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
Gene therapy and gene based drugs are two ways we could benefit from our growing mastery of genetic science. But there will be o
Gene therapy and gene based drugs are two ways we could benefit from our growing mastery of genetic science. But there will be o
admin
2011-01-10
36
问题
Gene therapy and gene based drugs are two ways we could benefit from our growing mastery of genetic science. But there will be others as well. Here is one of the remarkable therapies on the cutting edge of genetic research that could make their way into mainstream medicine in the coming years.
While it’s true that just about every cell in the body has the instructions to make a complete human, most of those instructions are inactivated, and with good reason: the last thing you want for your brain cells is to start churning out stomach acid or your nose to mm into a kidney. The only time cells truly have the potential to turn into any and all body parts is very early in a pregnancy, when so called stem cells haven’t begun to specialize.
Yet this untapped potential could be a terrific boon to medicine. Most diseases involve the death of healthy cells—brain cells in Alzheimer’s, cardiac cells in heart disease, pancreatic cells in diabetes, to name a few; if doctors could isolate stem cells, then direct their growth, they might be able to furnish patients with healthy replacement tissue.
It was incredibly difficult, but last fall scientists at the University of Wisconsin managed to isolate stem cells and get them to grow into neural, gut, muscle and bone cells. The process still can’t be controlled, and may have unforeseen limitations; but if efforts to understand and master stem cell development prove successful, doctors will have a therapeutic tool of incredible power.
The same applies to cloning, which is really just the other side of the coin; true cloning, as first shown with the sheep Dolly two years ago, involves taking a developed cell and reactivating the genome within, resetting its developmental instructions to a pristine state. Once that happens, the rejuvenated cell can develop into a full fledged animal, genetically identical to its parent.
For agriculture, in which purely physical characteristics like milk production in a cow or low fat in a hog have real market value, biological carbon copies could become routine within a few years. This past year scientists have done for mice and cows what Ian Wilmut did for Dolly, and other creatures are bound to join the cloned menagerie in the coming year.
Human cloning, on the other hand, may be technically feasible but legally and emotionally more difficult. Still, one day it will happen. The ability to reset body cells to a pristine, undeveloped state could give doctors exactly the same advantages they would get from stem cells: the potential to make healthy body tissues of all sorts, and thus to cure disease. That could prove to be a true "miracle cure".
The writer holds that the potential to make healthy body tissues will ______.
选项
A、aggravate moral issues of human cloning
B、bring great benefits to human beings
C、help scientists decode body instructions
D、involve employing surgical instruments
答案
B
解析
转载请注明原文地址:https://kaotiyun.com/show/FncO777K
本试题收录于:
NAETI中级口译笔试题库外语翻译证书(NAETI)分类
0
NAETI中级口译笔试
外语翻译证书(NAETI)
相关试题推荐
Wheninsectsfeedondecayingplantmaterialinacompostpile,theyhelpturnitintousefulgardensoil.
OfalltheemployedworkersintheUnitedStates,12.5millionarepartofatemporaryworkforce.TheUnitedStatesBureauofLa
OfalltheemployedworkersintheUnitedStates,12.5millionarepartofatemporaryworkforce.TheUnitedStatesBureauofLa
TheaffluentmiddleclasscreatedbytheAsianboomnowtakeupoverfromexportsasthemainengineofgrowth.
Haveyoueverreceived______ofwhathashappenedtoher?
Short-termmemoryisthemechanismwherewithoneremembersatelephonenumberonehaslookedupjustlongenoughtodialit;as
AlphaZeroseemstoexpressinsight.Itplayslikenocomputereverhas,intuitivelyandbeautifully,witharomantic,attacking
1986年全国人大常委会副委员长班禅喇嘛在西康地区大法会上教诲信徒们,要爱惜民族团结,维护祖国统一。在中国,公民的信仰自由受到法律保护。目前全西藏在寺僧尼约有14,000多人,另有800位宗教界人士在各级人大、政协、佛教协会和政府部门中工作。
从目前全球经济发展看,一些重要的特点和趋势值得我们高度重视。主要是:科技进步日新月异,前所未有地提高了人们认识和把握宏观世界和微观世界的能力,为人类推动生产力发展和创造美好生活提供了强大支持;国际生产要素优化重组和产业转移加快,各国经济发展更加紧密地联系在
A、Becauseitwasrareandextremelyexpensive.B、Becauseitwasoldandhadbeeninthefamilyforyears.C、Becauseitwastaken
随机试题
一例脓肾患者,使用多种抗生素及理疗后,病情仍较重,但对侧肾脏情况不了解,下一步治疗应
患儿4岁,发热3天,伴咳嗽、流涕。查体:眼结膜充血,第一磨牙对面的颊结膜有一直径约1mm的灰白色小点,外亩围着红色的圆晕。血常规白细胞在正带范围,淋巴细胞偏高。该患儿最可能的临床诊断是
A.于颈部正中线,指压可变形B.位于颈部正中线,随伸舌活动C.位于气管前,透光肿物D.位于颈侧部,透光肿物E.位于颈侧方,随伸舌活动甲状腺舌管囊肿常表现为
在队列研究中,估计某因素与某疾病关联强度的指标是
下列各项,属同名经配穴法的是
新生儿调节功能不成熟或异常、胎儿贮钙不足或出生后磷摄入量过多都可引起低钙血症,其诊断标准为血钙低于()mmol/L。
关于被害人承诺,下列说法错误的是:()
试述如何完善我国银行业监督管理体制。
马克思指出:“在原始积累的历史中,对正在形成的资本家阶级起过推动作用的一切变革,都是历史上划时代的事情;但是首要的因素是:大量的人突然被强制地同自己的生存资料分离,被当作不受法律保护的无产者抛向劳动市场。”马克思的这段话表明资本原始积累是
Duringrecentyearswehaveheardmuchabout"race":howthisracedoescertainthingsandthatracebelievescertainthingsand
最新回复
(
0
)