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
考研
How long you live has a lot to do with your environment and lifestyle, but exceptional longevity may have even more to do with y
How long you live has a lot to do with your environment and lifestyle, but exceptional longevity may have even more to do with y
admin
2019-09-30
66
问题
How long you live has a lot to do with your environment and lifestyle, but exceptional longevity may have even more to do with your genes. For the first time, researchers have identified a genetic recipe that accurately predicts who may live to 100 and beyond. Scientists led by Dr. Thomas Perls at the Boston University School of Medicine conducted a genetic analysis of more than 1,000 centenarians and their matched controls and found 150 genetic variants—or bits of DNA—that differed between the two groups. These variants identified people who lived to a very old age (past 100) with 77% accuracy, researchers found.
Further analysis identified 19 distinct genetic profiles associated with extremely long life; 90% of participants who lived to 100 possessed at least one of the signature genetic clusters. Each profile appeared to confer a different tendency to develop common age-related chronic diseases, such as heart disease or brain disorder. "We realize this is a complex genetic puzzle," Perls said. "We’re quite a ways away still in understanding how the integration of these genes—not just with themselves but with environmental factors—are playing a role in this longevity puzzle."
Perls has studied many factors that contribute to longevity, and he is the first to acknowledge that living longer isn’t likely to be simply a matter of genes. His previous work has shown, for example, that among most elderly people who live into their 70s and 80s, about 70% of their longevity can be ascribed to environmental factors such as not smoking; eating a healthy, low-fat, low-calorie diet; and remaining socially engaged and intellectually active throughout life.
Still, it seems clear that those who live to an exceptionally ripe old age are benefiting from a special DNA boost. In fact, Perls believes that the older a person gets, the more likely it is that his or her genes are contributing to those extended years. His current genetic findings support that theory: the 19 most common genetic profiles that distinguished the exceptionally long-lived appear to be correlated with lower incidence of certain diseases. For example, some profiles were associated with lower rates of high blood pressure and diabetes, while another was linked to a reduced risk of brain disorder.
Although most of us can’t expect to become centenarians, Perls is hoping that his work will lead to better ways—perhaps through pharmaceutical interventions based on the genetic clues to longevity—to help more of us live like them.
Which of the following is true according to Paragraph 2?
选项
A、Chronic diseases are complex genetic puzzles to scientists.
B、How exceptional longevity-related genes function is known.
C、Most centenarians have exceptional longevity-related genes.
D、The integration of genes and environmental factors is important.
答案
C
解析
推理判断题。第二段第一句后半部分提到,90%的特别长寿者都至少拥有一种与长寿有关的标志基因图谱.可见C项与之最为贴近。
转载请注明原文地址:https://kaotiyun.com/show/Ice4777K
0
考研英语二
相关试题推荐
Mobiletelecommunications______isexpectedtodoubleinShanghaithisyearasaresultofacontractsignedbetweenthetwoco
Asia’srealboat-rockerisagrowingChina,notJapan,aseniorAmericaneconomistobserved.Thereissomuchnoisesurround
Theroleofgovernmentsinenvironmentalmanagementisdifficultbutinescapable.Sometimes,thestatetriestomanagetheresou
Nameshavegainedincreasingimportanceinthecompetitiveworldofhighereducation.Ascollegesstriveformarketshare,they
Nameshavegainedincreasingimportanceinthecompetitiveworldofhighereducation.Ascollegesstriveformarketshare,they
FormostthinkerssincetheGreekphilosophers,itwasself-evidentthatthereissomethingcalledhumannature,somethingthat
TheDonaldTrumpadministrationannouncedThursdayanewplanaroundtheprotectionofendangeredspecies.Accordingtotheadmi
Thatmythicalbeast,homoeconomicus,otherwisecalledEconomicman,isutterlyclearaboutthepurposeofwork:togetpaid.He
Itseemstohappenwithdepressingfrequency—sunnyskiesturntorainjustastheweekendarrives.NowSpanishresearcherssayt
Neuroscientistshavelongunderstoodthatthebraincanrewireitselfinresponsetoexperience—aphenomenonknownasneuroplast
随机试题
热处理炉只能用热电偶测温。()
为什么管理者想要刺激某个群体或团队中的冲突?如何刺激冲突产生?
精癃好发于男性:
f(x)在点x0处的左、右极限存在且相等是f(x)在点x0处连续的:
案例:信息技术“幻灯片的超链接”这一堂课的教学目标是为幻灯片的文字按钮建立超链接,学生之前已经学习过在word中对文字建立超链接。张老师教学过程设计如下:①教师将幻灯片顺序混乱的PPT文件发放给学生,请学生在不改变现有顺序的情况下,根据目标页面调整幻灯
全国两会召开前夕,中共中央政治局常委、国务院总理温家~2011年2月27日上午来到中国政府网和新华网,与网友在线交流。温家宝强调,“十二五”期间,我们要使社会更加发展进步,使国计民生的一系列重大问题进一步得到改善,让人民生活得舒心、安心、放心,对未来有信心
下列说明了意识的本质的有()。
一位海关检查员认为,他在特殊工作经历中培养了一种特殊的技能,即能够准确地判定一个人是否在欺骗他。他的根据是,在海关通道执行公务时,短短的几句对话就能使他确定对方是否可疑:而在他认为可疑的人身上,无一例外地都查出了违禁物品。以下哪项如果为真,能削弱
【T1】______areactually【T2】______.Whiletheyare,perhaps,【T3】______tomeaningincommunicationinthesamewayasgrammaror
Ourape-menforefathershadnoobviousnaturalweaponsinthestruggleforsurvivalintheopen.Theyhadneitherthepowerfu
最新回复
(
0
)