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
医学
At 9:00 in the evening on January 29, just as President George W. Bush was about to begin his first State of the Union address,
At 9:00 in the evening on January 29, just as President George W. Bush was about to begin his first State of the Union address,
admin
2013-12-06
38
问题
At 9:00 in the evening on January 29, just as President George W. Bush was about to begin his first State of the Union address, I gathered with three anxious scientists in a small, windowless laboratory in Worcester, Massachusetts. We were at Advanced Cell Technology — a privately owned biotechnology company that briefly made international headlines last fall by publishing the first scientific account of cloned human embryos. The significance of the achievement was debatable: the company’s most successful embryo had reached only six cells before it stopped dividing(one other had reached four cells, another had reached two)— a fact that led to a widespread dismissal, in the media and the scientific community, of ACT’s "breakthrough". The work was largely judged to be preliminary, inconsequential, and certainly not worthy of headlines. Many people in political and religious circles, however, had a decidedly different view. They deemed ACT’s work an ethical transgression of the highest order and professed shock, indignation, and horror.
Nonetheless, ACT was pressing ahead—which was why I had come to the company’s cloning lab that night in January. The door to the lab was locked; a surveillance camera mounted on the ceiling watched our every move; and the mood was at once urgent and tense. A human egg, retrieved just hours earlier from a young donor, was positioned under a microscope, its image glowing on a nearby video monitor. The egg’s chromosomes would shortly be removed, and the scientists in the room would attempt to fuse what remained of the egg with a human skin cell. If the procedure succeeded, the result would be a cloned human embryo.
Skin cell to embryo—it’s one of the most remarkable quick-change scenarios modern biology has to offer. It’s also one of the most controversial. Since the announcement, in 1997, of the cloning of the sheep Dolly, attempts to use human cells for cloning have provoked heated debate in the United States, separating those who have faith in the promise of the new technology from those who envision its dark side and unintended consequences.
Crucial to the debate is the fact that human cloning research falls into two distinct categories: reproductive cloning, a widely frowned-on effort that aims to produce a fully formed child; and therapeutic cloning, a scientifically reputable procedure that takes place entirely at the microscopic level and is designed to advance medical merapies and cure human ailments. The two start out the same way—with a new embryo in a Petri dish. But the scientists I was observing in the lab had no intention of creating a person. Instead they were embarking on an experiment that, if successful, would be a first step toward creating radical new cures for patients like the donor of the skin cell— Trevor Ross(not his real name), a two-year-old boy afflicted with a rare and devastating genetic disease.
The mood in the lab was tense in part because of the uncertain outcome of the experiment. But it was also tense because of concern over what President Bush might say about cloning in his address to the nation. A radio in one corner of the room was tuned to the broadcast as the scientists began their work, and they were listening carefully: in perhaps no other fields of science are researchers as mindful of which way the political winds are blowing. The ACT scientists had good reason to be concerned—what they were doing that night might soon be made illegal.
According to the passage, human cloning is clearly categorized as______.
选项
A、political and religious
B、reproductive and therapeutic
C、debatable and controversial
D、preliminary and inconsequential
答案
B
解析
根据第四段第一句话,克隆人研究分成独特的两个类型:繁衍性克隆和治疗性克隆。
转载请注明原文地址:https://kaotiyun.com/show/p8U3777K
本试题收录于:
医学博士外语题库考研分类
0
医学博士外语
考研
相关试题推荐
Imagineadiseasespreadingacrosstheglobe,killingmostlymiddle-agedpeopleorleavingthemchronicallydisabled.Thenoned
Despitegrowingnumbersofjoggers,CanadaFitnessSurveysacrossthecountrydemonstratethatCanadiansarelessphysicallyfit
Thepopularideathatclassicalmusiccanimproveyourmathsisfallingfromfavor.Newexperimentshavefailedtosupportthew
A、Getmoretimetorelax.B、Takesometranquilizers.C、Seekasecondopinion.D、Avoidherresponsibilities.A男士没有查出女士有什么问题,他觉得女士
Twoequallybrilliantscientistsapplyforaprestigiousresearchfellowshipawardedbyatopscientificorganization.Oneiswh
Whydopeoplealwayswanttogetupanddancewhentheyhearmusic?Theusualexplanationisthatthereissomethingembeddedin
Fourteen-year-oldSeanMeCallumlayinahospitalbedwaitingforanewheart.Withoutit,Scanwoulddie.Sean’scaseisnotu
Childrenshouldavoidusingmobilephonesforallbutessentialcallsbecauseofpossiblehealtheffectsonyoungbrains.Thisi
A、DDTbroughtsomeproblemsthatneedtobesolvedthemselves.B、DDTbroughthumanbeingssomehealthproblemsthatneededtobe
I_____thechancetospendaneveningwithmyuncle.
随机试题
数控机床主传动系统有哪些变速方式?各种变速方式有什么特点?
骨折块碎裂成两块以上者为
输血前血型血清学检查不包括
查斗不需记录的内容是
我国《商标法》规定,注册商标的有效期为()年。
某工业企业生产甲、乙两种产品有关资料如下表。甲产品本月完工100件,在产品100件,在产品完工程度30%;乙产品本月全部完工80件。假定原材料于生产开始时一次投入,工资及制造费用在生产过程中均衡发生,原材料按定额比例分配,工资及制造费用
关于违约金的说法,正确的有()。
太平天国由盛转衰的标志是()。
温家宝总理在第十届全国人民代表大会第五次会议上所作的《政府工作报告》中指出:“今年要在全国范围建立农村最低生活保障制度……各地要根据实际,合理确定低保对象范围和标准,中央财政对困难地区给予适当补助。”农村最低生活保障制度()。①是一种社会救济制度②
ImportanceofthePublicImagePublicimagereferstohowacompanyisviewedbyitscustomers,suppliers,andstockholders,
最新回复
(
0
)