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
43
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
RecentsurveysshowthatJapaneseyouthhavebecomea"MeGeneration"thatrejectstraditionalvalues."Around1980manyJap
Somemoderncitiesareusuallyfamousforpeoplewholiveaverylongtime.
Somemoderncitiesareusuallyfamousforpeoplewholiveaverylongtime.
Payandproductivity,itisgenerallyassumed,shouldberelated.Buttherelationshipseemstoweaken【C1】______peoplegetolder
Payandproductivity,itisgenerallyassumed,shouldberelated.Buttherelationshipseemstoweaken【C1】______peoplegetolder
Averyimportantworldproblem—infact,Ithinkitmaybemostimportantofallthegreatworldproblemswhichfaceusatthepr
ThepagesoftheHarvardBusinessReviewarenotusuallypopulatedbynovelists.ButJosephFinderisjustsuchararity.Recent
12/twelve本题答案仍是在第三个话轮中男士的第三句话:...writetheSamenumberofbookreviews...,说明仍是写12篇书评。
______governmentssignedtheProgramofActionofICDC.
WhatwereMolly’sfeelingsastheywalkedhome?
随机试题
在社会主义制度下,积累基金主要用于()。
从公元1400年到1900年是第三个大的气候时期,竺可桢称此期为
A.5%B.15%C.20%D.40%E.60%正常人体血浆约占体重的
5A电流互感器电缆芯线截面积宜不小于下列何值?
()是银行发放贷款前最重要的一环,也是贷款发放后能否如数按期收回的关键。
在发生全球危机那样的极为紧急的时刻,投机活动猖獗,利率急剧上升,一切都变化不定,保护好自己的财产是至关重要的。管理和经济领域的专家认为:储蓄仍然是最安全的避难所,尽管收益非常低,但是把钱存起来实际上不会遇到风险。即使存款的银行破产,政府也保证归还储户一定数
∫χsinχdχ=().
依据《行政处罚法》规定,限制人身自由的行政处罚应由()。
已知13+23+33+…+n3=(1+2+3+…+n)2,问13+33+53+…+193=()。
新型工业化道路的主线是
最新回复
(
0
)