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
Ariella Rosengard of the University of Pennsylvania didn’t set out to scare anyone. She just wanted to investigate a little-unde
Ariella Rosengard of the University of Pennsylvania didn’t set out to scare anyone. She just wanted to investigate a little-unde
admin
2019-06-10
82
问题
Ariella Rosengard of the University of Pennsylvania didn’t set out to scare anyone. She just wanted to investigate a little-understood part of the immune system by studying how viral proteins interact with it. At first, Rosengard worked with a common virus called vaccinia. But vaccinia rarely makes people sick, and she began to worry that it wouldn’t tell her much about the human immune system. So she turned to a closely related, far more fearsome virus: smallpox.
Smallpox virus isn’t easy to come by. Officially, it resides in only two places — secure labs in the United States and Russia. But Rosengard didn’t need the virus itself. Scientists have made its genetic code freely available on the Internet, giving her the data she needed to synthesize a key smallpox protein in the lab. Test-tube studies showed that it works far better than the corresponding vaccinia protein at blocking a key step in the human immune response. The discovery may help explain why smallpox kills, and it could lead to new treatments.
But when Rosengard published her report last month in the Proceedings of the National Academy of Sciences, a slightly defensive commentary appeared with it. The article said it would be unlikely to use the work as a blueprint for making vaccinia more like smallpox. It acknowledged, however, that " the idea that bioterrorists might be tempted to attempt such an experiment has been suggested as a reason for considering it unwise to publish observations of this nature. "
Rosengard rejects the idea that basic science like hers should be put under wraps. "Think how many brilliant minds would not be able to participate in finding a cure," she says. " You can’t predict the mind of a madman. The best defense against any virus is understanding how it functions. "
Most biologists would agree. But these days, they find themselves grappling with a dilemma, as their tradition of openness clashes with the fear that well-intentioned research could be misused to develop bioweapons. As much as scientists fear aiding their enemies, they get unnerved when government officials talk about restricting their freedom to publish. One thing’s for sure — the problem won’t just go away. The Government has proposed a dramatic increase in funding for basic research on potential biowarfare agents. This means that many more scientists will study deadly germs, and they’ll inevitably want to publish what they find.
How did she obtain the smallpox protein?
选项
A、She made it from information available online.
B、She relied on secure labs for a sample.
C、She developed it by using vaccinia virus.
D、She received help from government.
答案
A
解析
本题是细节题,题眼在第二段的第三旬。科学家们已经在网上公开了天花的基因密码,这使她可以在实验室合成天花蛋白。因此选项A为最佳答案。
转载请注明原文地址:https://kaotiyun.com/show/jcUO777K
0
考博英语
相关试题推荐
Almostsincethebeginningofmankind,governmentshavebeenrecordingthenumbersoftheirpopulace.Thefirstknowncensusrep
Almostsincethebeginningofmankind,governmentshavebeenrecordingthenumbersoftheirpopulace.Thefirstknowncensusrep
MichaelYessis,anemeritusprofessorofSportsScienceatCaliforniaStateUniversity,maintainsthat"geneticsonlydetermines
Ourstomachscanoftenbeamysterytousandmanyofusdon’trealizejusthowmuchthefoodweeatcanimpactonourmoodand
Ourstomachscanoftenbeamysterytousandmanyofusdon’trealizejusthowmuchthefoodweeatcanimpactonourmoodand
Moreandmorepeoplenowbelievethatthepurposeofuniversityeducationistocultivateacreativemind.Doyouacceptthisid
Racket,din,clamor,noise,whateveryouwanttocallit,unwantedsoundisAmerica’smostwidespreadnuisance.Butnoiseismor
Almostsincethebeginningofmankind,governmentshavebeenrecordingthenumbersoftheirpopulace.Thefirstknowncensusrep
SomeAfricanAmericanshavehadaprofoundimpactonAmericansociety,changingmanypeople’sviewsonrace,historyandpolitic
随机试题
女,50岁。因子宫肌瘤行全子宫切防术。术中医生发现患者左侧卵巢有病变应切除,在未征得患者及其家属同意的情况下,将左侧卵巢与子宫一并切除。术后患者恢复良好。该案例中,医生违背的临床诊疗伦理原则是
对于含有聚山梨酯的药物,其防腐能力不会受到破坏的是
某运营商新建光缆线路工程初步设计已完成,工程估算价为2500万元,通过招标确定了一家施工单位,并委托一家监理单位对本工程实施监理。中标施工单位做好了充分准备,在收到开工令后,工程顺利开工。本工程直埋部分与一条地下自来水管交越,部分路段采用立杆架空敷设;工
2003年2月,张某按市场价格出租个人所有的居民住房,取得租金收入500元,则其应纳的房产税税额为20元。()
乘坐火车过程中,导游要注意()。
Inwriting,______willgivestudentstheopportunitytoselectfromthelistthoseusefulideastobeincludedintheirwriting
《种子法》规定,种子贮备的具体办法由()规定。
若用SQL命令检索所有比“刘宁”基本工资多的职工记录,下列语句正确的是()。
以下关于删除表中记录的描述,正确的是( )。
有以下程序voidfun(double*p1,double*p2,double*s){s=(double*)calloc(1,sizeof(double));*s=*p1+*(p2+1);)
最新回复
(
0
)