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
2016-11-25
27
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 turn 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".
Which of the following is true according to the text?
选项
A、The principle of gene therapy is applicable to that of cloning.
B、The isolation of stem cells is too difficult to be feasible.
C、It is reasonable for all body instructions to be activated.
D、Cloned animals will eventually take control of the world.
答案
A
解析
文章后面指出其实基因治疗的原理和克隆的原理两者完全是可以通用的,具体的解题点在于文章的第五段第一句话“the same applies to cloning”。故应选A。
转载请注明原文地址:https://kaotiyun.com/show/znWd777K
本试题收录于:
公共英语五级笔试题库公共英语(PETS)分类
0
公共英语五级笔试
公共英语(PETS)
相关试题推荐
Peoplewhohavealotofstressaremorelikelytobecomesick.
Thingsmustbegoingwellintheparcelsbusiness.Consumersandcompaniescontinuetoflockindrovestotheinternettobuyan
AnswerQuestionsbyreferringtothecommentson3differentplanetsinthefollowingmagazinearticle.A=SaturnB=V
______hadappliedJohnLocke’stheoryinhisstudiesofphilosophy?______wrotesomephilosophicalworkswhichwasmetwithlit
Accordingtothepassage,allofthefollowingwerebenefitsofprivatizingstate-ownedindustriesintheUnitedKingdomEXCEPT
Researchersinbehavioralpsychologyaredividedwithregardto______.Asmanifestedintheexperimentalstudy,rapideyemove
Thewriter’sgeneralattitudetowardsFreudiantheoryaboutrisk-takingbehavioris______.Whichofthefollowingbestsummari
Behavioralmanagement.
Accordingtothepassage,whatweredogstrainedforinthepast?
Afterathree-yearsurveyofthesocialandbehavioralsciences,acommitteeoftheNRChasconcludedthatthesesciencesarelo
随机试题
神经胶质细胞对神经细胞起______________、______________、______________和______________等功能。
手术过程中,清点核对器械,敷料的时间是()
有关骨盆轴的叙述,下列正确的是()
根据票据背书的连续性要求,第一次背书的背书人应当是:()
租入固定资产登记簿属于()。
下列各项中,应计入加工收回后直接出售的委托加工物资成本的有()。
2011年12月1日,A公司与B租赁公司签订了—份租赁合同。合同主要条款及其他有关资料如下:(1)租赁标的物:CF型数控车床。(2)租赁期开始日:2011年12月31日。(3)租赁期:2011年12月31日~2014年12月31日,共计36个月。(
A、 B、 C、 D、 A四个小圆圈顺时针旋转。故选A。
Whichofthefollowingwordsisinflectional?
ToliveintheUnitedStatestodayistogainanappreciationforDahrendorf’sassertionthatsocialchangeexistseverywhere.T
最新回复
(
0
)