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一、名词解释(应该是5个,但是记不清是哪5个了) Va"_.8n|+
1.chaperon 2.motif 3.allosteric enzyme 4.ribozyme 5.gluconeogenesis 6.sernicon servativereplication \XR%pC
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二、选择题(很多题记不太清楚了,细节问题请包容) Tfc5R;Rw
1.Which of the followingstatements concerning protein domains is true? i][7S mN
A.they are examples ofstructural motifs ;u LD_1%
B.large polypeptide may beorganized into struoturally close but functionally independent units se](hu~w
C.the consist of separatepoly peptide chains(subunits) gx&BzODPd0
D.they have been found onlyin prokaryotic proteins >8;Co]::kx
2.Prion disease aregenerally believed to a associated with F,#)8>O
A.infection by a RNA vins B.infection by DNA C.infection by protein D.infection by mRNA S5ka;g
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 6L~@jg~0A[
4.In competitive inhibiyion HxJKS*H;
A.Km not change,Vmax not change B.Km rise, Vmaxnot change C.Km not change,Vmax rise D.Km rise, Vmaxrise >`DbT:/<
5.The part og the RNApolymerase noloenzyme that initiates binding to DNA is called the juuBLv
A.sigma factor B.intron C.ribosomal RNA D.core enzyme ;J pdnV
6.Sunlight can damage DNAby '01H
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A.making apyrimidinic sites B.causing spontaneousdeamination of bases xKKL4ws
C.forming pyrimidinedimmers D.alkylating DNA "iE9X.6NMu
7.Which is therate-limiting enzyme, inregulation of the pentose phosphate pathway? @YmD 79
A.hexokinase B.6-phosphofructokinace-1 C.Clucose-6-phosphatedehydrogenase D.pyrurate dehydrogenase We3*WsX\
8.Transcription is theprocess in which vrXmzq
A.protein is synthesized from DNA B.DNA is replicated MJ[#Gq\0R
C.RNA is synthesized from protein D.ENA is synthesized fromDNA Ltpd:c
9.Which of the following isa sis-acting element? B+|E|8"
A.RNA polymerase B.Enhancer C.transcriptionfactor I D.structural gene /zn|?Y[
10.The protein that canbind to RNA and prevent the trascription is called ^a|$z$spf
A.inducer B.repressor protein C.cis-acting element D.positive regulatoryproteins o9M[Zr1@k
11.蛋白质吸收紫外光的大小取决于 VtF^;
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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
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12.DNA变性是指 eN{[T
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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 ?_ [xpK()
13.关于关键酶的叙述哪项错误? _lb ^
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 bJe*J\){
C.关键酶是共价修饰酶 D.关键酶活性最高 B{!)GZ(}
14.下列哪个反应是三羧酸循环中的底物水平磷酸化反应: ~\/>b}^uf'
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 ?HVsIAU
15.体内贮存脂肪主要代谢来自 0t5>'GYX
A.酮体 B.葡萄糖 C.脂肪酸 D.生糖氨基酸 * 103
16.人体内CO2生成方式是: C=@BkneQ
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 E!Hq%L!/
17.飘零核苷酸从头合成时生成的重要代谢中间物是:
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A.GMP B.AMP C.TMP D.GTP )V JAs|
18.细胞核中分布的酶主要是关于催化代谢的:
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A.糖代 B.甘油三酯代 C.蛋白质代 D.核糖代谢 3XY$w&