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
What has cloning bypassed?
What has cloning bypassed?
admin
2010-06-30
58
问题
What has cloning bypassed?
What is cloning? Cloning is the creation of cells or whole animals using DNA from a single "parent", by passing the normal reproductive process. The clone has the same DNA as the parent.
The most common process takes DNA from one cell and puts it in a hollowed-out egg. Chemicals and electricity are then used to encourage the new DNA to fuse with the egg and develop into an embryo. This technique is called nuclear transfer.
The first cloned animal in human history is a sheep called Doily. It is very important because it was the first mammal to be cloned using DNA taken from an adult cell. Previously, animals had only been cloned using embryo cells, which already have the potential to become a complete embryo in its own right. The big breakthrough with Doily was to make a clone from an ordinary, adult cell.
When it comes to the question of whether cloned animals are normal and healthy, the answer is YES. Dolly is, but scientists do not yet know whether this is the exception or the rule. Some early evidence suggests that clones may have health problems and that they may age prematurely.
With the birth of Dolly; many people are worried that a human clone may be born soon. It’s possible in theory. But the technology of reproductive cloning is still in its very early stages and there is much that scientist do not understand. That’s more, human cloning is already banned by law in the United Kingdom. The former President of the United States Bill Clinton proposed banning research into producing human clones in the US for five years. Some measures have also been taken to establish international agreements banning live human clones.
选项
A、The nuclear transfer
B、The process taking DNA
C、The normal reproductive process
D、The creation of cells
答案
C
解析
克隆是个热门话题,有关克隆的文章无非谈论两种,一是克隆技术,二是是否要克隆人类。把握这个主要方向,理解文章内容就比较容易了。此题问的是克隆超越了什么步骤,关键是读懂题目,如果不明白bypass只好抓住文章中的信息了。较大的干扰项是the nuclear transfer。
转载请注明原文地址:https://kaotiyun.com/show/esJd777K
本试题收录于:
公共英语四级笔试题库公共英语(PETS)分类
0
公共英语四级笔试
公共英语(PETS)
相关试题推荐
Genetherapyandgenebaseddrugsaretwowayswecouldbenefitfromourgrowingmasteryofgeneticscience.Buttherewillbeo
Withunfamiliarhumanbeings,whenweacknowledgetheirhumanness,wemustavoidstaringatthem,andyetwemustalsoavoidign
RecentsurveysshowthatJapaneseyouthhavebecomea"MeGeneration"thatrejectstraditionalvalues."Around1980manyJap
RecentsurveysshowthatJapaneseyouthhavebecomea"MeGeneration"thatrejectstraditionalvalues."Around1980manyJap
Somemoderncitiesareusuallyfamousforpeoplewholiveaverylongtime.
Payandproductivity,itisgenerallyassumed,shouldberelated.Buttherelationshipseemstoweaken【C1】______peoplegetolder
HotelswereamongtheearliestfacilitiesthatboundtheUnitedStatestogether.Theywerebothcreaturesandcreatorsofcommun
Whathascloningbypassed?
humor本题也可以通过听前预测帮忙,既然前面是sarcasm,后面应该是某种修辞方法。综合而言,此题的答案比较容易写对,因为短文用了大量的主题句(topsentences),文章内容就非常清楚
Whatarefeelingsfor?Mostnonscientistswillfindthisastrangequestion.Feelingsjustifythemselves.Emotionsgivemeaning
随机试题
综述疼痛的护理措施。
只要是在同一个字符集下,文本的输出所使用的字符库都是相同的。()
Ifyou’redrivinginBrooklyn,Ohio,andfindyourselfattractedbyyoursurroundings,resisttheurgetogetholdofyourcell
诊断地中海贫血可采用
生长素的分泌部位在
A、“上以疗君亲之疾,下以救贫贱之厄”B、“若有疾厄来求救者,不得问其贵贱贫富、长幼妍媸、怨亲善友、华夷愚智,普同一等,皆如至亲之想;……”C、“病人对某些科学研究拒绝参加时,绝对不能使医生和病人之间的关系受到影响或妨碍”D、“我决
ρ为摩擦角,甲为斜面倾角,当()时,要维持滑块沿斜面等速下滑,水平力F为摩擦力。
()是指个人和家庭的收入主要来源于主动投资而不是被动工作。
根据下列资料,回答问题。2013年一季度国内生产总值118855亿元,按可比价格计算,同比增长7.7%。分产业看,第一产业增加值7427亿元,同比增长3.4%;第二产业增加值54569亿元,增长7.8%;第三产业增加值56859亿元,增长8.3%
通常,将软件产品从提出、实现、使用维护到停止使用退役的过程称为______。
最新回复
(
0
)