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
61
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".
Towards the genetic research, the author’s attitude can best be said to be that of ______.
选项
A、frustration
B、indifference
C、amazement
D、opposition
答案
C
解析
转载请注明原文地址:https://kaotiyun.com/show/hncO777K
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
Withtheunderstandingofphobiashascomeamagicbagoftreatments:exposuretherapythatcanstompoutalifetimephobiaina
Theseniorsenatorhasinthepastthreetermsbothexperiencedthesweettasteofsuccessandthebitternessofdefeatinhisl
"Whatdoesthemiddlemandobutaddtothepriceofgoodsintheshops?"Suchremarksareaimedattheintermediateoperationsb
Nowwhicharetheanimalsreallytobepitiedincaptivity?First,thosecleverbeingswhoselivelyurgeforactivitycanfindn
Nowwhicharetheanimalsreallytobepitiedincaptivity?First,thosecleverbeingswhoselivelyurgeforactivitycanfindn
KingdomofWonders,______in1995inFremont,Calif.,becameanindustrylegendfortwotoys:atalkingbearandaray-gungame.
Therecentconferenceontheeffectiveuseoftheseasandoceanswasanotherattemptresolvingmajordifferencesamongcountrie
Ourcompanyhasbeenmadeoneofthelargestmanufacturersinthefieldofchemicalindustry.
TheBritishHistorynotonlygivescitiestheirshape;italsomoldstheirself-image.Since1941,whenLondonemergedfrome
我想谈一下全球经济增长与宏观政策作用之间的关系。我先来回顾一下全球经济。全球经济的表现比一年前人们所担心的要好得多了,现在预计全球经济增长今年将达到4.5%,为五年以来的最高水平。美国再一次成为全球经济增长的主动力,但是中国急速的工业化进程也刺激了全球的经
随机试题
X企业2009年12月销售商品一批,增值税发票已经发出,商品已经发出,并办妥托收手续,但此时得知对方企业在一次交易中发生重大损失,财务发生困难,短期内不能支付货款,为此,X企业本月未确认收入,这体现了()会计核算质量要求。
A.丝氨酸B.蛋氨酸C.二者均是D.二者均不是(1997年)能提供一碳单位的氨基酸是
女,42岁,胸痛3天,CT检查示右肺中叶近外侧胸壁处类圆形病灶,边界清楚,无钙化,邻近胸膜增厚,增强扫描呈厚壁环样强化。为明确诊断应采取的最佳措施是
急性肝炎时,LD同工酶的特点是
毒蛇咬伤风毒轻证毒蛇咬伤风火毒证
风心病,心功Ⅲ级妇女患右侧输卵管妊娠破裂。手术应行
不宜设置地漏的百级洁净区,可进行
A注册会计师担任X公司2009年度财务报表审计业务的项目负责人。在审计过程中,A注册会计师需要考虑下列与重要性水平相关的问题,请代为做出正确的决策。以下各项因素中,与认定层次重要性水平成同向变动关系的是()。
什么是元认知?元认知的作用有哪些?
1946年,中共中央决定将抗日战争时期的减租减息政策改变为实现“耕者有其田”政策的重要文件是()
最新回复
(
0
)