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
49
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
TheHomesteadActof1862gavebeadsoffamiliesorindividualsagedtwenty-oneoroldertherighttoown160acresofpublicla
Thissummer,Texas’droughtofthecenturyisanuncomfortablereminderthatoftentherejustisn’tenoughwatertogoaround.B
Thissummer,Texas’droughtofthecenturyisanuncomfortablereminderthatoftentherejustisn’tenoughwatertogoaround.B
A、Theemployeemonitoring.B、ThecitizenshipinIllinois.C、Massmediapermits.D、Educationortrainingofemployees.A
A、Findwaystoreducethemedicalcosts.B、Teachpeoplehowtocarefortheirchildren.C、Helppatientstofindjobsafterthey
ForalmostsixyearsLyleCraker,aresearcherwhostudiesmedicinalplantsattheUniversityofMassachusetts,hasbeentrying
Labourisoftenaccusedofrushingthroughill-consideredlawswheneveritsappearanceofcompetenceiscracking.Themental-hea
Labourisoftenaccusedofrushingthroughill-consideredlawswheneveritsappearanceofcompetenceiscracking.Themental-hea
随机试题
供应链
《企业会计准则——应用指南》、《小企业会计制度》等属于典型的()
不属于“京派作家”的是()
当物业管理公司在内部要转发上级单位和不相隶属单位的公文、宣布实施某项制度、要求下级单位办理或通知事项、任免人员时,要使用()文种。
马斯洛提出人有七种基本需要,最高级的是______需要。
佛罗伦萨:意大利
下列关于恐龙的说法正确的是()。
党的十九大报告指出,全面依法治国是国家治理的一场深刻革命,必须坚持厉行法治,推进科学立法、严格执法、公正司法、全民守法。深化司法体制综合配套改革,全面落实司法责任制,努力让人民群众在每一个司法案件中感受到公平正义。其中,司法原则主要有
构建人类命运共同体思想既汲取了中华民族传统文化的精髓,又继承并创造性发展了马克思主义。构建人类命运共同体思想是一个科学完整、内涵丰富的思想体系,其核心是
HowwillthemangotoBeijingZoo?
最新回复
(
0
)