首都医科大学 9e1KH'
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生物化学 _`94CC:
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2015首都医科大学博士入学考试-生物化学回忆版 #KSB%
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一、名词解释(应该是5个,但是记不清是哪5个了) I=`efc]T
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1.chaperon 2.motif 3.allosteric enzyme 4.ribozyme 5.gluconeogenesis 6.sernicon servativereplication #^/&fdK~A
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二、选择题(很多题记不太清楚了,细节问题请包容) ].w$b)G
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1.Which of the followingstatements concerning protein domains is true? 8>jd2'v{
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A.they are examples ofstructural motifs 4B8{\"6
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B.large polypeptide may beorganized into struoturally close but functionally independent units C>7k|;BvF
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C.the consist of separatepoly peptide chains(subunits) l>9ZAI\^
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D.they have been found onlyin prokaryotic proteins
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2.Prion disease aregenerally believed to a associated with MgLz:2
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A.infection by a RNA vins B.infection by DNA C.infection by protein D.infection by mRNA 7<?v!vQ}-
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3.The secondary structureof transfer RNA is
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A.described as double helix B.described as reversed “L” C.described as cloverleaf D.present only ineukaryotic cells Tr}c]IP*
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4.In competitive inhibiyion )5X7|*LP
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A.Km not change,Vmax not change B.Km rise, Vmaxnot change C.Km not change,Vmax rise D.Km rise, Vmaxrise Wm.SLr,o0
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5.The part og the RNApolymerase noloenzyme that initiates binding to DNA is called the uBs[[9je(
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A.sigma factor B.intron C.ribosomal RNA D.core enzyme /gHRJ$2|Sx
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6.Sunlight can damage DNAby $X-,6*
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A.making apyrimidinic sites B.causing spontaneousdeamination of bases q^dI!93n|
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C.forming pyrimidinedimmers D.alkylating DNA P5vM y'1X
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7.Which is therate-limiting enzyme, inregulation of the pentose phosphate pathway? "mT~_BsD
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A.hexokinase B.6-phosphofructokinace-1 C.Clucose-6-phosphatedehydrogenase D.pyrurate dehydrogenase FAU^(]-5m
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8.Transcription is theprocess in which .f&,~$e4
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A.protein is synthesized from DNA B.DNA is replicated ~Cj+6CrT
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C.RNA is synthesized from protein D.ENA is synthesized fromDNA 'n.eCdj
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9.Which of the following isa sis-acting element? w>VM--
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A.RNA polymerase B.Enhancer C.transcriptionfactor I D.structural gene AytHnp\H
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10.The protein that canbind to RNA and prevent the trascription is called |'=R`@w~0
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A.inducer B.repressor protein C.cis-acting element D.positive regulatoryproteins )BS./zD*[<
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11.蛋白质吸收紫外光的大小取决于 P7"g/j" "
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A.脂肪族氨基酸含量 B.酸性氨基酸含量 C.芳香族氨基酸含量 D. 蛋氨酸含量 `Nu3s<O7CF
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12.DNA变性是指 UG48g}
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A.分子中磷酸二酯键断裂 B.多核苷酸链解裂 C.DNA分子由超螺旋变为双键双螺旋 D.互补碱基之间氢键断裂 $xlI"-(
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13.关于关键酶的叙述哪项错误? VwHTtZ
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A.关键酶常是变构酶 B.关键酶常位于代谢途径的起始或分叉部位 m/%sBw\rx
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C.关键酶是共价修饰酶 D.关键酶活性最高 HDA!;&NRS
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14.下列哪个反应是三羧酸循环中的底物水平磷酸化反应: +;pdG[N
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A.异柠檬酸—α-酮戊二酸 B.琥珀酰COA—琥珀酸 C.琥珀酸—延胡索酸 D.延胡索酸—苹果酸 {Qg"1+hhM
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15.体内贮存脂肪主要代谢来自 O,]t. 1V
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A.酮体 B.葡萄糖 C.脂肪酸 D.生糖氨基酸 :_i1)4[!
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16.人体内CO2生成方式是: 92bvmP*o4
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A.O2与C直接合成 B.O2与CO结合 C.有机酸的脱羧 D.一碳单位与O2结合 QrHI}r
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17.飘零核苷酸从头合成时生成的重要代谢中间物是: `\(F
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A.GMP B.AMP C.TMP D.GTP tB'F`HM:mq
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18.细胞核中分布的酶主要是关于催化代谢的: BPIp3i
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A.糖代 B.甘油三酯代 C.蛋白质代 D.核糖代谢 r,A750P^
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19.外显子是: M4XnuFGB[w
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A.基因突变的表现 B.DNA被水解断裂片段 C.转录模板链 D.真核生物的编码序列 [kMXr'TyPX
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20.基因表达调控的基本控制点是: 'bN\bbR
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A.基因结构活化 B.转录起始 C.转录后加工 D.蛋白质的翻译及译后加工 cwlXb!S$
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21.从头合成TMP与UMP的共同原料是: Hz`rw\\Xq
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A.氨甲酰磷酸 B.磷酸核糖焦磷糖 C.甘氨酰胺核苷酸 D.甲酰甘氨核苷酸 KN'l/9.
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22.不能氧化酮体的组织是: 4r\Sbh
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A.心脏 B.肝脏 C.脑 D.肾 p{"p<XFyO
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23.三羧酸循环的限速酶是: {d.`0v9h
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A.异柠檬酸脱氢酶 B.顺乌头酸酶 C.α-酮戊二酸脱氢酶 D.苹果酸脱氢酶 YQG[8I
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24.脂肪酸合成中的供氧体是: $NJ]2P9L
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A.FADH2 B.NADH+H+ C.NADPH+H+ D.FMNH2 E
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25.血浆中胆固醇酯化需要: [CGvM{
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A.脑磷脂 B.卵磷脂 C.乙酰COA D.酯酰COA m=k(6
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26.哪个是糖酵途径中的限速酶: 41>Bm*if
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A.6-磷酸葡萄糖酶 B.6-磷酸果糖激酶-1 C.3-磷酸甘油醛脱氢酶 D.磷酸甘油 ',n;ag`c
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27.肌肉中氨基酸脱氢的主要方式 -iGt]mbJkP
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A.联合脱氢作用 B.嘌呤核苷酸循环 C.转氨作用 D.L-谷氨酸氧化脱氢作用 -
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28.体内转化一碳单位的载体是: AGQCk*dm
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A.叶酸 B.COASH C.四氢叶酸 D.FAD x-:vpv%6y
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29.合成卵磷脂时所需的活性胆碱是: 6*
cm
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A.CDP-胆碱 B.CDP-胆碱(?不记得了) C.GDP-胆碱 D.ADP-胆碱 B++.tQ=X.
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30.常见的酸性氨基酸是: {6^c3R[
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A.Asp和Gln B.Asp和Gly C.Asp和Glu D.Ary和Lys M7/P&d
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31.鸟氨酸循环中需要N-乙酰谷氨酸作为激活剂的酶是: 90|p]I%
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A.鸟氨酸氨基甲酰转移酶 B.氨基甲酰磷酸合成酶 C.精氨酸代琥珀酸裂解酶 D.精氨酸酶 5s8S;Pb]<