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
51
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
NarratorListentopartofaconversationbetweenastudentandaprofessor.Nowgetreadytoanswerthequestions.You
Whatisthepassagemainlyabout?Theauthormentionstheshoeindustryinthesecondparagraphtoprovideanexampleofhow
A、Sheexpectstheweathertobenicenextweekend.B、Sheforgotshehadsomuchstudyingtodo.C、Sheusuallyhandsinherassig
Tom’sproblemisthathemusthaveusedacomputerforalongtime,buthiseyesfeeldryandtired.Thetwosolutionstheydisc
UnitedStatesGovernmentWhydoestheprofessormentiontheKennedyCenterandLincolnCenter?
Youwillnowbeaskedtogiveyouropinionaboutafamiliartopic.Giveyourself15secondstoprepareyourresponse.Thenrecor
Directions:Anintroductorysentenceforabriefsummaryofthepassageisprovidedbelow.Completethesummarybyselectingthe
"GeothermalEnergy"GeothermalenergyisnaturalheatfromtheinterioroftheEarththatisconvertedtoheatbuildingsand
1AftertheUnitedStatespurchasedLouisianafromFrance,PresidentJeffersoncalledforanexpeditiontoexplorethenewterri
WhentheErieCanalwasbuiltinthe1820’s,itwastheengineeringmarvelofitstime.
随机试题
在黑盒测试方法中,设计测试用例的主要根据是()。
()除出现头昏、眼花、耳鸣等以外,还会出现昏厥或痉挛,体温超过40℃。
________的人民政府,可以根据法律和行政法规,制定规章。
关于辅助性T细胞被抗原活化,下述哪一项是正确的
公司分立以原公司法人资格是否消灭进行分类,可分为()。
下列关于楼地面工程量计算规则中叙述正确的是()。
造成设备无形磨损的原因有()。
壮族忌食()。
下列运算符不能重载为友元函数的是()。
数列按照1,2,2,3,3,3,4,4,4,4,5,…的规律一直排下去,whichofthefollowingisthe100thnumber?
最新回复
(
0
)