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
Research into DNA has had a significant impact on medicine. Through recombinant DNA technology, scientists can modify microorgan
Research into DNA has had a significant impact on medicine. Through recombinant DNA technology, scientists can modify microorgan
admin
2011-02-11
33
问题
Research into DNA has had a significant impact on medicine. Through recombinant DNA technology, scientists can modify microorganisms so that they become so-called factories that produce large quantities of medically useful drugs. This technology is used to produce insulin, which is a drug used by diabetics, and interferon, which is used by some cancer patients. Studies of human DNA are revealing genes that are associated with specific diseases, such as breast cancer. This information is helping physicians to diagnose various diseases, and it may lead to new treatments. For example, physicians are using a technology called chimeriplasty, which involves a synthetic molecule containing both DNA and RNA strands, in an effort to develop a treatment for a form of hemophilia.
Forensic science uses techniques developed in DNA research to identify individuals who have committed crimes. DNA from semen, skin, or blood taken from the crime scene can be compared with the DNA of a suspect, and the results can be used in court as evidence.
DNA has helped taxonomists determine evolutionary relationships among animals, plants, and other fife forms. It is useful for this purpose, because closely related species have more similar DNA than do species that are distantly related. One surprising finding to emerge from DNA studies is that vultures of the Americas are more closely related to storks than to the vultures of Europe, Asia, or Africa.
Techniques of DNA manipulation are used in farming, in the form of genetic engineering and biotechnology. Strains of crop plants to which genes have been transferred may produce higher yields and may be more resistant to insects. Cattle have been similarly treated to increase milk and beef production, as have hogs, to yield more meat and less fat.
Despite the many benefits offered by DNA technology, some critics argue that its development should be monitored closely. One fear raised by such critics is that DNA fingerprinting could provide a means for employers to discriminate against members of various ethnic groups. CritiCs also fear that studies of people’ s DNA could permit insurance companies to deny health insurance to those people at risk for developing certain diseases.
The use of DNA technology in agriculture has also sparked controversy. Some people question the safety, desirability, and ecological impact of genetically altered crop plants. In addition, animal rights groups have protested against the genetic engineering of farm animals.
Despite these and other areas of disagreement, many people agree that DNA technology offers a mixture of benefits and potential hazards. Many experts also agree that an informed public can help assure that DNA technology is used wisely.
What is the main idea of the (last three paragraphs)?
选项
A、DNA’s future tendencies.
B、DNA’s controversy.
C、DNA’s potentials.
D、DNA’s social issues.
答案
D
解析
后三段讲的是DNA应用在社会上引起的一些问题和争论,故选D。
转载请注明原文地址:https://kaotiyun.com/show/A8eO777K
0
专业英语八级
相关试题推荐
Mostpeoplecanrememberaphonenumberforuptothirtyseconds.Whenthisshortamountoftimeelapses,however,thenumbersa
A、dissolvetheparentalrelationshipB、putthechildinafosterhomeC、punishtheparentsD、reconcilethechildwithhisparent
A、Japan’sPrimeMinisterpaysannualvisittoitB、ItisurgingJapanesepoliticianstocontinualvisitsC、ManyAsiancountryst
Dopeoplewhochoosetogoonexotic,far-flungholidaysdeservefreehealthadvicebeforetheytravel?Andeveniftheypay,wh
A、overdrawanaccount.B、borrowfromherparents.C、workovertime.D、spendhersavings.A本题考查推测能力。对话快结束时,Victoria讲到她去见了银行经理,这个经
Inthepast______years,theeconomyhasbeengrowingowingtotaxcutsandFederalReserveinterestratecuts.
A、Sharon’sgovernmentaimedatalleviatinginternationalpressureonIsraelB、Sharon’sgovernmentfeltguiltyoftheirexcessive
______isgenerallyregardedasJohnSteinbeck’smasterpiece.
______isthelargest_______city.Ithasafinenaturalharbourandastrikingoperahouse,andonceheldtheOlympicGames.
Canadacomprises______provincesandthreeterritories.
随机试题
肺炎链球菌在临床上主要引起下列何种疾病
张某因为李某将自己殴打致伤而向公安机关控告,公安机关在了解了情况后,认为李某的行为不构成犯罪,不需要追究刑事责任,决定不予立案,并且将不立案的原因通知了张某。在该案中,张某可以进行以下哪种行为?()
直径为d的圆轴扭转如图所示,I-I横截面外表面某点K处的应力状态为()。
城市的商业用地结构中,不属于其组成的是()。
在17世纪后半叶,巴黎的城市改建体现了()带来的重大影响。
之所以认为法是一种特殊的社会规范,是因为它与道德存在着重要的区别。以下不是两者之间区别的是()
结合材料回答问题:材料1在几千年的历史发展中,中华民族创造了悠久灿烂的中华文明,为人类作出了卓越贡献,成为世界上伟大的民族。但是,近代以后,由于西方列强的入侵,由于封建统治的腐败,中国逐渐成为半殖民地半封建社会,山河破碎,生灵涂炭,中华
下列关于宽带城域网技术的描述中,错误的是()。
阅读下面程序publicclassIncrement} publicstaticvoidmain(Stringargs[]){ intc; c=5; System.out.println(C)
有以下程序:#include<stdio.h>inta=1,b=2;voidfun1(inta,intb){printf(″%d%d″,a,b);}voidfun2(){a=3;b=4;}voidmain(){fu
最新回复
(
0
)