首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
About fifty years ago, plant physiologists set out to grow roots by themselves in solutions in laboratory flasks. The scientists
About fifty years ago, plant physiologists set out to grow roots by themselves in solutions in laboratory flasks. The scientists
admin
2015-10-13
24
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
conies 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.
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
推断题型。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 highenergy 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://kaotiyun.com/show/IRwO777K
本试题收录于:
CATTI三级笔译综合能力题库翻译专业资格(CATTI)分类
0
CATTI三级笔译综合能力
翻译专业资格(CATTI)
相关试题推荐
Anachievementtestisdifferentfromaproficiencytestusuallyintwoways.Firstly,theaimsaredifferent.Anachievementte
[Topic]Iagreethattelevisionhasstoppedpeoplefromcommunicatingproperlythesedays.Reason1]Firstofall,peopledon
FamilyMattersThismonth,Wyomingpassedabillthatwouldgivelegalteethtothemoralobligationtosupportone’sparent
Scientistsareactivelyinvestigatingthefeedbackmechanismwithinthephysical,chemical,andbiologicalcomponentsofEarth’s
FossilformationsliketheBurgessShaleshowthatevolutioncannotalwaysbethoughtofasaslowprogression.TheCambrianexp
ContrarytotheargumentsofsomethatmuchofthePacificwassettledbyPolynesiansaccidentallymaroonedafterbeinglostand
Somepeopletrusttheirfirstimpressionsaboutaperson’scharacterbecausetheybelievethesejudgmentsaregenerallycorrect.
Doyouagreeordisagreewiththefollowingstatement?Childrenshouldbeginlearningaforeignlanguageassoonastheystarts
"TheEvolutionofBirds"TheOriginofBirdsAnalysisofbirdsandofreptilianfossilsindicatethatbirdsbelongtothe
ReconstructingAncientEnvironmentsP1:Archaeologyisparticularlyimportantforlearningaboutprehistoricsocieties,forwhom
随机试题
静电对电子设备的损害有:隐蔽性、潜在性、___________和复杂性。
一患儿以肠梗阻入院手术,术中医师将膀胱认作囊肿切除,造成患儿尿潴留、排尿功能严重受损。该事件中,医师的行为属
A.药物因素B.性别因素C.给药方法D.生活和饮食习惯E.工作和生活环境胶囊壳染料可引起固定性药疹
运营费用是从估价角度出发的,与会计上的成本费用不同,则下面不属于运营费用的是()。
会计工作岗位,可以一人一岗、一人多岗或者一岗多人。()
根据公司法规定,有限责任公司的股东会在通过一些特别决议时,必须经代表2/3以上表决权的股东通过。下列各项中,哪些决议不需要经代表2/3以上表决权的股东通过()。
关于无领导小组讨论,错误的表述是()。
对于接待规格理解正确的是()。
下列属于国家赔偿范围的是()。
2012年1一11月,我国电子信息产品进出口总额10685亿美元,同比增长4.1%,增速比1—10月提高0.8个百分点。其中,出口6273亿美元,同比增长4.5%,增速比1—10月提高0.6个百分点,占全国外贸出口的33.9%;进口4412亿美元,同比增
最新回复
(
0
)