MedicalBiochemistry智慧樹知到期末考試答案+章節答案2024年溫州醫科大學Whichproteinlevelwillobviouslydecreasebecauseoftheliverdamage?（）

答案:AlbuminAllofthefollowingaretrueforbothDNApolymeraseandRNApolymeraseEXCEPT（）.

答案:bothrequireaprimerThebasesofRNAarethesameasthoseofDNAwiththeexceptionthatRNAcontains（）.

答案:uracilinsteadofthymineThemostimportantkeyenzymeinglycolysisis（）.

答案:phosphofructokinase-1WhichofthefollowingsequencesiscomplementarytotheDNAsequence5'-AAGTCCGA-3'?（）

答案:3'-TTCAGGCT-5'Whichofthefollowingaminoacidresiduescanbephosphorylated?（）

答案:SerSubstratelevelphosphorylationoccursinwhichofthefollowingreactions?（）

答案:Succinyl-CoA→succinateThechemiosmotichypothesisforoxidativephosphorylationproposesthatthedrivingforcefortheformationofATPis（）

答案:aprotongradientacrossthemitochondrialmembraneThecoenzymeofALAsynthaseistheactiveformof（）

答案:VitB6InRNApolymeraseofE.coli,thesubunitwhichcanrecognizetheoriginoftranscriptionis（）.

答案:σsubunitWhichofthefollowingstatementsmostcloselydescribesthephenomenonofuncouplinginoxidativephosphorylation?（）

答案:ATPformationceases,butoxygenconsumptioncontinuesAllofthefollowingenzymesarelinkedtothereductionofNADHEXCEPT（）.

答案:succinatedehydrogenaseWhichbilepigmentcaneasilygothroughthebiomembrane?（）

答案:FreebilirubinWhatistheenzymecatalyzed2,3-BPGtoform2,3-BPG?（）

答案:BisphosphoglycerasemutaseFMNistheactiveformof（）.

答案:RiboflavinWhatisthemaintransportationformofbilirubininserum?（）

答案:Bilirubin-AlbuminPost-translationalmodificationsofpolypeptidesincludeallthefollowingEXCEPT（）.

答案:cappingby7-methylguanidineWhichstatementabouttheCoricycleisTRUE?（）

答案:Lactateisproducedbyskeletalmuscleandtransportedtotheliverwhereitisutilizedasagluconeogenicsubstrate.AllofthefollowingstatementsaboutDNAreplicationinprokaryotesaretrueEXCEPTwhichone?（）

答案:OkazakifragmentsarejoinedbyDNApolymeraseIIIWhichofthefollowingvitamindeficienciescancauseberiberi?（）

答案:VitaminB1IfthebasesequenceinafragmentofthecodingstrandofDNAis5′-ACTACTCAG-3′,correspondingsequenceofmRNAproducedbytranscriptionis（）.

答案:5′-CUGAGUAGU-3′When[S]=4Km,thevelocityoftheenzymaticreactionisabout（）.

答案:0.8VmaxWhichfollowingcanfeedbackinhibitALAsynthase?（）

答案:HemeExportofacetyl-CoAfrommitochondriatocytosoltoparticipateinfattyacidorsteroidbiosynthesisinvolves（）

答案:transportofcitratefrommitochondria.Thearrangementofatomsonthebackboneofthepolypeptidechaincanbeexpressedas（）.

答案:-C-N-C-C-ThemaximalabsorptionpeakofnucleicacidtoUVlightisat（）

答案:260nmTheeffectofcompetitiveinhibitoronenzyme-catalyzedvelocityis（）.

答案:Kmincreased,VmaxunchangedWhichofthefollowingcanresultsintheframeshiftmutationofDNA?（）

答案:thedeletionofonebaseinDNADuringeukaryoticDNAreplication,theenzymethatcatalyzethesynthesisoflaggingstrandis（）

答案:PolδIntheelectrontransportschemebelow,whichelectroncarrierismissing?（）NADHFMNH2?cytochromesO2

答案:UbiquinonePromoterisdefinedas（）

答案:aregionofDNAtemplatewhichRNA-polbindstoThemostcommondonorofmethylgroupsinbiosyntheticreactionsis（）

答案:S-adenosylmethionine(SAM)Thephenomenonwhichasingleaminoacidiscodedforbyseveraldifferenttripletcodonsiscalled（）ofgeneticcodons.

答案:degeneracyATPisdirectlyrequiredinproteinbiosynthesisfor（）.

答案:theformationofaminoacyl-AMPWhichofthefollowingstateispositivenitrogenbalance?（）

答案:pregnantwomenWhichtypeofthefollowinghistonesisnotacomponentinthecoreparticlesofthenucleosome?（）

答案:H1.Whichgroupofaminoacidshasonlyonegeneticcodencorrespondingly?（）

答案:Tryptophan,MethionineThedirectprecursorofdTMPsynthesisis（）.

答案:dUMPWhichoneofthefollowingenzymesdeficiencycanleadtoLesch-Nyhansyndrome?（）

答案:HGPRTThemostimportantchemicalbondthatmaintainaprotein'sprimarystructureis（）.

答案:saltbondOkazakifragmentsare（）

答案:foundonthelaggingstrandWhichoneofthefollowingistrueaboutdenaturedproteins?（）

答案:Biologicalactivitydecreases.Gluconeogenesistakesplacepredominantlyin（）.

答案:liverAllofthefollowingstatementsaboutallostericenzymesaretrueEXCEPT（）.

答案:theapparentKmofanenzymeforitssubstrateisusuallyincreasedbyapositiveallostericmodulator.Whichofthefollowingisnotthedirectmaterialofdenovosynthesisofpurinenucleotide?（）.

答案:GlutamateWhichoneofthefollowingstatementsiswrong?（）

答案:Thebodycansynthesizealltheaminoacidsthatmakeupproteins.Thetypeofnucleicacidthatusuallycontainssmallquantitiesofavarietyofmodifiedribonucleotides,suchaspseudouridineandinosine,is（）.

答案:transferRNA.Whatisthefecalcolorofthepatientswithobstructivejaundice?（）

答案:Kaolin-likecolorThecauseofthebilirubinintheurineis（）

答案:IncreaseoftheconjugatedbilirubininthebloodXerodermapigmentosumresultsfromadeficiencyin（）

答案:DNArepairThedirectionofproteinsynthesis(polypeptidechain)is（）

答案:FromNtoCTheconceptof"wobble"involves_____.（）

答案:basepairingbetweenthethirdbaseofthecodonandthefirstbaseoftheanticodon.WhichofthefollowingstepsisNOTincludedintheproteinbiosynthesis?（）

答案:Post-transcrptionalprocessingThegeneexpressioncanberegulatedatthefollowinglevelsEXCEPT（）

答案:DNAreplicationThemRNAsequence:(5’)AAUGCAGCUUUAGCA(3’)andthesequenceofthecodingstrandis____.（）

答案:(3’)TTACGTCGAAATCGT(5’)IfthecodenofmRNAisACG,thentheanticodenoftRNAis（）

答案:CGUThesequenceofnucleotideofinitiationcodenis（）

答案:AUGPeptidyltransferase_____.（）

答案:isanintrinsicenzymaticactivityofthelargeribosomalsubunitandrequiresanRNAcomponent.RNApolymeraseisboundinitiallyto_____ofanoperon?（）

答案:PromoterPost-translationalmodificationsofpolypeptidesincludeallthefollowingEXCEPT_____?（）

答案:cappingby7-methylguanidineTheAAUAAAsequenceonaRNAmoleculemarks_____.（）

答案:Thesitenearwhichtheprimarytranscriptiscleavedandapoly(A)sequenceisadded.TheTATAboxineukaryotesisa_____.（）

答案:corepromoter.IndicatewhichofthefollowingeventscanoccurduringtheprocessingofeukaryoticmRNAtranscripts.（）

答案:Excisionsofintrons.WhichofthefollowingisNOTtrueoftheprokaryotic(E.coli)transcriptionalprocess?（）

答案:AseparatehelicaseenzymeisnecessaryforunwindingtheDNAtemplatetocreateanopencomplex.Whichofthefollowingstatementsiscorrectaboutprokaryoticgeneexpression?（）

答案:ProkaryoticmRNAsareoftentranslatedbeforetranscriptioniscomplete.ThetemplatestrandofDNAis5’-ATTCAG-3’,itstranscriptis（）

答案:5’-CUGAAU-3’RegardingtheprocessofDNAreplicationinE.coliwhichofthefollowingstatementsisWRONG?（）

答案:DNAreplicationisunidirectional.TheenzymeinchargeofproofreadingfunctioninDNAreplicationis（）

答案:DNApolymeraseAllofthefollowingstatementsconcerningDNAreplicationinprokaryotesaretrueEXCEPT____?（）

答案:OkazakifragmentsarejoinedbyDNApolymeraseIII.Xerodermapigmentosum(xp)resultsfromadeficiencyin_____.（）

答案:DNArepairWhatisthefunctionofthe3'to5'exonucleaseactivityofbacterialDNApolymerases?（）

答案:removesmismatchedbasesduringreplicationThesequenceofoneDNAstrandisATGCAA,thecomplementarystrandofDNAis（）

答案:TTGCATInthereplicationofeukaryoticDNA,（）

答案:theleadingstrandissynthesizedinthedirectiontakenbythereplicationfork.Okazakifragmentsare_____.（）

答案:foundonthelaggingstrand.DNApolymeraseIdonothas_____.（）

答案:HelicaseactivityDNApolymeraseIIIcanonlyaddnucleotidestoanexistingchain,so_____isrequired.（）

答案:anRNAprimerWhat‘sthematerialsofhemesynthesis?（）

答案:glycine,succinylCoA,Fe2+Whatdothedailybilirubinformationderivemainlyfrom?（）

答案:hemoglobinHowmanyoxygenscanamoleculeofhemoglobinbind?（）

答案:4Unconjugatedbilirubincanbesecretedintotheurineinourbodies.（）

答案:錯Thebilirubinissparinglysolubleinplasmaandwater.（）

答案:對Intheenterohepaticcirculationonlyalittlefractionofbileacidsarereabsorbedintheintestine.（）

答案:錯Whichofthefollowingenzymeistherate-limitingenzymeintheprocessofbileacidssynthesis?（）

答案:7α-hydroxylationWhichofthefollowingreactionsisthemostcommonconjugationintheliver?（）

答案:PAPSAllproductsofliverbiotransformationarenontoxic.（）

答案:錯TheprincipalnitrogenousurinaryexcretionproductinhumansresultingfromthecatabolismofAMPis（）

答案:uricacidWhichofthefollowingisnotaphysiologicalroleofnucleotide?（）。

答案:componentsofmanyproteinsWhichoneofthefollowingdoesnotoccursinthedegradationpathwayofAMP?（）

答案:TheendproductisCOWhichofthefollowingsubstancedirectlylinksnucleotidesynthesisandglucosemetabolism?（）。

答案:Ribose-5-phosphateWhichofthefollowingisthecommonmaterialforthesynthesisofpyrimidineandpurinenucleotide?（）。

答案:GlutamineTheprimaryfunctionoftheureacycleis（）

答案:toconverttoxicammoniatoureawhichcanbeexcretedTheaminoacidthatisinvolvedinalmosteveryaminotransferasereactionis（）

答案:glutamateAllofthefollowingareessentialaminoacidsEXCEPT（）

答案:serinePyridoxalphosphateactsascoenzymeinmost（）

答案:transaminationreactions.ThenitrogensinureaoriginateMOSTDIRECTLY(fewestnumberofsteps)from（）

答案:carbamoylphosphateandaspartateATPsynthasecarryoutsubstratelevelphosphorylations.（）

答案:錯Theuncouplingofoxidativephosphorylationfoundinthebrownfatmitochondriaofanewborninfantmightbeofphysiologicalimportancebecause（）

答案:itproducedheat.Whichofthefollowingcomponentsofthemitochondrialelectrontransportsystemareincapableofcarrying2electrons?（）

答案:cytochromeCThemitochondrialelectrontransportsystemresponsibleforreoxidationofNADHandelectrontransfertooxygenislocatedininnermembraneofthemitochondria.（）

答案:對Themainfunctionoftheglycerolphosphateshuttleisin（）

答案:thetransportofreducingequivalentsintomitochondriafromNADHformedduringglycolysis.Whichofthefollowingisanintermediateinketonebodysynthesis?（）

答案:3-hydroxy-3-methylglutaryl-CoAWhichofthefollowingenzymescatalyzestheratecontrollingstepinfattyacidbiosynthesis?（）

答案:acetyl-CoAcarboxylaseFattyacidsfromadiposetissuearetransportedtositesofutilizationintheformof（）

答案:freefattyacidsboundtoserumalbumin.HMGCoAcanactasaprecursorforallofthefollowingEXCEPT:（）

答案:lecithin.Indicatethecorrectsequenceofreactionsemployedforbeta-oxidationofacyl-CoAderivativesfromthelistbelow.（）

答案:oxidationcoupledtoFAD,hydration,oxidationcoupledtoNAD,thiolysisWhichcoenzymeinpyruvatedehydrogenasecomplexservesasthefinalhydrogensacceptor?（）

答案:NAD+Thedirectdonorofglucosylgroupinglycogenesisis（）.

答案:UDPGWhichpathwayofthefollowingisrelatedtonucleicacidssynthesis?（）

答案:PentosephosphatepathwayWhichofthefollowinghormonescanlowerbloodglucose？（）

答案:insulinMuscleglycogencannotreplenishbloodsugarbecausemusclecellslack（）

答案:pyruvatekinaseWhichofthefollowingvitaminscontainsthemetalcobaltatom？（）

答案:VitB12Folatedeficiencycancause（）

答案:ricketsTheactiveformofvitaminDinthebodyis（）

答案:1,25-(OH)2-vitaminD3Whichofthefollowingvitamindeficienciescausesnightblindness?（）

答案:VitAWhichof