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1、2015四川省预防医学(必备资料)（2015preventivemedicineinSichuanprovince(necessaryinformation)）1,themostprobablelethalmutationisdeletionorinsertionofanucleotide,themechanismis()A.baseconversionBaseshiftofB.C.frameshiftmutationD.nonsensemutationE.spontaneoustransitionmutationThe
2、correctanswer:C,2,Mycobacteriumtuberculosiscausesthebody'simmunesystemtobeA.localimmunityB.infectionimmunityC.humoralimmunityD.antitoxinimmunizationE.antibacterialimmunityThecorrectanswer:B,3,whichoneiscorrectaboutthedescriptionoftRNA?"A.5"is-CCAB.tRNAismadeupofn
3、ucleotidesThetwostagestructureofC.tRNAisthetwoleafgrasstypeD.tRNAisrichinrarebasesandnucleosidesE.hasanticodoninitsDHUringThecorrectanswer:D,4、thepathologicaldiagnosisofchronicsuppurativeosteomyelitisofthejawsisbasedon()A.alveolarmucosarednessandswellingB.alargen
4、umberofinflammatorycellsinfiltrationC.boneresorptionD.deadboneformationE.fistulaformationThecorrectanswer:D,5.Themainsourceofthebodyis()A.intestinalabsorptionB.kidneysproduceammoniaC.aminoaciddeaminationD.aminedecompositionE.basedecompositionThecorrectanswer:C6.T
5、hecommonenzymegroupsare()A.carboxylgroup,carbonylgroup,aldehydegroup,ketonebaseB.carboxylgroup,hydroxylgroup,aminogroupandsulfhydrylgroupC.carboxylgroup,carbonylgroup,ketonegroupandacylgroupD.aminogroup,carboxylgroup,sulfhydrylgroupandhydroxylgroupE.hydroxygroup,
6、carbonylgroup,carboxylgroupandaldehydegroupThecorrectanswer:B901,NotbelongingtothevitaminBcoenzymeis()A.pyridoxal-5-phosphateB.cytochromeCC.coenzymeAD.leucovorinE.thiaminepyrophosphateThecorrectanswer:B,902,ThestatementaboutthekeyenzymeiscorrectA.hasthelowestcata
7、lyticactivityintheenzymesystemB.isoftenanenzymeintheintermediatereactionoftheenzymesystemC.catalyzedreversiblereactionD.theregulationoftheenzymeactivitydoesnotchangethereactionrateofthewholereactionsystemThestartingsubstanceofE.reactionsystemcanregulatethekeyenzy
8、meThecorrectanswer:A,903,Asregardstheregulationofcovalentmodifications,thecorrectoneis()TheA.metaboliteactsontheallostericsiteoftheenzyme,causingconformational
