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
47
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
Theimpactofdecentralizationtrends,ofcourse,extendswellbeyondcities.Sprawlingdevelopmentpatternsaredestabilizingm
MichaelYessis,anemeritusprofessorofSportsScienceatCaliforniaStateUniversity,maintainsthat"geneticsonlydetermines
Almostsincethebeginningofmankind,governmentshavebeenrecordingthenumbersoftheirpopulace.Thefirstknowncensusrep
Almostsincethebeginningofmankind,governmentshavebeenrecordingthenumbersoftheirpopulace.Thefirstknowncensusrep
SomeAfricanAmericanshavehadaprofoundimpactonAmericansociety,changingmanypeople’sviewsonrace,historyandpolitic
SomeAfricanAmericanshavehadaprofoundimpactonAmericansociety,changingmanypeople’sviewsonrace,historyandpolitic
Americansocietyisnotnap(午睡)friendly.Infact,saysDavidDinges,asleepspecialistattheUniversityofPennsylvaniaSchool
随机试题
已知D(X)=25,D(Y)=36,X与Y的相关系数ρXY=0.4,则D(X+Y)=________
Peopleusedtosay,"Thehandthatrocksthecradle(摇篮)rulestheworld."And【56】everysuccessfulmanthere’sawoman."【5
A.偏旁部首法B.字母顺序排列法C.四角号码顺序法D.汉语拼音法E.注音字母法适用于负责有外宾人员医疗任务的医院使用的姓名索引方法是
A.咳逆上气B.恶心呕吐C.头晕目眩、耳鸣D.胃脘疼痛E.脘腹有重坠感胃气上逆,可引起的症状是
黄龙风景区位于四川省松潘县境内,是中国唯一保护完好的高原湿地,地表钙华是黄龙景观的最大特色。()
党的十七届四中全会指出,新形势下党面临的长期的、复杂的、严峻的考验是()。
德国哲学家叔本华说,要想把一个人变傻,最好的办法就是叫他不停地读书。他在《论阅读和书籍》中写道,“如果一个人几乎整天大量阅读,空闲的时间则只稍作不动脑筋的消遣,长此以往就会逐渐失去自己独立思考的能力,就像一个总是骑在马背上的人最终会丧失走路的能力一样。许多
Theprocessbymeansofwhichhumanbeingsarbitrarilymakecertainthingsstandforotherthingsmaybecalledthesymbolicpro
有一个部落位于沼泽地边缘,经常出现人和牲畜陷入沼泽溺亡的事,导致该部落人口稀少,经常被其他部族欺负。为了摆脱这种局面,全族人迁到了一片水草肥美的草原。环境的改变导致该部落人口大量增加,马匹牲畜也膘肥体壮,逐渐吞并了其他部落成为草原的霸主,并最终入主中原,导
Jimmyistheoldestboyandistallerthan______boysintheclass.
最新回复
(
0
)