REEC2795_10_CBTG_bio10_ch12

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1、CampbellBiology,10e(Reece)Chapter12TheCellCycle1)Ineukaryoticcells,chromosomesarecomposedof_____.A)DNAandRNAB)DNAonlyC)DNAandproteinsD)DNAandphospholipidsAnswer:CBloom'sTaxonomy:Knowledge/ComprehensionSection:12.12)Whatisthefinalresultofmitosisinahuman?A)geneticallyidentical2nso

2、maticcellsB)geneticallydifferent2nsomaticcellsC)geneticallyidentical1nsomaticcellsD)geneticallyidentical2ngametecellsAnswer:ABloom'sTaxonomy:Knowledge/ComprehensionSection:12.13)Startingwithafertilizedegg(zygote),aseriesoffivecelldivisionswouldproduceanearlyembryowithhowmanycell

3、s?A)8B)16C)32D)64Answer:CBloom'sTaxonomy:Application/AnalysisSection:12.14)Ifthereare20duplicatedchromosomesinacell,howmanycentromeresarethere?A)10B)20C)30D)40Answer:BBloom'sTaxonomy:Application/AnalysisSection:12.117Copyright©2014PearsonEducation,Inc.5)Scientistsisolatecellsinv

4、ariousphasesofthecellcycle.TheyfindagroupofcellsthathavetimesmoreDNAthanG1phasecells.Thecellsofthisgroupare_____.A)betweentheG1andSphasesinthecellcycleB)intheG2phaseofthecellcycleC)intheMphaseofthecellcycleD)intheSphaseofthecellcycleAnswer:DBloom'sTaxonomy:Application/AnalysisSe

5、ction:12.26)Thefirstgapinthecellcycle(G1)correspondsto_____.A)normalgrowthandcellfunctionB)thephaseinwhichDNAisbeingreplicatedC)thebeginningofmitosisD)thephasebetweenDNAreplicationandtheMphaseAnswer:ABloom'sTaxonomy:Knowledge/ComprehensionSection:12.27)Themicrotubule-organizingc

6、enterfoundinanimalcellsisanidentifiablestructurepresentduringallphasesofthecellcycle.Specifically,itisknownasthe_____.A)microtubulereB)centrosomeC)centromereD)kinetochoreAnswer:BBloom'sTaxonomy:Knowledge/ComprehensionSection:12.28)Inhumanandmanyothereukaryoticspecies'cells,thenu

7、clearmembranehastodisappeartopermit_____.A)cytokinesisB)theattachmentofmicrotubulestokinetochoresC)thesplittingofthecentrosomesD)thedisassemblyofthenucleolusAnswer:BBloom'sTaxonomy:Knowledge/ComprehensionSection:12.217Copyright©2014PearsonEducation,Inc.9)Themitoticspindleisamicr

8、otubularstructurethatisinvolvedin_____.A)splitt