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title分子生物学(福建农林大学)中国大学mooc答案100分最新版content作业第三单元基因和染色体-2(基因概念的多样性)Chapter2GeneandChromosome_Homework1、请上传Chapter2GeneandChromosome上直播课和慕课过程中所记的笔记(可以是提纲式或是思维导图,需要记录重点和难点,特别要记录下英文PPT中的专业单词,笔记请纸质记录,拍照后上传)
要求:1.有章节题目;2.要点大纲;3.记录下重点难点;4.可以用思维导图式;5.记录下英文专业词汇;6.不能出现个人信息。
评分规则:
100-99:有章节题目和要点大纲,逻辑清楚,内容完整详细,重点难点突出,有记下英文专业词汇,且书写工整;90-89:有章节题目和要点大纲,逻辑清楚,内容完整,有重难点,但不突出,只有少数英文词汇;书写工整;80-79:有章节题目和要点大纲,逻辑清楚,但内容和重难点不够完整,没有英文词汇,书写不够工整;70-69:有章节题目,但是逻辑不清楚,但内容和重难点不够完整,没有英文词汇,书写不工整,版面很乱60:有交笔记,但是内容非常让人不满意。0:没有提交笔记第三单元基因和染色体-2(基因概念的多样性)Chapter2GeneandChromome_Test1、Watson&Crickwonthenobleprizein1962fortheirdiscoveriesconcerning:A:theinteractionbetweentumourvirusesandthegeneticmaterialofthecell
B:themobilegeneticelements
C:themolecularstructureofnucleicacids
D:theinventionofthePCRmethod
答案:themolecularstructureofnucleicacids2、Mostofthestabilityofthedouble-strandedDNAstructureistheresultofA:
hydrogenbondingbetweenpurines.
B:thephosphodiesterbackbone.
C:theangleoftheplanesofthebaseswithrespecttothehelixaxis.
D:thestackinginteractionsbetweenbasepair.
答案:thestackinginteractionsbetweenbasepair.3、ItiseasiertomeltDNAricherinATthanGCbecauseA:itismoreheatsensitive.
B:thereisonelesshydrogenbondinanATbasepair
C:
thehelixpitchislongerinATrichregions.
D:Allofthethreestatements.
答案:thereisonelesshydrogenbondinanATbasepair4、AsB-DNAisgraduallyheated,theabsorbanceat260nmA:increases.
B:decreases.
C:staysthesame.
D:
Itisunpredictable.
答案:increases.5、WhatarethetargetandtheprobeoftheSouthernblotting?A:DNA,DNA
B:RNA,RNA
C:Protein,antibody
D:
Noneoftheabove.
答案:DNA,DNA6、SupercoilingofpurecircularDNAisaresultof
__.
A:underwindingoroverwindingofthehelix
B:thelonglengthofthestrands
C:thelackofassociatedhistones
D:theactivityofexonucleases
答案:underwindingoroverwindingofthehelix7、Whichofthefollowingisanexampleofhighly-repetitiveDNA?A:Globingenefamily
B:Histonegenecluster
C:MinisatelliteDNA
D:rDNAgenefamily
答案:MinisatelliteDNA8、HistonesarefoundincloseassociationwithDNA.Whichofthefollowingstatementsisincorrect?A:Anucleosomecoreiscomposedof~146bpofDNAandahistoneoctamer.
B:HistoneH1binds
tolinkerDNA.
C:Thereareonlyfourtypesofhistones.
D:Nucleosomesareevenlydistributionwithinchromatin.
答案:Thereareonlyfourtypesofhistones.9、DNAwrapsaroundanoctamerofhistonestoformbead-likestructurescalled
__.A:nucleoids
B:nucleosomes
C:nucleoli
D:chromatids
答案:nucleosomes10、Whatistheapproximatediameterofachromatinfiber?A:3nm
B:30nm
C:300nm
D:3mm
答案:30nm11、Whatistheorderofpackagingofchromatinineukaryoticcellsfromsmallesttolargestsize?A:double-helix→solenoid螺线管→nucleosome→chromosome
B:double-helix→chromatin→solenoid→chromosome
C:single-strandedDNA→chromatin→histones→chromosome
D:double-helix→nucleosomes→solenoid→chromosome
答案:double-helix→nucleosomes→solenoid→chromosome12、HowmightmitochondrialDNAbedistinguishedfromeukaryoticnuclearDNA?A:MitochondrialDNAisintheZconformation,nuclearDNAisintheBconformation.
B:MitochondrialDNAismethylated,nuclearDNAisnot.
C:NuclearDNAislinear,mitochondrialDNAarecircular.
D:Theycannotbedistinguishedandmustbeclearlyseparateduringpurification
答案:NuclearDNAislinear,mitochondrialDNAarecircular.13、Whichofthefollowingstatementsisnotcorrectconcerningtotheprokaryoticgenomeandeukaryoticgenome?A:Therearemanynon-codingDNAsineukaryoticgenome.
B:DNAarealmostnakedinprokaryotes.
C:Therearemanyoperonsineukaryoticgenome.
D:ProkaryoticgenomeisasinglecircularDNAmolecule.
答案:Therearemanyoperonsineukaryoticgenome.14、WhichdoesnotapplytomostbacterialDNA?
A:Circular.
B:Relaxed.
C:Notpackedintonucleosomes.
D:Supercoiled.
答案:Relaxed.
15、Inanucleicacidmolecule,nucleotidesarejoinedintoapolymerbythe
__phosphodiesterbonds.A:2′,3′
B:2′,4′
C:3′,4′
D:3′,5′
答案:3′,5′16、AllgenomesarecomposedofDNA.
A:正确
B:错误
答案:错误17、Thetwostrandsofdouble-strandedDNAhavethesamecontentofeachofthebasesA,T,GandC.A:正确
B:错误
答案:错误18、Thesupercoilingofdouble-strandedcircularDNAcanberemovedbycleavingasinglephosphodiesterbondononlyonestrand(nick).
A:正确
B:错误
答案:正确19、ProkaryoticDNAisorganizedintoprotein-DNAstructurescallednucleoids.
A:正确
B:错误
答案:正确20、HistoneH1ispartofthehistoneoctamer.A:正确
B:错误
答案:错误21、Heterochromatinmakeupmostofthegenome.A:正确
B:错误
答案:错误22、ThemaximumC-valueisalwaysgreaterthanminimumC-valueinanorganism.A:正确
B:错误
答案:错误作业第四单元DNA的复制Chapter3DNAreplication-homework1、请上传Chapter3DNAreplication上直播课和慕课过程中所记的笔记(可以是提纲式或是思维导图,需要记录重点和难点,特别要记录下英文PPT中的专业单词,笔记请纸质记录,拍照后上传)
要求:1.有章节题目;2.要点大纲;3.记录下重点难点;4.可以用思维导图式;5.记录下英文专业词汇;6.不能出现个人信息。
评分规则:
100-90:有章节题目和要点大纲,逻辑清楚,内容完整详细,重点难点突出,有记下英文专业词汇,且书写工整;89-80:
有章节题目和要点大纲,逻辑清楚,内容完整,有重难点,但不突出,只有少数英文词汇;书写工整;79-70:有章节题目和要点大纲,逻辑清楚,但内容和重难点不够完整,没有英文词汇,书写不够工整;69-61:有章节题目,但是逻辑不清楚,但内容和重难点不够完整,没有英文词汇,书写不工整,版面很乱60:有交笔记,但是内容非常让人不满意。0:没有提交笔记第四单元DNA的复制Chapter3DNAreplication-test1、AllofthefollowingstatementsaboutDNAreplicationinprokaryotesaretrueexcept:A:DNAreplicationisconservative.
B:DNAsynthesisoccursinthe5’to3’direction.
C:Requiresa3’OHtoinitiatereplicationwhichisprovidedbyanRNAprimer.
D:
DNAreplicationinitiatefromspecificorigin.
答案:DNAreplicationisconservative.2、E.coliisgrownonamediumcontaining15Nforalongtime.Cellswerethentransferredtomediumcontainingonlynormal14N.DNAsampleswereobtainedforanalysisafterthreeroundsofreplicationandcentrifugedonadensitygradient.Howmanybandscanwesee?A:OnewithDNAcontainingboth15Nand14N.
B:Two,onewithDNAcontainingonly15NandonewithDNAcontainingonly14N.
C:Two,onewithDNAcontainingboth15Nand14NandonewithDNAcontainingonly14N.
D:Three,onewithDNAcontainingonly15N,onewithDNAcontainingboth15Nand14NandonewithDNAcontainingonly14N.
答案:Two,onewithDNAcontainingboth15Nand14NandonewithDNAcontainingonly14N.3、WhichDNApolymeraseismostresponsibleforchainelongationinE.coli?
A:DNApolymeraseI.
B:
DNApolymeraseII.
C:DNApolymeraseIII.
D:DNApolymeraseIV.
答案:DNApolymeraseIII.
4、The3′→5′exonucleaseactivityofE.coliDNApolymeraseIIIaccountsforthe
__ofpolymerization.
A:lowerrorrate
B:
highspeed
C:directionality
D:Alloftheabove
答案:lowerrorrate5、TheelongationofthelaggingstrandduringDNAsynthesis:A:Inthe3’
to5’direction
B:ProducesOkazakifragments
C:Polymerizesinthedirectionofforkmovement
D:Doesnotrequireatemplatestrand
答案:ProducesOkazakifragments
6、
InE.coli,theRNAprimeratthebeginningofeachOkazakifragmentisremovedbyA:DNApolymeraseI.
B:DNApolymeraseII.
C:DNApolymeraseIII.
D:
DNApolymeraseV.
答案:DNApolymeraseI.7、OkazakifragmentsareA:thesmallestsubunitsofDNApolymeraseIII
B:shortstretchesofDNAformedonthelaggingstrand
C:shortRNAprimersneededforinitiationofpolymerization
D:fragmentsofDNApolymeraseIthatlack5′→3′exonucleaseactivity
答案:shortstretchesofDNAformedonthelaggingstrand
8、Fragmentsonthelaggingstrandarejoinedbytheenzyme
__.A:DNApolymeraseI
B:DNAsynthase
C:DNAprimosome
D:DNAligase
答案:DNAligase
9、Whichproteinsareresponsiblefortheunwindingofthedouble-strandedDNAduringreplication?A:Ligases.
B:Helicases.
C:Topoisomerases.
D:Primases.
答案:Helicases.10、
InE.coli,
__helpsregulatethefrequencyofDNAreplication.A:DnaA
B:DnaB
C:Tus
D:RecA
答案:DnaA11、WhatisthefunctionofDNAtopoisomerases?A:
CleavingnucleotidesfromtheendsofDNA.
B:Addingorremovingsupercoils.
C:Methylationofthenitrogenousbases.
D:Methylationofthenitrogenousbases.
答案:Addingorremovingsupercoils.
12、AmajordifferencebetweenprokaryoticandeukaryoticDNAreplicationmechanismsisA:noOkazakifragmentsaremadeineukaryotes.
B:bothleadingandlaggingstrandsarecontinuousineukaryotes.
C:noprimersynthesisisneededineukaryotes.
D:thereplicationforkmovesslowerineukaryotes.
答案:thereplicationforkmovesslowerineukaryotes.13、
FunctionsofDNApolymerasesandaccessoryproteinsineukaryoticDNAreplicationincludeA:PCNAprotein,aslidingclampunitforDNA.
B:
DNApolymeraseα,initiation
thesynthesisofnewstrands.
C:RPAprotein,andequivalentofSSBproteinsinbacteria.
D:Alloftheabove.
答案:Alloftheabove.
14、DNAreplicationineukaryotes:A:usuallystartsatthesameplaceeverytime
B:onlyinvolve2differentDNApolymerases
C:isfasterthaninbacterialDNAreplication
D:alloftheabovearefalse
答案:alloftheabovearefalse15、Whichofthefollowingaretrue
statementsregardingtelomeres:A:theyconsistofashortrepeatingsequence
B:theyareprimarilyineukaryotes
C:theyarelocatedatchromosomeendsandstabilizelinearchromosomes
D:
alloftheabove
答案:
alloftheabove16、Telomerase
isakindof:A:RNApolymerase
B:DNApolymerase
C:
primase
D:reverse
transcriptase
答案:reverse
transcriptase17、ThemethylationofGATCsequencesinE.coli
A:isperformedbythedammethylase
B:isdelayedfor~10minafterDNAsynthesis
C:
isrelatedtotheinitiationofDNAreplication.
D:alloftheabove
答案:alloftheabo
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