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
DNA sequences from some of the most deadly pathogens(病原体)known to man can be bought over the Internet, the Guardian has discover
DNA sequences from some of the most deadly pathogens(病原体)known to man can be bought over the Internet, the Guardian has discover
admin
2015-01-31
56
问题
DNA sequences from some of the most deadly pathogens(病原体)known to man can be bought over the Internet, the Guardian has discovered.
In an investigation which shows the ease with which terrorist organizations could obtain the basic ingredients of biological weapons, this newspaper obtained a short sequence of smallpox(天花)DNA. The deadly virus has existed only in laboratories since being eradicated from the world’ s population 30 years ago.
The DNA sequence of smallpox, as well as other potentially dangerous pathogens such as poliovirus and 1918 flu are freely available in online public databases. So to build a virus from scratch, a terrorist would simply order
consecutive
lengths of DNA along the sequence and glue them together in the correct order. This is beyond the skills and equipment of the kitchen chemist, but could be achieved by a well-funded terrorist with access to a basic lab and PhD-level personnel.
One study estimated that because most people on the planet have no resistance to the extinct virus, an initial release which infected just 10 people would spread to 2.2 million people in 180 days.
The DNA sample we ordered had, at our request, three small modifications to render it harmless before it was sent by post to a residential address in London. The company has conceded that it was not aware it was sending out a sequence of modified smallpox DNA.
There are legitimate reasons for researchers to buy lengths of DNA from pathogens, for example in developing treatments or vaccines against them. However, because this industry is so new and unregulated, companies are selling custom-made DNA without making thorough checks on the identities of the people who are placing the orders or what the sequences are.
Of the four main companies operating in the UK, none currently screens all their DNA orders. There are 39 companies operating in North America and not all screen their orders.
The underlined word "consecutive" in the 3rd paragraph means______.
选项
A、serial
B、equal
C、different
D、same
答案
A
解析
词汇题。由题干可定位到第三段…order consecutive lengths of DNA…根据下文中along the sequence…(依照序列)并分析语义可知此处consecutive应表示连续长度的DNA。故答案选A。
转载请注明原文地址:https://kaotiyun.com/show/rkq7777K
0
大学英语四级
相关试题推荐
AaronSwartz.thebrilliantyoungsoftwareprogrammerandInternetactivistwhoinspiredaweandreverence(尊敬)fromleadingfigur
AaronSwartz.thebrilliantyoungsoftwareprogrammerandInternetactivistwhoinspiredaweandreverence(尊敬)fromleadingfigur
AaronSwartz.thebrilliantyoungsoftwareprogrammerandInternetactivistwhoinspiredaweandreverence(尊敬)fromleadingfigur
AaronSwartz.thebrilliantyoungsoftwareprogrammerandInternetactivistwhoinspiredaweandreverence(尊敬)fromleadingfigur
AaronSwartz.thebrilliantyoungsoftwareprogrammerandInternetactivistwhoinspiredaweandreverence(尊敬)fromleadingfigur
A、Solarenergy.B、Syntheticfuel.C、Alcoholfuel.D、Electricalenergy.D事实细节题。文中提到,若干年后,每个人都将驾驶电动汽车,因此人们不用担心汽油会耗尽。因此,电能将作为驱动汽车的能
Byimposingstrictrulesaboutalcohol,parentscanreducetheirkids’impulsestodrink,accordingtoanewstudy.【C1】_____
Byimposingstrictrulesaboutalcohol,parentscanreducetheirkids’impulsestodrink,accordingtoanewstudy.【C1】_____
Byimposingstrictrulesaboutalcohol,parentscanreducetheirkids’impulsestodrink,accordingtoanewstudy.【C1】_____
随机试题
以疏风清热、宣肺止咳为功用的方剂是( )。
设备工程管理的核心是()。
用曲线法进行投资偏差分析时,已完工程计划投资曲线和拟完工程计划投资曲线水平距离表示( )。
应在基底进行轻型动力触探的情况不包括()。
混凝土重力坝坝基面上的水压强度集合称为()。
债券的风险来自于()。
针对营业收入实施实质性分析程序,在建立数据的期望值时,可以进行的比较有()。
物业管理企业的组织机构设置要服从(),根据物业管理模式的任务和目标的不同,组织机构设置的重点也应该有所不同。
某村全体村民开会讨论村委会关于征地款的分配方案,村民们因为不赞成此分配方案而愤然起立,村长见状立即宣布:“起立者表示赞成,由于全体赞成,本方案通过!”由此可知( )
MuchhasbeensaidabouttheiPodanditsamazingpopularitywithpeopleofallagesandgroups.TheiPodphenomenonhasalsota
最新回复
(
0
)