首页
登录
职称英语
Research into DNA has had a significant impact on medicine. Through recombinan
Research into DNA has had a significant impact on medicine. Through recombinan
游客
2025-01-01
32
管理
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. [br] 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://tihaiku.com/zcyy/3893599.html
相关试题推荐
Howwasitpossible,Iaskedmyself,towalkforanhourthroughthewoodsa
Criticismofresearchlaysasignificantfoundationforfutureinvestigative
Criticismofresearchlaysasignificantfoundationforfutureinvestigative
HowMarketLeadersKeepTheirEdgeResearchfindsthatthere
HowMarketLeadersKeepTheirEdgeResearchfindsthatthere
HowMarketLeadersKeepTheirEdgeResearchfindsthatthere
HowMarketLeadersKeepTheirEdgeResearchfindsthatthere
OnewetnightIwascominghomethroughHydeParkfromworkinglateonajob
Ateamofinternationalresearchershasfoundnewevidencethatanendangered
Ateamofinternationalresearchershasfoundnewevidencethatanendangered
随机试题
Childrenmodelthemselveslargelyontheirparents.Theydosomainlythroug
Throughoutthepastcenturyhumanitydideverythinginitspowertocontrol
ItwastheEnglishscientist-philosopherFrancisBaconwhosaid,"Knowledgei
身体受到伤害要求赔偿的诉讼时效期间是()A.6个月 B.1年 C.2
气体放电灯的频闪效应对视觉有影响的场所,采用电感镇流器时,相邻灯具应分接在不同相
阅读下列材料: 算法与程序设计的复习课上,胡老师问学生计算机解决问题的步骤,有
在OSI模型中,衔接资源子网和通信子网的是()A.网络层 B.传输层 C
债券按利率是否固定分类,可以分为()。A.公募债和私募债 B.固定利率债
(2017年5月)外部招募的不足表现在()A.筛选难度大 B.进入角色慢
A.环境因素发生变化,导致病因比重增加 B.病因、宿主、环境三要素保持动态平衡
最新回复
(
0
)