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
2022-08-21
50
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
原文中提到,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/Kdx7777K
0
大学英语六级
相关试题推荐
A、Polishingtheirapplicationforms.B、Broadeningtheiroptionsofcolleges.C、Benefitingfromalow-costschool.D、Workinghard
A、10:30PM.B、11:00PM.C、11:30PM.D、12:00PM.D男士说,餐馆周末的营业时间一直到午夜,即12:00pm。故答案是D。关键是分辨weekdays和weekend的不同营业时间,做笔记时要迅速和完整地记下细节,例如:w
A、TheyaretheguidelinesforcooperationwiththeUSmilitary.B、TheyaredesignedtopromotefurtherdevelopmentofAItechnol
A、Itcanreducetheriskofheartdisease.B、Itcanimprovetheeffectofexercise.C、Itcanmakeusfeelhappy.D、Itcancures
A、Listeningtomusic.B、Readingbooks.C、Doingexercise.D、Exchangingfamilynews.B
A、HemisseshisflightB、Hecanfindagoodseat.C、Hecanleavetheairportfirst.D、Hisluggagecomesoutlast.C选项仍为某种人的遭遇。短文
A、Generatedifferentspeeches.B、Identifyobjectsinpictures.C、Improveroadconditions.D、Reproducehumanbrains.B录音提到,认知计算机系
A、Makeasmanyfriendsaspossible.B、Makefriendswithmultiple-typepeople.C、Neverbreakupwithyourbestfriends.D、Maketr
A、Tomaketheworldabetterplace.B、Towinthepresidency.C、Tobeaneducatedperson.D、Toupsetmorecelebratedrivals.A录音中
A、Researchasmanydifferentoptionsaspossible.B、Avoidgoingoverthesameoptionsrepeatedly.C、Focusonwhatispractical.
随机试题
可出现“银叉”畸形的骨折是
Rh阴性血又俗称熊猫血,它是指红细胞上缺乏
胰岛素的等电点为pH5.1~5.3,如将其水溶液DH调至5.1~5-3时会发生
胎儿窘迫的病因不包括
(2017年)甲礼花厂2017年6月发生如下业务:(1)委托乙厂加工一批焰火,甲厂提供原料成本37.5万元,当月乙厂将加工完毕的焰火交付甲厂,开具增值税专用发票,注明收取加工费5万元。(2)将委托加工收回的焰火60%用于销售,取得不含税销售额38万元,
住房保障
通常软件测试实施的步骤是()。
例如:小船上一河条有河上有一条小船。爸爸你吗身体好
Abovethetreesarethehills,______magnificencetheriverfaithfullyreflectsonthesurface.
WearehighintheBlueRidgeMountainsinthestateofNorthCarolina.Itisveryearlyinthemorning.Wehavebeen【C1】______
最新回复
(
0
)