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
J. Craig Venter and his colleagues recently announced that they had created the first cell to run on a fully artificial genome(基
J. Craig Venter and his colleagues recently announced that they had created the first cell to run on a fully artificial genome(基
admin
2016-01-05
45
问题
J. Craig Venter and his colleagues recently announced that they had created the first cell to run on a fully artificial genome(基因组). So what’s next for this man-made strain of microscopic(精微的)Mycoplasma mycoides(丝状支原体)and the new technology?
The "synthetic cell" achievement has been praised, condemned and undercut, but it has yet to fully demystify life’s underlying code, the genome.
Researchers built much of the bacterium’s(细菌)genome without fully understanding the function of many of the million-plus base pairs involved. About half of the genes, in fact, are still " a complete black box," said Richard Roberts of New England Biolabs, Inc. , in a commentary after Venter’s talk.
But a bit like complex builder sets can help illuminate some of the basic rules of physics and engineering, scientists are hoping that constructing—and deconstructing and reconstructing—whole genomes will help them better understand genomic principles. Scientists, for instance,, don’t yet know what role or importance the order of genes in the genome plays. They have seen that in some cases, genes can have their order exchanged with little visible outcome on life, whereas, specific sequence might be more important elsewhere on the genome.
Although the researchers based their synthetic genome on the natural one, their cell did not behave exactly the same, Venter noted. Usually when you mess around with the inner workings of a cell, especially its genetic code, growth rate tends to slow. With this one, however, there was a huge increase in the growth rate.
So how long will it be until scientists can synthesize genomes for other, more complex forms of life?
" One of the group’s long-term goals," said Venter, " is to develop a universal recipient cell, into which researchers can plug a variety of synthetic genomes and see how they run. " " And in the future" , he proposed, " it might be cheaper for scientists to synthesize simple organisms than to grow them. "
Roberts is happy to see the synthetic genome advance as a way to refocus research interest and attention on bacteria, which he calls " cute ... lovely little organisms. " In particular, being able to better understand the genomes of bacteria can have broad health implications for people, who host some 100 trillion microbial cells in and on their bodies.
The field of genomics, however, can be slow-going and riddled with many costly mistakes. Just one error small in earlier attempts to assemble a synthetic code set the researchers on Venter’s team back months. But James Watson, former head of Cold Spring Harbor Laboratory whose co-discovery of DNA more than 50 years ago helped to lay the foundation for this work, was pleased by the speed of progress. "We’ve been so much more successful that you might have predicted," he said at the symposium.
The attitude of the author towards the future of the field of genomics is ______.
选项
A、neutral
B、negative
C、indifferent
D、positive
答案
D
解析
由题干关键词the field of genomics定位到最后一段。尽管基因研究领域进展缓慢、困难重重,但作者引用詹姆斯·沃斯顿的话无疑给这个领域的研究者打了一针兴奋剂。再由整篇文章的基调可知,D)“积极的”符合题意,为正确答案。
转载请注明原文地址:https://kaotiyun.com/show/zOQ7777K
0
大学英语六级
相关试题推荐
Aroundtheworldmoreandmorepeoplearetakingpartindangeroussportsandactivities.Ofcourse,therehavealwaysbeenpeop
A、Theyshouldbeclearaboutwhattheyaregoingtodo.B、Theyshouldturntotheirparentsforhelp.C、Theyshouldignorethec
A、Theyrequiredsomekidstodosomephysicalexaminations.B、Theyaskedparentsabouttheirkids’sleepingcondition.C、Theytr
随着信息技术的发展,目前中国上网人口居世界之首,网民(netizens)数量达到了5.64亿,比美国和德国的人口总和还要多。不仅如此,巨大的网络流量(Internettraffic)正在逐渐转化成一系列相应的电子商务活动(e-commerceactiv
ItwasmusictomyearstohearthattheGovernment’schiefadviseron【C1】______,SusanJebb,wantsparentsto【C2】______fruitj
Baby-NamingTrendsA)Overthelastfiftyyears,Americanparentshaveradicallyincreasedthevarietyofnamestheygivetheirc
TheDodgeBrothersA)Itwas100yearsagothisweekthattheDodgebrothersfoundedthepowerfulcarbrandthatstillbearsthei
Rockclimbingisanactivityinwhichparticipantsclimbup,downoracrossnaturalrockformationsorartificialrockwalls.Th
ThenumberofpeoplewhosurftheInternetviamobiledevicesinChinahasforthefirsttime【C1】______thenumberusingcomputer
随机试题
青春期功能性子宫出血,止血首选药物是
A.肱骨外科颈B.尺骨粗隆C.髂嵴D.坐骨棘E.耻骨梳体表可以摸到的是
建设行政主管部门或者其他有关部门可以将施工现场的监督检查委托给()具体实施。
在箱涵顶进过程中,当顶力达到()倍结构自重箱涵未启动时,应立即停止顶进。
在世界著名金融杂志《欧洲货币》提出的计算国别风险的方法中,以下关于计算公式A-[A/(B-C)]×(D-C)的说法中,正确的有()
下列属于经济结构的有()。
A、 B、 C、 D、 B左边5含图形的规律是:处于2×2(即第2行第2列)位置上的黑色方块不动,第1个图中第1行第3列的黑色方块往下运动,第3行第3列的黑色方块往左移动,到第1列之后转到第4列。依此规律,下
新华社2007年5月24日受权全文播发了《中共中央国务院关于加强青少年()增强青少年体质的意见》。
Smokingmeans______(hurt)yourselfwithyourownhands.
A、AstudyoftheChicago-basedMarketResearchCorporation.B、Oneoftheessentialsforlife.C、Latestfiguresofpeoplewhodon
最新回复
(
0
)