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2015首都医科大学博士入学考试-生物化学回忆版 iT"H%{+~
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一、名词解释(应该是5个,但是记不清是哪5个了) #^;^_
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1.chaperon 2.motif 3.allosteric enzyme 4.ribozyme 5.gluconeogenesis 6.sernicon servativereplication ^p !4`S
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二、选择题(很多题记不太清楚了,细节问题请包容) O-K!Bv^
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1.Which of the followingstatements concerning protein domains is true? Le':b2o
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A.they are examples ofstructural motifs !WReThq
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B.large polypeptide may beorganized into struoturally close but functionally independent units BA+:}81&<q
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C.the consist of separatepoly peptide chains(subunits) kg_f;uk+
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D.they have been found onlyin prokaryotic proteins fMFlY%@t
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2.Prion disease aregenerally believed to a associated with 7F{=bL
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A.infection by a RNA vins B.infection by DNA C.infection by protein D.infection by mRNA "@[xo7T
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3.The secondary structureof transfer RNA is YMx
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A.described as double helix B.described as reversed “L” C.described as cloverleaf D.present only ineukaryotic cells %KmB>9
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4.In competitive inhibiyion u?f3&pA
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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 O:a$ U:
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5.The part og the RNApolymerase noloenzyme that initiates binding to DNA is called the oLn| UWe_
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A.sigma factor B.intron C.ribosomal RNA D.core enzyme CW=-@W7
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6.Sunlight can damage DNAby '}5}wCLA
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A.making apyrimidinic sites B.causing spontaneousdeamination of bases G<