CH9Word文档格式.docx
- 文档编号:17370362
- 上传时间:2022-12-01
- 格式:DOCX
- 页数:12
- 大小:20.11KB
CH9Word文档格式.docx
《CH9Word文档格式.docx》由会员分享,可在线阅读,更多相关《CH9Word文档格式.docx(12页珍藏版)》请在冰豆网上搜索。
A.dihydroxyacetonephosphate→glycerol3-phosphate
B.glucose6-phosphate→fructose6-phosphate
C.isocitrate→α-ketoglutarate
D.oxaloacetate→malate
E.pyruvate→lactate
(3)Theconversionof1moloffructose1,6-bisphosphateto2molofpyruvatebytheglycolyticpathwayresultsinanetformationof:
A.1molofNAD+and2molofATP.
B.1molofNADHand1molofATP.
C.2molofNAD+and4molofATP.
D.2molofNADHand2molofATP.
E.2molofNADHand4molofATP.
(4)Whenamuscleisstimulatedtocontractaerobically,lesslacticacidisformedthanwhenitcontractsanaerobicallybecause:
A.glycolysisdoesnotoccurtosignificantextentunderaerobicconditions.
B.muscleismetabolicallylessactiveunderaerobicthananaerobicconditions.
C.thelacticacidgeneratedisrapidlyincorporatedintolipidsunderaerobicconditions.
D.underaerobicconditionsinmuscle,themajorenergy-yieldingpathwayisthepentosephosphatepathway,whichdoesnotproducelactate.
E.underaerobicconditions,mostofthepyruvategeneratedasaresultofglycolysisisoxidizedbythecitricacidcycleratherthanreducedtolactate.
(5)Whichofthesecofactorsparticipatesdirectlyinmostoftheoxidation-reductionreactionsinthefermentationofglucosetolactate?
A.ADP
B.ATP
C.FAD/FADH2
D.Glyceraldehyde3-phosphate
E.NAD+/NADH
(6)Incomparisonwiththerestingstate,activelycontractinghumanmuscletissuehasa:
A.higherconcentrationofATP.
B.higherrateoflactateformation.
C.lowerconsumptionofglucose.
D.lowerrateofconsumptionofoxygen
E.lowerratioofNADHtoNAD+.
(7)Thestepsofglycolysisbetweenglyceraldehyde3-phosphateand3-phosphoglycerateinvolveallofthefollowingexcept:
A.ATPsynthesis.
B.catalysisbyphosphoglyceratekinase.
C.oxidationofNADHtoNAD+.
D.theformationof1,3-bisphosphoglycerate.
E.utilizationofPi.
(8)Thefirstreactioninglycolysisthatresultsintheformationofanenergy-richcompound(inotherwords,acompoundwhosehydrolysishasahighlynegative∆G'
°
)iscatalyzedby:
A.glyceraldehyde3-phosphatedehydrogenase.
B.hexokinase.
C.phosphofructokinase-1.
D.phosphoglyceratekinase.
E.triosephosphateisomerase.
(9)Whichofthefollowingisacofactorinthereactioncatalyzedbyglyceraldehyde3-phosphatedehydrogenase?
A.ATP
B.Cu2+
C.heme
D.NAD+
E.NADP+
(10)Glycogenisconvertedtomonosaccharideunitsby:
A.glucokinase.
B.glucose-6-phosphatase
C.glycogenphosphorylase.
D.glycogensynthase.
E.glycogenase.
(11)Whichofthefollowingstatementsisincorrect?
A.Aerobically,oxidativedecarboxylationofpyruvateformsacetatethatentersthecitricacidcycle.
B.Inanaerobicmuscle,pyruvateisconvertedtolactate.
C.Inyeastgrowinganaerobically,pyruvateisconvertedtoethanol.
D.Reductionofpyruvatetolactateregeneratesacofactoressentialforglycolysis.
E.Underanaerobicconditions,pyruvatedoesnotformbecauseglycolysisdoesnotoccur.
(12)Inthealcoholicfermentationofglucosebyyeast,thiaminepyrophosphateisacoenzymerequiredby:
A.aldolase.
C.lactatedehydrogenase.
D.pyruvatedecarboxylase.
E.transaldolase.
(13)Whichofthefollowingcompoundscannotserveasthestartingmaterialforthesynthesisofglucoseviagluconeogenesis?
A.acetate
B.glycerol
C.lactate
D.oxaloacetate
E.α-ketoglutarate
(14)Anenzymeusedinbothglycolysisandgluconeogenesisis:
A.3-phosphoglyceratekinase.
B.glucose6-phosphatase.
C.hexokinase.
D.phosphofructokinase-1.
E.pyruvatekinase.
(15)Whichoneofthefollowingstatementsaboutgluconeogenesisisfalse?
A.Forstartingmaterials,itcanusecarbonskeletonsderivedfromcertainaminoacids.
B.Itconsistsentirelyofthereactionsofglycolysis,operatinginthereversedirection.
C.Itemploystheenzymeglucose6-phosphatase.
D.Itisoneofthewaysthatmammalsmaintainnormalbloodglucoselevelsbetweenmeals.
E.Itrequiresmetabolicenergy(ATPorGTP).
(16)Allofthefollowingenzymesinvolvedintheflowofcarbonfromglucosetolactate(glycolysis)arealsoinvolvedinthereversalofthisflow(gluconeogenesis)except:
B.aldolase.
C.enolase.
E.phosphoglucoisomerase.
(17)Inhumans,gluconeogenesis:
A.canresultintheconversionofproteinintobloodglucose.
B.helpstoreducebloodglucoseafteracarbohydrate-richmeal.
C.isactivatedbythehormoneinsulin
D.isessentialintheconversionoffattyacidstoglucose.
E.requirestheenzymehexokinase.
(18)Whichofthefollowingstatementsaboutthepentosephosphatepathwayiscorrect?
A.Itgenerates36molofATPpermoleofglucoseconsumed.
B.Itgenerates6molesofCO2foreachmoleofglucoseconsumed.
C.Itisareductivepathway;
itconsumesNADH.
D.Itispresentinplants,butnotinanimals.
E.Itprovidesprecursorsforthesynthesisofnucleotides.
(19)Themainfunctionofthepentosephosphatepathwayisto:
A.givethecellanalternativepathwayshouldglycolysisfail.
B.provideamechanismfortheutilizationofthecarbonskeletonsofexcessaminoacids.
C.supplyenergy.
D.supplyNADH.
E.supplypentosesandNADPH.
(20)Themetabolicfunctionofthepentosephosphatepathwayisto:
A.actasasourceofADPbiosynthesis.
B.generateNADPHandpentosesforthebiosynthesisoffattyacidsandnucleicacids.
C.participateinoxidation-reductionreactionsduringtheformationofH2O.
D.provideintermediatesforthecitricacidcycle.
E.synthesizephosphoruspentoxide.
(21)Whichofthefollowingstatementsaboutthepentosephosphatepathwayisincorrect?
A.ItgeneratesCO2fromC-1ofglucose.
B.Itinvolvestheconversionofanaldohexosetoanaldopentose.
C.Itisprominentinlactatingmammaryglands.
D.ItisprincipallydirectedtowardthegenerationofNADPH.
E.Itrequirestheparticipationofmolecularoxygen.
(22)Theoxidationof3molofglucosebythepentosephosphatepathwaymayresultintheproductionof:
A.2molofpentose,4molofNADPH,and8molofCO2.
B.3molofpentose,4molofNADPH,and3molofCO2.
C.3molofpentose,6molofNADPH,and3molofCO2.
D.4molofpentose,3molofNADPH,and3molofCO2.
E.4molofpentose,6molofNADPH,and6molofCO2.
(23)Whichofthefollowingisnottrueofthereactioncatalyzedbythepyruvatedehydrogenasecomplex?
A.Biotinparticipatesinthedecarboxylation.
B.BothNAD+andaflavinnucleotideactaselectroncarriers.
C.Thereactionoccursinthemitochondrialmatrix.
D.Thesubstrateisheldbythelipoyl-lysine“swingingarm.”
E.Twodifferentcofactorscontaining—SHgroupsparticipate.
(24)Whichofthebelowisnotrequiredfortheoxidativedecarboxylationofpyruvatetoformacetyl-CoA?
B.CoA-SH
C.FAD
D.Lipoicacid
E.NAD+
(25)Whichcombinationofcofactorsisinvolvedintheconversionofpyruvatetoacetyl-CoA?
A.Biotin,FAD,andTPP
B.Biotin,NAD+,andFAD
C.NAD+,biotin,andTPP
D.Pyridoxalphosphate,FAD,andlipoicacid
E.TPP,lipoicacid,andNAD+
(26)Whichofthefollowingisnottrueofthecitricacidcycle?
A.Allenzymesofthecyclearelocatedinthecytoplasm,exceptsuccinatedehydrogenase,whichisboundtotheinnermitochondrialmembrane.
B.Inthepresenceofmalonate,onewouldexpectsuccinatetoaccumulate.
C.Oxaloacetateisusedasasubstratebutisnotconsumedinthecycle.
D.Succinatedehydrogenasechannelselectronsdirectlyintotheelectrontransferchain.
E.ThecondensingenzymeissubjecttoallostericregulationbyATPandNADH.
(27)Malonateisacompetitiveinhibitorofsuccinatedehydrogenase.Ifmalonateisaddedtoamitochondrialpreparationthatisoxidizingpyruvateasasubstrate,whichofthefollowingcompoundswouldyouexpecttodecreaseinconcentration?
A.Citrate
B.Fumarate
C.Isocitrate
D.Pyruvate
E.Succinate
(28)Whichofthefollowingisnotanintermediateofthecitricacidcycle?
A.Acetyl-CoA
B.Citrate
C.Oxaloacetate
D.Succinyl-CoA
E.α-Ketoglutarate
(29)Inmammals,eachofthefollowingoccursduringthecitricacidcycleexcept:
(A)formationofα-ketoglutarate.
(B)generationofNADHandFADH2.
(C)metabolismofacetatetocarbondioxideandwater.
(D)netsynthesisofoxaloacetatefromacetyl-CoA.
(E)oxidationofacetyl-CoA.
(30)Conversionof1molofacetyl-CoAto2molofCO2andCoAviathecitricacidcycleresultsinthenetproductionof:
A.1molofcitrate.
B.1molofFADH2.
C.1molofNADH.
D.1molofoxaloacetate.
E.7molofATP.
(31)ThetwomolesofCO2producedinthefirstturnofthecitricacidcyclehavetheirorigininthe:
A.carboxylandmethylenecarbonsofoxaloacetate.
B.carboxylgroupofacetateandacarboxylgroupofoxaloacetate.
C.carboxylgroupofacetateandtheketogroupofoxaloacetate.
D.
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- CH9