武汉大学至学年第一学期分子生物学期末考试试题.docx
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武汉大学至学年第一学期分子生物学期末考试试题.docx
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武汉大学至学年第一学期分子生物学期末考试试题
武汉大学2003至2004学年第一学期分子生物学期末考试试题
武汉大学生命科学学院
2003-2004学年第一学期期末考试
《分子生物学》试卷
FinalexamofMolecularBiologyCourse(Spring2004)
年级______ 专业________ 学号_________ 姓名_______成绩______
PARTI:
DESCRIPTION(2pointseach)
Youranswershoulddescribewhateachitemisandhowitfunctionsinthecell.Diagrams,structureandsequenceinformationshouldbeincludedinyouranswer,asnecessary.
1. Yeastartificialchromosome
2. RNAinterference
3. Proteomics
4. Shine-Dalgarnosequence
5. Alternativesplicing
6. Ribozyme
7. r-dependenttermination
8. RNAediting
9. DNAlesions
10. Proteintargeting
PARTII:
MULTIPLECHOICES (1pointseach)
Selectthe onebestanswer foreachquestion.
1.Thecatalyticactivityforpeptidebondformation(thepeptidyltransferaseactivity)islocatedinthe:
1) RNAofthelargeribosomalsubunit.
2) leadersequenceofthemessengerRNA.
3) RNAofthesmallribosomalsubunit.
4) proteinsofthesmallribosomalsubunit.
5) proteinsofthelargeribosomalsubunit.
2.Bidirectionalandsemi-conservativearetwotermsthatreferto:
1) transcription.
2) translation.
3) replication.
4) alloftheabove.
5) noneoftheabove.
3.Thefactthatmostaminoacidsarespecifiedbymultiplecodonsisknownas:
1) the“wobble”phenomenon.
2) theuniversalityofthegeneticcode.
3) codonbias.
4) theanticodonhypothesis.
5) theredundancyofthegeneticcode.
4.RNApolymeraseIistheeukaryoticenzymeresponsiblefor:
1) transcriptionofribosomalRNA.
2) transcriptionoftransferRNAandothersmallRNAspecies.
3) transcriptionofmessengerRNA.
4) initiationofOkazakifragmentsynthesisinDNAreplication.
5.RestrictionenzymescancleaveDNAthatiseithersingle-strandedordouble-stranded,aslongasitcontainstheappropriaterecognitionsite.
1)True 2)False
6.Informationaboutthesequenceofthecodingregionofageneisbestobtainedfrom:
1) aYACclone.
2) agenomicclone.
3) acDNAclone.
4) theprotein.
7.Achromatographymethodthatcanbeusedspecificallytopurifyproteinsbasedontheirchargeis:
1) gelfiltrationchromatography.
2) ion-exchangechromatography.
3) DNAaffinitychromatography.
4) antibodyaffinitychromatography.
8.AnonsensemutationisachangeintheDNAsequencethatresultsin:
1) asmalldeletionorinsertion.
2) anaminoacidchangeintheproteinencodedbythegene.
3) aprematurestopcodon.
4) alloftheabove.
5) noneoftheabove.
9.Aproteincomplexinvolvedindegradationofproteinswithinthecellisknownasthe:
1) ubiquitin/proteasomesystem.
2) molecularchaperone.
3) chaperonin.
4) ribosome.
5) Krebs/TCAcycle.
10.___bindstotherepressorandturnonthetranscriptionofthestructuralgenesintheLacoperon.
1) cAMP
2) lactose
3) allolactose
4) CRP
11.WhichofthefollowingRNAspeciesisinvolvedindegradationofthemRNAcontainingcomplementarysequence
1) miRNA
2) siRNA
3) tRNA
4) 5SRNA
5) U3snRNA
12.Thegenomesequencingprojectsareconfirmingthetheorythatgenomesizeisdirectlyproportionaltothenumberofgenescontainedwithinthatgenome.Inotherwords,agenomethatis10timesasbigwillcontainsapproximately10timesasmanyproteincodinggenes.
1)True 2)False
13.HeLacells,derivedfromahumancervicalcarcinoma,areabletopropagateindefinitelyincultureandarethereforeknownasa(n):
1) tissueculture.
2) tumor.
3) transgeniccellline.
4) immortalizedcellline.
14. E.coli cellsaresmallerthanyeastcells.
1)True 2)False
15.WhichofthefollowingdomainsisnotaDNAbindingdomain
1) Proline-richdomains
2) Helix-turnhelixdomains
3) Zincfingerdomains
4) Basicdomains
16.Theaminoacyl-tRNAsynthetasesdistinguishbetweenabout40differentshapedtRNAmoleculesinthecells.
1)True 2)False
PARTIII:
SHORTQUESTIONS (8pointseach)
1. Howdobacterialreplicationstartandaccomplished.Remembertoincludetheproteins/enzymesandimportantDNAsequenceinvolvedinthisprocess.
2. Designexperimentsto clone ayeastgeneand express thisgeneinyeast.
3. Belowisthemultiplecloningsite(MCS)oftheplasmidvectorpUC18andtheN-terminalandC-terminalsequenceofproteinX.NotethattheMCSconstitutesapartoftheLacZopenreadingframe.Supposethatyouaregoingtoclonethe
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