]Youwillhearar
WhatisChloeconcernedabout?[br][originaltext]Youwillheartwopeoplecall
WhatisChloeconcernedabout?[br][originaltext]Youwillheartwopeoplecall
随机试题
Whenandwherethenewhospitalwillhebuilt______amystery.A、toremainB、rem
Whichofthefollowingfractionshasthegreatestvalue?[img]2011q3/ct_egmatqm_e
属于芳香族氨基酸的是()。A.Tyr B.Arg C.His D.Asp
D
县级以上地方人民政府建设行政主管部门负责本行政区域内实施工程建设强制性标准的监督
肾脏具有多种功能,不包括()。A.调节体液、电解质、酸碱平衡和稳定的渗透
肾移植病人术前可能存在()A.低蛋白血症 B.贫血 C.凝血功能障碍
针对公路工程,定额建筑安装工程费包括()。A.定额直接费 B.定额设备购
不是新生儿筛查疾病是A、红细胞葡萄糖-6-磷酸脱氢酶缺乏症 B、先天性肾上腺皮
根据结构的反应特点分,雪荷载属于()。A.可变作用 B.静力作用 C.面荷
最新回复
(
0
)