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1、中山大学生命科学学院试卷生物化学I（2005年秋季学期,B卷）专业(班级)：姓名：学号：阅卷教师：题号一二三四五六合计分数警示《中山大学授予学士学位工作细则》第六条：“考试作弊不授予学士学位”。一、选择唯一正确答案（每小题2分，共30分）1.WhenthepHis2unitsbelowthepKaofaspecificgroup,theratioofprotonatedtounprotonatedspeciesinthesolutionisA)10:1infavoroftheprotonatedform.B)100:1i
2、nfavoroftheunprotonatedform.C)1000:1infavoroftheunprotonatedform.D)100:1infavoroftheprotonatedform.E)Equalamountoftheprotonatedandunprotonatedforms.2.ThetitrationcurveshownbelowismostcharacteristicoftheaminoacidA)TyrosineB)ValineC)GlutamicacidD)LysineE)Glycine3.W
3、hichoneofthelocalanestheticsshownbelowwillexisttoagreaterextentintheirprotonatedformatphysiologicalpH(pH7.4)?A)NovacaineB)LignocaineC)bothNovacaineandLignocainewillbefullydeprotonatedD)bothNovacaineandLignocainewillbefullyprotonatedE)NovacaineandLignocainewillbep
4、rotonatedtothesameextent4.Inamixtureofthefiveproteinslistedbelow,whichshouldelutesecondinsize-exclusion(gelfiltration)chromatography?7中山大学生命科学学院试卷A)cytochromec,Mr=13,000B)immunoglobulinG,Mr=145,000C)ribonucleaseA,Mr=13,700D)RNApolymerase,Mr=450,000E)serumalbumin,
5、Mr=68,5005.Whichofthefollowingbestrepresentsthebackbonearrangementoftwopeptidebonds?A)Ca-N-Ca-C-Ca-N-Ca-CA)Ca-N-C-C-N-CaB)C-N-Ca-Ca-C-NC)Ca-C-N-Ca-C-ND)Ca-Ca-C-N-Ca-Ca-C6．WhichoneofthefollowingstatementsregardingthecarbohydratestructuresshownbelowisFALSE?A)Carboh
6、ydrateIhasana-1,4linkage,whereascarbohydrateIIhasab-1,4linkage.B)CarbohydrateIandcarbohydrateIIarebothcharacterizedashavingtheirfreeanomerichydroxylsinthebconformation.C)CarbohydrateIandCarbohydrateIIarebothoftheD-configuration.D)CarbohydrateIandCarbohydrateIIare
7、reducingcarbohydrates.E)NoneoftheaboveisFALSE.7．Theglucosestoragepolymer,glycogen,whichisshownbelowinschematicformat,isapolymerof_______linkedchainsofD-glucosewith_______branches.Ithas_______reducingend(s)and________non-reducingend(s).A)a-1,3,a-1,5,many,oneB)b-1,
8、3,b-1,5,one,oneC)a-1,4,a-1,6,one,many7中山大学生命科学学院试卷A)b-1,4,b-1,6,many,oneB)a-1,4,a-1,6,one,one8.WhichoneofthefollowingstatementsisFALSEforBOTHmyoglobinandhemogl
