首页
登录
职称英语
Research into DNA has had a significant impact on medicine. Through recombina
Research into DNA has had a significant impact on medicine. Through recombina
游客
2024-12-24
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 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. Strainsof 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 fights 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 Para 5-7(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/3882185.html
相关试题推荐
Inthelongest-termstudyofitskind,researcherspittedtwopopulardiets
Overthepastdecade,significantresearchhasdemonstratedwhatmanyhavek
Overthepastdecade,significantresearchhasdemonstratedwhatmanyhavek
Overthepastdecade,significantresearchhasdemonstratedwhatmanyhavek
Overthepastdecade,significantresearchhasdemonstratedwhatmanyhavek
Overthepastdecade,significantresearchhasdemonstratedwhatmanyhavek
Overthepastdecade,significantresearchhasdemonstratedwhatmanyhavek
Thewaveofjobcutssweepingthroughtheutilitysectorgatheredpaceyester
Thewaveofjobcutssweepingthroughtheutilitysectorgatheredpaceyester
ResearchintoDNAhashadasignificantimpactonmedicine.Throughrecombina
随机试题
Togetmytravellers’chequesIhadto_____aspecialchequetothebankforthet
所示结构中杆6的内力Nb应为下列何项数值?( ) A.Nb=0 B.Nb=
操作塔式起重机严禁()。A.拔桩 B.斜拉、斜吊 C.顶升时回转 D
导游讲解因人而异,因时制宜,因地制宜,体现了导游讲解的()A:计划性原则 B:
将甲、乙、丙三株大小相近的同种植株,分别进行如下表的处理,实验结果如下图所示。据
雕塑的基本形式分为浮雕、透雕和()。A.圆雕 B.木雕 C.石雕 D.
A. B. C. D.
血浆蛋白量显著减少时,可引起( )。A.血浆渗透压显著降低 B.组织液生成增
下列各项中,能够作为吸收直接投资出资方式的有( )。A.特许经营权 B.土地
(2017年真题)仅发生机械潜蚀的原因是()。A.渗流水力坡度小于临界水力
最新回复
(
0
)