首都医科大学 _o52#Q4
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生物化学 K7 J RCLA
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2015首都医科大学博士入学考试-生物化学回忆版 RoFOjCc>D.
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一、名词解释(应该是5个,但是记不清是哪5个了) ^ Fnag]qQ
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1.chaperon 2.motif 3.allosteric enzyme 4.ribozyme 5.gluconeogenesis 6.sernicon servativereplication 2il`'X
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二、选择题(很多题记不太清楚了,细节问题请包容) ELN1F0TneH
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1.Which of the followingstatements concerning protein domains is true? T4nWK!}z
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A.they are examples ofstructural motifs {E;oirv&
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B.large polypeptide may beorganized into struoturally close but functionally independent units YNB7`:
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C.the consist of separatepoly peptide chains(subunits) I7#^'/
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D.they have been found onlyin prokaryotic proteins a&Z,~Vp
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2.Prion disease aregenerally believed to a associated with TVM19)9
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A.infection by a RNA vins B.infection by DNA C.infection by protein D.infection by mRNA sVpET
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3.The secondary structureof transfer RNA is <L('RgA@X
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A.described as double helix B.described as reversed “L” C.described as cloverleaf D.present only ineukaryotic cells t#VX#dJ
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4.In competitive inhibiyion #~m8zG
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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 8Vjv #pm
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5.The part og the RNApolymerase noloenzyme that initiates binding to DNA is called the FUXJy{n6"2
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A.sigma factor B.intron C.ribosomal RNA D.core enzyme O')=]6CQ*
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6.Sunlight can damage DNAby 4TI`
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A.making apyrimidinic sites B.causing spontaneousdeamination of bases 5NC77}^.
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C.forming pyrimidinedimmers D.alkylating DNA 2$MoKOx8$
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7.Which is therate-limiting enzyme, inregulation of the pentose phosphate pathway? +_k A&Q(t
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A.hexokinase B.6-phosphofructokinace-1 C.Clucose-6-phosphatedehydrogenase D.pyrurate dehydrogenase `zrg?
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8.Transcription is theprocess in which LEOri=?RF
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A.protein is synthesized from DNA B.DNA is replicated Sa%%3_&
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C.RNA is synthesized from protein D.ENA is synthesized fromDNA F:d2;
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9.Which of the following isa sis-acting element? oc]:Ty
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A.RNA polymerase B.Enhancer C.transcriptionfactor I D.structural gene {
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10.The protein that canbind to RNA and prevent the trascription is called |/H?\]7
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