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
2025-01-31
21
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 free 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
本题考查细节理解。根据第一段倒数第三句“The process of respiration uses sugar tomake the high energy compound ATP”可知,ATP是一种高能量化合物。所以,答案是C。
转载请注明原文地址:http://tihaiku.com/zcyy/3937351.html
相关试题推荐
Aboutfiftyyearsago,plantphysiologistssetouttogrowrootsbythemselv
Aboutfiftyyearsago,plantphysiologistssetouttogrowrootsbythemselv
Aboutfiftyyearsago,plantphysiologistssetouttogrowrootsbythemselv
Aboutfiftyyearsago,plantphysiologistssetouttogrowrootsbythemselv
Aboutfiftyyearsago,plantphysiologistssetouttogrowrootsbythemselv
Aboutfiftyyearsago,plantphysiologistssetouttogrowrootsbythemselv
Somemedicalconditionscanoftencurethemselves______,withoutmedicalinterve
Aboutfiftyyearsago,plantphysiologistssetouttogrowrootsbythemselv
Aboutfiftyyearsago,plantphysiologistssetouttogrowrootsbythemselv
Aboutfiftyyearsago,plantphysiologistssetouttogrowrootsbythemselv
随机试题
Japaneseworkersstillputinanimpressive42hourseachweekbuttheyare_____
TheSecondContinentalCongresswasheldin______in1775.A、WashingtonB、Philad
Letme______youIwillusewhateverforceisnecessarytorestoreorder.A、insu
MaryaskedJohnifitwastheplace______heboughttheflowers.A、whatB、thatC
TheEndoftheCashEraInthespringAdamSmithwill
[originaltext]W:Hi,Dr.Hyde.M:So,whatseemstobetheproblemtoday?W:We
2
商品流通企业战略分析中的五种基本竞争力,是由()提出的。A:德鲁克 B:迈克尔
绝经激素治疗的治疗原则包括()A.必须有明确的适应证且无禁忌证 B.药物的选择
下列关于国内信用证的说法中,不正确的是()。A.我国的信用证是以人民币计价、不
最新回复
(
0
)