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
公务员
Lonely people,it seems,are at greater risk than the gregarious of developing illnesses associated with chronic inflammation,such
Lonely people,it seems,are at greater risk than the gregarious of developing illnesses associated with chronic inflammation,such
admin
2020-03-28
20
问题
Lonely people,it seems,are at greater risk than the gregarious of developing illnesses associated with chronic inflammation,such as heart disease and certain cancers.A paper published last year in the Public Library of Science,Medicine,shows the effect on mortality of loneliness is comparable with that of smoking and drinking after examining the results of 148 previous studies and controlled for factors such as age and pre-existing illness.
Steven Cole of the University of California,Los Angeles,thinks he may know why this is so.He told the American Association for the Advancement of Science meeting in Washington,D.C.,about his work studying the expression of genes in lonely people.Dr.Cole harvested samples of white blood cells from both lonely and gregarious people.He then analysed the activity of their genes,as measured by the production of a substance called messenger RNA.This molecule carries instructions from the genes telling a cell which proteins to make.The level of messenger RNA from most genes was the same in both types of people.There were several dozen genes,however,that were less active in the lonely,and several dozen others that were more active.Moreover,both the less active and the more active gene types came from a small number of functional groups.
Broadly speaking,the genes less active in the lonely were those involved in staving off viral infections.Those that were more active were involved in protecting against bacteria.Dr.Cole suspects this could help explain not only why the lonely are iller,but how,in evolutionary terms,this odd state of affairs has come about.
The crucial bit of the puzzle is that viruses have to be caught from another infected individual and they are usually species-specific.Bacteria,in contrast,often just lurk in the environment,and may thrive on many hosts.The gregarious are therefore at greater risk than the lonely of catching viruses,and Dr.Cole thus suggests that past evolution has created a mechanism which causes white cells to respond appropriately.Conversely,the lonely are better off ramping up their protection against bacterial infection,which is a bigger relative risk to them.
What Dr.Cole seems to have revealed,then,is a mechanism by which social environment reaches inside a person’s body and tweaks its genome so that it responds appropriately.It is not that the lonely and the gregarious are genetically different from each other.Rather,their genes are regulated differently,according to how sociable an individual is.Dr.Cole thinks this regulation is part of a wider mechanism that tunes individuals to the circumstances they find themselves in.
Dr.Cole made an analysis of the activity of the genes by__________.
选项
A、measuring the level of messenger RNA
B、calculating the number of more active gene types
C、instructing the production of certain proteins
D、comparing less active genes with more active ones
答案
A
解析
细节题。根据题干信息定位到第二段的第三、四句。由这两句可知,Cole博士从孤独的人和爱交际的人那里收集了白细胞样本,然后靠测量一种叫作信使RNA的物质的数量分析他们基因的活性,或者说通过测量信使RNA的含量来分析基因活性,故A项符合题意,为正确答案。B、D两项在原文中没有提及,可排除。原文提到的是信使RNA携带者基因上的指令,这些指令告诉细胞生产哪类蛋白质,显然这是对信使RNA的介绍,并不是分析基因活性的方法,故C项“对生产某种蛋白质下达指令”错误。故本题选A。
转载请注明原文地址:https://kaotiyun.com/show/idkY777K
本试题收录于:
银保监法律类题库国家公务员分类
0
银保监法律类
国家公务员
相关试题推荐
2019年1月11日,习近平总书记在第十九届中央纪委三次全会上发表重要讲话,强调要加强党的建设,全面从严治党。下列关于习近平总书记对党的建设的表述,正确的是:()
履历分析又称资历评价技术,是通过对被评价者的个人背景、工作与生活经历进行分析,来判断其对未来岗位适应性的一种人才评估方法,是相对独立于心理测试技术、评价中心技术的一种独立的人才评估技术。根据上述定义,下列属于履历分析的是:()
当我们治理骚扰短信时,首先需要面对的问题是,我们在治理谁?对于短信内容提供者。他们的责任当然应该追究,但骚扰短信全面________,电信运营商在监管上失职,甚至私下串通、勾结(频繁曝出电信运营商地方分公司为垃圾短信发送提供便利)的责任也是________
习近平总书记在党的十九大报告中强调“房子是用来住的,不是用来炒的”。近年来,各级政府也在不断出台政策抑制房地产市场过热,房价增幅开始放缓,有些城市甚至出现房价下降的现象,这表明:()
下列情形符合法律规定的是:()
某公司有110人参加培训考核,考试内容为5道题,1~5题答对的人数分别为96人、78人、100人、87人、85人,答对4道题及以上的人员能通过培训考核,则至少有多少人通过考核?()
宏达公司的业绩比腾飞公司好。但是因为鹏程公司的业绩比天城公司的业绩好,所以宏达公司的业绩比天城公司好。以下除了哪项外,都可以成为题干成立的一个必要前提?
五十多年后回顾这段历史,杜老依然________,然而他也没有________土改实施过程中的缺陷,例如消灭富农和侵犯中农,以及没有严格依法保护劳动者财产利益。填入画横线部分最恰当的一项是:
一般来说,性别是与生俱来的,不是通过主动选择取得的。这是性别平等观念讨论的________,正因为人们无法选择性别、种族、肤色等先天性的条件,所以在这些领域开展权利平等运动才显得无比重要。人类的文明在于每个人拥有最基本的生存权和发展权。但在客观上,每个人的
Manypeoplethinkofinternalcontrolasameansofsafeguardingcashandpreventingfraud.Althoughinternalcontrolisanimpor
随机试题
文化杂交又称为()
混凝土建筑物立模细部轮廓点的放样位置,以距设计线()为宜。
在月末结账前发现所填制的记账凭证将科目方向记反,并已过账,按照有关规定,更正时应采用的错账更正方法最好是()。
在下列商品中,需求处于稳定形态的是()。
()等人在1993年提出了一个教师反思框架。
以下哪项属于义务教育阶段化学学业评价?()
下列作曲家来自意大利的有()。
由全国人大选举产生的国家领导人的人选是
在数据库管理系统的层次结构中,由低级到高级的层次排列顺序为
HowtoUsetheInternettoLearnaLanguage?Internethasmadecommunicationandlearningalanguagemuchmoreaccessible.Toma
最新回复
(
0
)