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生物化学 7(QRG\G#
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2015首都医科大学博士入学考试-生物化学回忆版 \rF6"24t6
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一、名词解释(应该是5个,但是记不清是哪5个了) Q&opnvN
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1.chaperon 2.motif 3.allosteric enzyme 4.ribozyme 5.gluconeogenesis 6.sernicon servativereplication ryB^$Kh,,
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二、选择题(很多题记不太清楚了,细节问题请包容) ms{:=L2$$
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1.Which of the followingstatements concerning protein domains is true? X,C&nqVFm8
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A.they are examples ofstructural motifs "w9LQ=mW
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B.large polypeptide may beorganized into struoturally close but functionally independent units SpPG
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C.the consist of separatepoly peptide chains(subunits) 8c(}*,O/
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D.they have been found onlyin prokaryotic proteins XKp.]c
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2.Prion disease aregenerally believed to a associated with r5jiB L~
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A.infection by a RNA vins B.infection by DNA C.infection by protein D.infection by mRNA R $HIJM
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3.The secondary structureof transfer RNA is A ${b]
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A.described as double helix B.described as reversed “L” C.described as cloverleaf D.present only ineukaryotic cells VgtWT`F.I
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4.In competitive inhibiyion GE]fBg
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A.Km not change,Vmax not change B.Km rise, Vmaxnot change C.Km not change,Vmax rise D.Km rise, Vmaxrise EF=.L
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5.The part og the RNApolymerase noloenzyme that initiates binding to DNA is called the Zq=t&$*
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A.sigma factor B.intron C.ribosomal RNA D.core enzyme Y^m2ealC
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6.Sunlight can damage DNAby ez=$ ]cln
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A.making apyrimidinic sites B.causing spontaneousdeamination of bases _/ bF t6
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C.forming pyrimidinedimmers D.alkylating DNA }3:DJ(Y
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7.Which is therate-limiting enzyme, inregulation of the pentose phosphate pathway? ;ZXP*M9
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A.hexokinase B.6-phosphofructokinace-1 C.Clucose-6-phosphatedehydrogenase D.pyrurate dehydrogenase ;l>
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8.Transcription is theprocess in which E*ybf'
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A.protein is synthesized from DNA B.DNA is replicated rHPda?&H
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C.RNA is synthesized from protein D.ENA is synthesized fromDNA `?LQd2p
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9.Which of the following isa sis-acting element? D}'g4Ag
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A.RNA polymerase B.Enhancer C.transcriptionfactor I D.structural gene =2uE\6Fl,
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10.The protein that canbind to RNA and prevent the trascription is called iY"I:1l.
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A.inducer B.repressor protein C.cis-acting element D.positive regulatoryproteins =o;QvOS;
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11.蛋白质吸收紫外光的大小取决于 GjZ@fnF
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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 `%;nHQ"
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12.DNA变性是指 YS=|y}Q|7d
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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 o O%!P<