- 问题详情:人镰*型细胞贫血症是基因突变造成的,血红蛋白β链第6个氨基*的密码子由GAG变为GUG,导致编码的谷氨*被置换为缬氨*。下列相关叙述错误的是A.该突变改变了DNA碱基对内的*键数B.该突变引起了血红蛋白β链结构的改变C.在缺氧情况下患者的红细胞易破裂D.该病不属于染*体异常...
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- ThisyearI'mgoingtogethimagaggift.Afriendofhersgavethebride-to-besomecondomsasagaggift.There’salsoavinylrecordshop,EarCandy,andtheobligatorymusicandgaggiftstore,RockinRudy’s.Theticketswerecheapscratchers-agaggiftfromhissquashpartner-andSrivastavafo...
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- Richardmusthavethoughtcolleagueswereplayingagagonhim.TheGuardianhasvowedurgentlytogotocourttooverturnthegagonitsreporting....
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- 问题详情:一个转运RNA的一端3个碱基是AGA,此RNA运载的氨基*是A.谷氨*(GAG) B.丝氨*(UCU) C.精氨*(AGA) D.酪氨*(UAU)【回答】B知识点:基因的概念与表达题型:选择题...
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- Tokeep(themouth)openbyusingagag.Therobbersrammedthegaginhermouth.Theburglarsboundhimhandandfootandplacedagaginhismouth.Yourgagreflexisasoftpalateinthebackofyourthroat.Theodorcomingfromitisstrongenoughtogagyou.Theyassuredme,however,thatalumwasnotsuppo...
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- Onethirdofthepopulationdoesn’tevenhaveagagreflex!Yourgagreflexisasoftpalateinthebackofyourthroat.Butdon'tworry,swallowingaswordwholewon'tdestroyyourgagreflex.Spoton:Openyourmouth,stickyourtongueout,anduseatoothbrushoryourfingertofindexactlywhereyo...
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