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 mouse’s immune system generally rejects proteins different from those produced by that mouse. The immune system of a pregnant
A mouse’s immune system generally rejects proteins different from those produced by that mouse. The immune system of a pregnant
admin
2022-09-28
67
问题
A mouse’s immune system generally rejects proteins different from those produced by that mouse. The immune system of a pregnant mouse does not, however, reject the mouse’s fetuses, although the fetal tissue a fetus produces as it develops typically contains many such proteins. Some scientists hypothesize that the placenta surrounding the fetus physically blocks the mother’s immune system. But others, noting that the placenta produces IDO, an enzyme that suppresses the immune system, hypothesize that IDO plays a crucial role in protecting the fetus.
In order to choose between the two hypotheses, it would be most useful to determine which of the following?
选项
A、Whether mice sometimes produce IDO when they are not pregnant
B、Whether the immune systems of fetal mice are capable of attacking the tissue of the mother
C、Whether there are cases in which the immune system of a pregnant mouse rejects some fetuses but not others
D、Whether IDO is the only substance capable of suppressing the immune system produced by mice
E、Whether the immune systems of pregnant mice that are given a drug that inhibits IDO production subsequently reject the fetus.
答案
E
解析
Yes:没有IDO→排斥胎儿→IDO起到保护作用;No:没有IDO→没排斥胎儿→胎盘起到保护作用。E选项回答Yes和No分别评价了两个假说,正确。A项和不怀孕的老鼠没关系。B项无关选项。C项无关选项。D项Yes:IDO是唯一一种物质→支持了IDO保护胎儿这一观点;No:IDO不是唯一一种物质→lDO和胎盘都会保护胎儿,那到底谁起到保护作用呢?该选项回答No无法起到评价作用,不选。
转载请注明原文地址:https://kaotiyun.com/show/UTVO777K
本试题收录于:
GRE VERBAL题库GRE分类
0
GRE VERBAL
GRE
相关试题推荐
Australianresearchershavediscoveredelectroreceptors(sensoryorgansdesignedtorespondtoelectricalfields)clusteredatthe
Virtuallyeverythingastronomersknownaboutobjectsoutsidethesolarsystemisbasedonthedetectionofphotons-quantaofele
Allofthecellsinaparticularplantstartoutwiththesamecomplementofgenes.Howthencanthesecellsdifferentiateandf
Untilrecently,scientistsdidnotknowofaclosevertebrateanaloguetotheextremeformofaltruismobservedineusocialinse
MudfromalakeonanuninhabitedwoodedislandinnorthernLakeSuperiorcontainstoxicchemicals,includingtoxaphene,abanne
Tocqueville,anineteenth-centurywriterknownforhisstudyofdemocracyintheUnitedStates,believedthatagovernmentthat
TheBusinessPermitOfficeinPlainsCountyclaimsthatithasreducedprocessingtimebyoneweekbyreplacingtheoldapplicat
Researchershavequestionedtheuseofcostlyandexperimentaldiagnostictesttoidentifyfoodallergies,suchasmilk,thatsu
Displaysoftheauroraborealis,or"northernlights,"canheattheatmosphereoverthearcticenoughtoaffectthetrajectories
随机试题
A.α波B.β波C.δ波D.θ波正常成年人睡眠状态下一般出现
铁路营业线临时道口应设置在嘹望条件良好的地点,且()。
我国最重要的行政主体是()。
从压力源到临床相的逻辑过程,可分为()。
小王根据某领导要求,要把一次会议记录的代表发言编发一期《会议简报札》,按照有关规定小王可采取的正确做法是()。
立案监督的内容是公安机关作出的立案决定。()
根据我国宪法规定,乡、镇一级的人民代表大会每届任期()。
马克思主义美学在探讨艺术的本质问题时,首先强调_______。
未来的中国,将是一个更加开放包容、文明和谐的国家。一个国家、一个民族,只有开放包容,才能发展进步。唯有开放,先进和有用的东西才能进得来;唯有包容,吸收借鉴优秀文化,才能使自己充实和强大起来。如果以上说法为真,以下哪项陈述一定为假?
Thereareabout105malesbornforevery100females,butthis【B1】______dropstonearbalanceattheageofmaturity,andamong
最新回复
(
0
)