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
2010-05-14
53
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 life 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.
The author wants to tell us in Para. 1-4______.
选项
A、DNA’ s functions
B、DNA’ s applications
C、DNA’ s research
D、DNA’ s techniques
答案
B
解析
前四段主要讲了DNA在医学、法律等方面的使用,故选B。
转载请注明原文地址:https://kaotiyun.com/show/ieqO777K
0
专业英语八级
相关试题推荐
Educationproponentsacrossthepoliticalspectrumweredismayedbyrecentattemptstoeradicatethesingle-genderoptionsinpu
Educationproponentsacrossthepoliticalspectrumweredismayedbyrecentattemptstoeradicatethesingle-genderoptionsinpu
A、Raisingtheoverallsalesofcomputers.B、Monitoringindecentphoneconversations.C、Ensuringthequalityofcustomerservice.
Somethingsarebestkeptsecret.Itishard,forinstance,toarguethatpublicinterestdictatespublishingtheblueprintsfor
A、She’smadeittothetopofEverest.B、She’sscaledthehighestmountaininAfrica.C、She’sraised$10mforeducationproject
Economicgrowthisup.Unemploymentisdown.Thehousingmarketisinrecovery.Sowhydidn’tPresidentObama’sStateoftheUni
Publicisinghisimminentnewseriesabouttheevolutionofanimals,SirDavidAttenboroughsaidthisweekthathethoughtaredu
A、It’stoofarawayfromthedowntownareaofSydney.B、Thewomanchangedhermindanddecidedtoliveindormsinstead.C、Hoste
A、Educationalestablishments.B、Powerstations.C、Recreationalfacilities.D、Guillotine.D
Labourisoftenaccusedofrushingthroughill-consideredlawswheneveritsappearanceofcompetenceiscracking.Themental-hea
随机试题
Everyhumanbeing,【C1】______whatheisdoing,givesoffbodyheat.Theusualproblemis【C2】______disposeofit.Butthedesign
就部位而言,体表属就部位而言,上部属
对氨基糖苷类不敏感的细菌是
解热镇痛药物解热作用主要的机制是()。
下列关于A公司的说法正确的是()。若在李某与A公司签订委托合同前,A公司的经纪人员为了得到这项业务而对李某作出一些口头承诺,但在所签委托合同中并未提及,经确认,A公司的行为给李某造成了预期利益损失,引起李某的争议。则下列说法正确的是()
分类分项工程量清单项目编码500101002001中的后三位001代表的含义是()。
下列关于中国茶文化表述正确的有()。
荷兰研究人员一直在试图模拟月球和火星的土壤条件进行农作物栽培实验。他们对该项实验种出的小红萝卜、豌豆、黑麦和西红柿进行初步分析。实验结果令人充满希望,这些产品不仅安全,而且可能比在地球土壤种出的农作物更健康。英国媒体称,能在火星土壤种出可食用作物,殖民火星
根据合同法规定,对于违反非金钱债务的,不能采用继续履行方式承担违约责任的情形是()。
•Youwillhearabusinesspresentation.•Asyoulisten,forquestions1—12,completethenotes,usinguptothreewords.•Youwi
最新回复
(
0
)