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
2023-12-19
25
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. 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 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/3285782.html
相关试题推荐
Someconsumerresearchersdistinguishbetween"rational"motivesand"emotio
Whatimpactcanmobilephoneshaveontheirusers’health?Manypeopleworry
Inhisresearch,whatdidPeterWilliamsfindabouttraininginsmallfirms?[br
Inhisresearch,whatdidPeterWilliamsfindabouttraininginsmallfirms?[br
Inhisresearch,whatdidPeterWilliamsfindabouttraininginsmallfirms?[br
Inhisresearch,whatdidPeterWilliamsfindabouttraininginsmallfirms?[or
WhichuniversityofferscoursesthroughoneoftheB.B.C’stelevisionchannel?A、
Howcouldtheresearchersexplorethemummynow?[audioFiles]audio_ezem_026(2009
Cultureshockisapainfulexperiencewegothroughwhenweencountermanyn
Cultureshockisapainfulexperiencewegothroughwhenweencountermanyn
随机试题
Somesayitisevidentthatcomputerscandamageaperson’seyesight.Since
袁良是一位65岁的退休中学生物教师。从1984年起他开始对天津地区的鸟类资源进行统计。天津是中国北方最大的港口城市,东临渤海湾,北部有燕山山脉,东北部有
OnSaturday,BexarCountyDigitalLibrary—a$2.4million,4,000-square-foot
[originaltext](16)TheUShousingsectorusuallyleadstherestoftheecon
我们在与父母、同学、老师交往过程中,应该做到“己所不欲,勿施于人。”这是《论语》
EPCM是指EPC总承包商负责建设项目的(),并负责工程施工的管理。A:制造
Thechangeinthatvillagewasmiraculou
2014年末,某省公路里程172167公里,同比增长2.8%,其中,高速公路42
(2021年真题)根据医疗器械分类管理规定,下列属于二类医疗器械的是A.体温计、
急性化脓性腹膜炎的手术指征中,哪一项是错误的 A.继发性腹膜炎无局限趋
最新回复
(
0
)