Exam III fall 03 - (.-~.".....

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Unformatted text preview: (.-~.".. ,..,,"".BI0321Exam 3 Fall 2003 Page 1 of 4... ,.,.,""'v""..~.-,",,.-..,~.M.',".,."..,-,..".''.-~'-"-"~'._'W'o,'..'..';,,'',-"'\.';1.Whichofthefollowingclassesofmoleculethatformthecytoskeletonproducethestrongestfilaments?~A.actinfilamentsB.microtubulesC--.rj,.nt.c r ll1t::H]ia -te 1.1en'i\ent--s-2.Atwha.tstageof mitosis areseentostarttocondense?A.AnaphaseB.Telophase<C.iProphaseD.Sphase3.Thereare5typesofhistoneproteins,calledaI,H2,H3,H4andHSA.True~B.FalsechromosomeslPrv1AP4.In eucaryotes,allgenomeisrequiredexpressionA.True-B.FalseoftheDNAinthefornormalgene5.Generaltranscriptionfactorsactivatetranscriptioninbothprocaryotesandeucaryotes-<A.TrueB.Falsegene-'-6.Howmanylevelsofchromatinthereineucaryotes?A.IB.2'"C.3 .D.morethan3packingare..7.RNAprocessingisaformofgenecontrol-A. TrueB.False-a.GenderinDrosophiliaembryosisdefinedbythegenessex-lethal,transformedanddouble-sex.Interplaybetweenthesegeneproductsresultintheformationofthesametypeofprotein.Howcanthissametypeofproteindefinebothsexes?~A.itdependsontheamountofproteinproducedB.theproteinistheproductofregulatedalternativesplicing~.theproteinbindstoothervariablefactorsincellsofthegermline9.Checkpointsinthecellcyclearecontrolledbybindingofproteinstocyclin-cdkcomplexesA.TrueS.False---~O.Whichofthefollowingclassesofthatformthecytoskeletonhasacylindricalstructure?A.actinfilaments.,..,B.microtubulesC.intermediatefilamentsmolecule~l.Whydoescyclinconcentrationriseandfallwiththecellcyclebutcdksdonot?A.cyclinsaredegradedafterthecyclin-cdkcomplexbecomesactiveB.theproductionofcyclinmRNAisswitchedonandoffatdifferenttimesinthecellcycleC.cyclins,butnotcdks,areinhibitedbyCAKD .cdks',butnotcyclins,areinhibi.tedbyCA.-I<\12.WhatroledoestheARPcomplexplayincellmovement?A.thec~plex~cts*a~cleati~si~efor,ubUI~:\monoersinthel~adi~gedgeofthecellcortx~.thecomplexactsasanucleationsiteforactinmonomersintheleadingedgeofthecellcortexC.theco~ex.ac~as a~~clea\ion~f7efortullnmDomer~nthe\traJ.~ngedgethece1core~xD.thecomplexactsasanucleationsiteforactinmonomersinthetrailingedgeofthecellcortex--13.What istheconnectionbetweenprofilinandthymosin?-A.theyregulatethepolymerizationofactinB.theyregulatethepolymerizationofintermediatefilamentsc. -theycontrolATPhydrolysisbytubulininthepolymerizedform--i.4.What ismeantbycombinatorialgenecontrol?A.manygeneraltranscriptionfactorsarerequiredtoactivateRNApolymeraseatthepromotersite~B.manyregulatoryproteinsinfluencetheassemblyofgeneraltranscriptionfactorsatthepromotersiteC.genesineucaryoteshavemultiple,combinedpromotersitesIS. Whichofthefollowingisnot.a .necessaryconditionthatmustbemetinordertoallowthefullyformedmRNAmoleculestoleavethenucleusA.themRNAmustbecappedB.themRNAmustbetailed...
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Exam III fall 03 - (.-~.".....

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