生物化学练习题rna的转录Biochemistry exercisestranscription of RNA.docx
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生物化学练习题rna的转录Biochemistry exercisestranscription of RNA.docx
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生物化学练习题rna的转录BiochemistryexercisestranscriptionofRNA
生物化学练习题——rna的转录(Biochemistryexercises--transcriptionofRNA)
Biochemistryexercises-transcriptionofRNA(DanXuanti)
1.,thedescriptionoftheRNApolymeraseisincorrect
A.consistsofcoreenzymesandsigmafactors
TheB.coreenzymeconsistsofalpha2betabeta
ThedifferencebetweenC.holoenzymeandcoreenzymeistheexistenceofbetasubunit
D.holoenzymeincludessigmafactor
E.sigmafactorisonlyrelatedtotranscriptioninitiation
2.theprocessofsynthesizingDNAwithRNAastemplate
A.DNAtotalretentionreplicationmechanism
B.DNA'smechanismofsemiretainedreplication
SemidiscontinuousreplicationofC.DNA
FulldiscontinuousreplicationofD.DNA
E.reversetranscription
3.usingRNAastemplate,theenzymethatcatalyzesthesynthesisofcDNA'sfirststrandis
A.reversetranscriptase
B.telomerase
C.terminaltransferase
D.retrovirus
E.phagevirus
4.,aboutthereversetranscriptasestatement,theerroristhat
A.actsasthefourtypeofdNTP
B.catalyzedhydrolysisofRNA
C.synthesisdirection3'-5'
DNAwassynthesizedbyD.catalyzedbyRNA
E.canformintermediateproductsofDNA-RNAhybrids
5.inDNAbiosynthesis,theDNAPolymerizationCatalyzedbyRNA,RNAhydrolysisandDNAguidedDNApolymerization,thethreefunctionsoftheenzymeare
A.DNApolymerase
B.RNApolymerase
C.reversetranscriptase
D.DNAhydrolase
E.ligase
6..TheproductoftranscriptioncatalyzedbyRNApolymeraseIIIineukaryoticcellsis
A.hnRNA
b.trna
CmRNA
d.u4,u5snrna
e.5.8s,18S,28srrna前体
7。
真核细胞中经RNA聚合酶我催化转录的产物是
a.hnrna
b.trna
c.5srrna
d.u4,u5snrna
e.5.8s,18S,28srrna前体
8。
转录过程中需要的酶是
DNA指导的DNA聚合酶
B.核酸酶
c.rna指导的RNA聚合酶Ⅱ
d.dna指导的RNA聚合酶
e.rna指导的DNA聚合酶
9。
下列关于rRNA的叙述错误的是
A.原核rRNA由RNA聚合酶催化合成
B.真核rRNA由RNA聚合酶Ⅲ转录合成
c.rrna转录后需进行甲基化修饰
D.染色体DNA中rRNA基因为多拷贝的
e.rrna占细胞RNA总量的80%~85%
10。
下列关于σ因子的叙述正确的是
A.参与识别DNA模板上转录RNA的特殊起始点
B.参与识别DNA模板上的终止信号
C.催化RNA链的双向聚合反应
D.是-种小分子的有机化合物
E.参与逆转录过程
11的转录的酶是催化真核mRNA。
我a.rna聚合酶
b.mtrna聚合酶
c.rna聚合酶Ⅲ
d.rna复制酶
e.rna聚合酶Ⅱ
12转录的酶是催化原核mRNA。
A.
RNAreplicationenzyme
B.RNApolymerase
C.DNApolymerase
D.RNApolymeraseII
E.RNApolymeraseI
13.enzymesthatcatalyzeeukaryotictRNAtranscriptionare
A.RNApolymeraseI
B.DNApolymerase
C.RNApolymeraseII
D.RNAreplicationenzyme
NomorethanE.
14.theproductofeukaryoticRNApolymeraseIIinnucleartranscriptionis
A.hnRNA
B.mitochondrialRNAs
C.U6snRNAprecursor,5SrRNAprecursor
D.5.8S,28SrRNAprecursors
E.ScRNA
15.RNApolymeraseisasubunitthatpromotestheformationoftwoesterbondsofphosphate
A.prokaryoticRNApolymerasesubunitDelta
B.prokaryoticRNApolymerasesubunitalpha
C.prokaryoticRNApolymerasesubunitbeta
D.prokaryoticRNApolymerasesubunitbeta
E.prokaryoticRNApolymerasesubunitSigma
Thesubunitofthetranscriptioninitiationsiteinthe16.RNApolymeraseidentifiesthetemplate
A.prokaryoticRNApolymerasesubunitDelta
B.prokaryoticRNApolymerasesubunitalpha
C.prokaryoticRNApolymerasesubunitbeta
D.prokaryoticRNApolymerasesubunitbeta
E.prokaryoticRNApolymerasesubunitSigma
17.whichofthefollowingstatementsabouttheactionofreversetranscriptaseiswrong?
A.usesRNAastemplatetosynthesizeDNA
B.needsaprimerwith3'-OH
TheelongationofC.catalyzedchainis3-5
TheD.substrateisfourdNTP
E.requiresMg2+orMn2+
Eighteen
ThebasesequenceofDNAis5'ACTAGTCAG3',andthecorrespondingbasesequenceaftertranscriptionismRNA
A.5'-TGATCAGTC-3'
B.5'-UGAUCAGUC-3'
C.5'-CUGACUAGU-3'
D.5'-CTGACTAGT-3'
E.5'-CAGCUGACU-3'
19.,thereisaDNAfragment,anditsorderis3......ATTCAG......5',thetranscriptionproceedsfromlefttoright,andthesequenceofRNAgeneratedshouldbe
A.5'......GACUUA......3."
B.5'......AUUCAG......3."
C.5'......UAAGUC......3."
D.5'......CTGAAT......3."
E.5'......ATTCAG......3."
20.whichofthefollowingstatementsaboutDNAsynthesisdirectedbyRNAiswrong?
A.onlywhenDNAispresent,theRNApolymerasecancatalyzetheformationofthetwophosphatebond
InB.transcription,RNApolymeraserequiresprimers
ThesynthesisdirectionofC.RNAchainsisfrom5'to3'
D.inmostcases,onlyoneDNAisusedasatemplateforRNA
RNAchainssynthesizedbyE.havenoring
21.theRNApolymerasedirectedbyprokaryotesDNAconsistsofseveralsubunitswhosecoreenzymesarecomposedof
A.alpha2betabeta'
B.alpha2,betabeta1sigma
C.alphabeta
D.alphabeta
E.alphabeta
22.whichofthefollowingistrueaboutthesigmafactordescription?
SubunitsoftheA.RNApolymeraseareresponsibleforidentifyingspecificstartingpointsfortranscriptionofRNAontheDNAtemplate
B.
SubunitsoftheDNApolymerasecanbesynthesizedinthedirectionof5'-3'and'3'-'5'
TheC.ribosomalsubunit50S,catalyzedpeptidebondformation
ThemRNAribosomal30SsubunitisboundtoD.
E.isthebridgebetween50Sand30Ssubunitsthatmakeupthe70Snucleoprotein
23.whichofthefollowingistrueaboutthedescriptionoftheRNApolymeraseandDNApolymerase?
A.synthesisofpolynucleotidechainsusingnucleosidetwophosphate
TheB.RNApolymeraserequiresprimersandaddsbasesattheendoftheextendedpolynucleotidechain5'-'
TheC.DNApolymerasecansimultaneouslyaddnucleotidestotheendsofthechain
D.DNApolymerasecanonlysynthesizeDNAwithRNAastemplate
TheE.RNApolymeraseandDNApolymerasecanonlyaddnucleotidestothe3'-OHterminusofthepolynucleotidechain
Therearemanysimilaritiesanddifferencesbetweenthe24.DNAreplicationandtranscriptionprocesses.WhichofthefollowingdescriptionofDNAreplicationandtranscriptioniswrong?
A.hasonlyonestrandofDNAtranscribedinthebody,andthetwostrandsofDNAarecopied
B.inthesetwoprocesses,thesynthesisdirectionis5'-3'
TheproductofC.replicationisusuallylargerthantheproductoftranscription
D.tworequiresRNAasprimer
BothE.DNApolymeraseIandRNApolymeraserequireMg2+
Therearemanysimilaritiesanddifferencesbetweentheprocessof25.DNAreplicationandtranscription
A.transcriptionisonlyonestrandofDNAasatemplate,whiletwoDNAchainscanbeusedastemplatechainsduringreplication
ThesynthesisdirectionofB.inreplicationandtranscriptionis5'-3'
TheproductofC.replicationisusuallylargerthanthetranscript
D.
RNAprimerswererequiredforthetwoprocess
TheE.twoprocessrequiresbothpolymeraseandmultipleproteinfactors
26.matureeukaryotes,mRNA5,have
A.polyA
B.capstructure
C.polyC
D.polyG
E.polyU
27.theDNAbindingproteintranscribedfromtheinitialbacterialgeneisknownas:
A.enhancer
B.promoter
C.repressor
D.sigmafactor
RhofactorE.
Inthe28.DNAdoublestrand,thechainthatdirectsthesynthesisofRNAiscalled
A.codingchain
B.meaningfulchain
C.templatechain
D.noncodingstrand
E.ormoreiswrong
29.belowthedescriptionoftRNAsynthesis,theerroris
A.RNApolymeraseIIIparticipatesinthegenerationoftRNAprecursors
TheB.tRNAprecursoractstoremoveexcessnucleotidesattheendsof'5'and'3'undertheactionofenzymes
TheC.tRNAprecursorcontainsintrons
D.tRNA3endswithACC-OH
E.tRNAprecursorsalsorequirechemicalmodification
30.thefollowingstatementaboutthetranscriptionterminatoriscorrect
A.isterminatedbyterminationfactorRF
TheterminationsignalofB.DNAchaincontainsGCenrichmentareaandAAenrichmentarea,
TheC.terminationsignalcontainsGCenrichmentzoneandATenrichmentzone
D.needterminationsignalpfactorassistedrecognition
NoneoftheabovedescriptioniscorrectinE.
31.,thefollowingdescriptionoftheposttranscriptionalprocessingofmRNAiswrong
A.mRNAprecursorsneed5m7GpppNmphatsattheend
B.
MRNAprecursorsneedsplicing
C.mRNAprecursorinthe3'endwithpolyUtail
D.mRNAprecursorsrequiremethylationmodification
E.somemRNAprecursorsneedtobeedited
Thestructuredescriptionofthefollowing32.RNAtranscriptionterminatoriscorrect
A.isterminatedbyterminationfactorRF
TheterminationsignalontheB.DNAchaincontainsasectionofGCenrichmentzoneandAAenrichmentzone
TheC.terminationsignalcontainsGCenrichmentzoneandATenrichmentzone
TheD.terminationsignalrequiressfactorassistedidentification
ThedescriptionaboveE.isnotcorrect
Thetranscriptionprocessof33.RNAisdividedinto
A.unwinding,initiation,elongationandterminationofchains
Initiation,elongation,andterminationofB.transcription
C.nuclearproteincycleinitiation,peptideelongationandtermination
D.RNAsplicingandsplicing,terminaladditionofnucleotides,modifications,andRNAediting
NomorethanE.
34.thedirectionofthesynthesisofthenucleotidechaininvivois
A.3'-5'
B.CtoN
C.NtoC
D.5'-3'
E.canbefrom3to5,andfrom5to3
35.matureeukaryotes,mRNA5,endupwith
A.polyAhat
B.m7UpppNmP
C.m7CpppNmP
D.m7ApppNmP
E.m7GpppNmP
36.,the5'endprocessingprocessrequiredforprokaryoticmRNAtranscriptionis
Awithahat
B.polyAtail
C.cuttingandsplicing
D.RNAeditor
E.
Withouthat
37.compareRNAtranscriptionwithDNAreplication
A.rawmaterialsaredNTP
B.iscarriedoutinthenucleus
C.synthesisproductsneedsplicingprocessing
ThebasepairingbetweenD.andtemplatechainwasA-T
PrimersarerequiredforinitiationofE.synthesis
38.intronmeans
A.sequencesthatarenottranscribed
B.codingsequence
C.sequencestobetranslated
ThesequenceofD.transcribed
NomorethanE.
39.exonrefersto
ThespacerintheA.DNAchain
B.encodedsequencestobetranslated
C.sequencesthatarenottranslated
D.sequencesthata
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