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
A、It can stimulate four genes in the brain. B、It can make our body stronger. C、It can make human skin cells younger in the lab.
A、It can stimulate four genes in the brain. B、It can make our body stronger. C、It can make human skin cells younger in the lab.
admin
2021-09-29
23
问题
An end to grey hair and crows-feet could be just 10 years away after scientists showed it is possible to reverse ageing in animals.
Using a new technique which takes adult cells back to their embryonic form, US researchers at the Salk Institute in California, showed it was possible to reverse ageing in mice, allowing the animals to not only look younger, but live for 30% longer.
The technique involves stimulating four genes which are particularly active during development in the womb. It was also found to work to turn the clock back on human skin cells in the lab, making them look and behave younger.
Scientists hope to eventually create a drug which can mimic the effect of the found genes which could be taken to slow down, and even reverse the ageing process. They say it will take around 10 years to get to human trials.
"Obviously, mice are not humans and we know it will be much more complex to rejuvenate a person. But this study shows that ageing is a very dynamic and plastic process," said Dr. Juan Carlos Izpisua Belmonte, a professor in Salk’s Gene Expression Laboratory.
Scientists have known for some time that the four genes, which are known collectively as the Yamanaka factors, could turn adult cells back to their stem cell state, where they can grow into any part of the body. But it was always feared that allowing that to happen could damage organs made from the cells, and even trigger cancer.
However, it was discovered that stimulating the genes intermittently reversed ageing, without causing any damaging side effects.
In mice with a premature ageing disease, the treatment countered signs of ageing and increased their lifespan by 30%. If it worked similarly in humans it could allow people to live until more than 100 years old. In healthy mice it also helped damaged organs to heal faster.
Questions 23 to 25 are based on the recording you have just heard.
23.What did the research carried out by US researchers at the Salk Institute in California show?
24.What can we know about the new technique?
25.What is the potential risk of turning adult cells back to their stem cell state?
选项
A、It can stimulate four genes in the brain.
B、It can make our body stronger.
C、It can make human skin cells younger in the lab.
D、It can change genes in the womb.
答案
C
解析
讲座中提到,这项技术涉及刺激胎儿在子宫内成长的阶段里尤为活跃的四个基因。而且这项技术还被发现,在实验室中可以将人类的皮肤细胞进行逆转,让皮肤细胞看起来更年轻。因此答案为C)。
转载请注明原文地址:https://kaotiyun.com/show/vIx7777K
0
大学英语六级
相关试题推荐
在中国,数百万计的人通过网络视频直播(livestreaming)与世界分享他们的生活。网络视频直播并不是一个新概念。在中国,各种各样的在线直播应用程序层出不穷。这些应用程序也被用于商业目的,个人和公司都用它们来销售各种各样的产品。明星们也使用视频直播直
A、Tidalrestlessness.B、Historicalcontinuity.C、Heatandlight.D、Economicprosperity.A选项是一组名词。听力篇章接下来讲这三类人对纽约不同的贡献。对于commute
"Iwanttocriticizethesocialsystem,andtoshowitatwork,atitsmostintense."VirginiaWoolf’sprovocativestatementab
Discoveriesinscienceandtechnologyarethoughtby"untaughtminds"tocomeinblindingflashesorastheresultofdramatica
A、Theycontributedtothepopularityofskiingworldwide.B、Theyresultedinabrandnewstyleofskiingtechnique.C、Theypromot
A、Fewofuscanignorechangesinourimmediateenvironment.B、Itisimpossibleforustobeimmunefromoutsideinfluence.C、Fe
A、Pleasure.B、Company.C、Popularity.D、Emotionalfactors.D细节辨认题。讲座中明确提到。说到亲密的友谊时,女性指的是情感因素。因此答案为D)。
Humanmemoryisnotoriouslyunreliable.Evenpeoplewiththesharpestfacial-recognitionskillscanonlyremembersomuch.It
A、Therecentfindingofachangedgeneinobesemice.B、Thenewdevelopmentofgenesandhormones.C、Thesimilaritybetweenhuma
A、Itcostmuchless.B、Itwasnotaffectedbyweather.C、Itwassupportedbytheemperor.D、Itwasrelativelysafer.D
随机试题
关于委托专利代理机构办理专利事务,下列说法正确的是?
社会结构形式
(2007年)饱和蒸汽分别在形状、尺寸、温度都相同的A、B两个等温垂直壁面上凝结,其中A上面是珠状凝结,B板上是膜状凝结。若两个壁面上的凝结传热量分别为QA和QB,则()。
证券公司为满足承销股票、债券等特定业务的流动性资金需要,借入期限在()个月以上及2年以下(不含2年)的次级债务为短期次级债务。
李大钊撰写的中国第一部以唯物史观为指导的史学理论著作是()。
调整教师与物欲诱惑之间关系的道德规范是()。
()也称主动性,表现在学生能根据一定的目标或要求,自行采取相应的态度或行动。
社会生产总过程包括生产、分配、交换、消费四个环节,其中()。
在随机地抛掷两枚均匀骰子的独立重复试验中,求两枚骰子点数和为5的结果出现在它们的点数和为7的结果之前的概率。
某出版社的编辑小王手中有一篇有关财务软件应用的书稿“会计电算化节节高升.docx”,打开该文档,按下列要求帮助小王对书稿进行排版操作并按原文件名进行保存:在书稿中用红色标出的文字的适当位置,为前两个表格和前三个图片设置自动引用其题注号。为第2张表格“表
最新回复
(
0
)