首页
登录
职称英语
About fifty years ago, plant physiologists set out to grow roots by themselv
About fifty years ago, plant physiologists set out to grow roots by themselv
游客
2025-02-03
37
管理
问题
About fifty years ago, plant physiologists set out to grow roots by themselves in solutions in laboratory flasks. The scientists found that the nutrition of isolated roots was quite simple. They required sugar and the usual minerals and vitamins. However, they did not require organic nitrogen compounds. These roots got along fine on mineral inorganic nitrogen. Roots are capable of making their own proteins and other organic compounds. These activities by roots require energy, of course: The process of respiration uses sugar to make the high energy compound ATP, which drives the biochemical reactions. Respiration also requires oxygen. Highly active roots require a good deal of oxygen.
The study of isolated roots has provided an understanding of the relationship between shoots and roots in intact plants. The leaves of the shoots provide the roots with sugar and vitamins, and the roots provide the shoots with water and minerals. In addition, roots can provide the shoots with organic nitrogen compounds. This comes in handy for the growth of buds in the early spring when leaves are not yet functioning. Once leaves begin photosynthesizing, they produce protein, but only mature leaves can "export" protein to the rest of the plant in the form of amino acids. [br] According to the passage, what is ATP?
选项
A、A biochemical process.
B、The tip of a root.
C、A chemical compound.
D、A type of plant cell.
答案
C
解析
第一段提到(块)根需要sugar and the usual minerals and vitamins,但不需要 organic nitrogen compounds,因(块)根可自造所需的蛋白质和其它organic compounds;这里反复提到的organic compounds应包括the high energy compound ATP(见第一段倒数第二句);因此可推断出选项C(一种化合物)为答案。
转载请注明原文地址:https://tihaiku.com/zcyy/3940557.html
相关试题推荐
Aboutfiftyyearsago,plantphysiologistssetouttogrowrootsbythemselv
Aboutfiftyyearsago,plantphysiologistssetouttogrowrootsbythemselv
Aboutfiftyyearsago,plantphysiologistssetouttogrowrootsbythemselv
Aboutfiftyyearsago,plantphysiologistssetouttogrowrootsbythemselv
Aboutfiftyyearsago,plantphysiologistssetouttogrowrootsbythemselv
Aboutfiftyyearsago,plantphysiologistssetouttogrowrootsbythemselv
Aboutfiftyyearsago,plantphysiologistssetouttogrowrootsbythemselv
Aboutfiftyyearsago,plantphysiologistssetouttogrowrootsbythemselv
Aboutfiftyyearsago,plantphysiologistssetouttogrowrootsbythemselv
Aboutfiftyyearsago,plantphysiologistssetouttogrowrootsbythemselv
随机试题
ThisstoryisaboutNewYear’sEvein______.[br]JapanclimbMountFujito___
__________________(你越注意别人对你的印象),themoreyouwillfeelnervous.Themoreyoucar
[originaltext](13)Inrecentyears,thedeathrateamongAmericancentenari
DothefollowingstatementsagreewiththeinformationgiveninReadingPassage
StatisticsI.Statisticsin【T1】________A.
INeverThoughtItCouldHappentoMe
下面哪一项不属于方案阶段BIM应用?()A.分配平面空间 B.日照分析 C.
社会工作者不断向社区居民骨干灌输“当家作主”的理念,协助他们建立自主和自立的意
《水浒传》
隧道相向开挖两工作面接近()时,应停止一端作业。A.9m B.11m C.
最新回复
(
0
)