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Ccbc Bio 110 Exam 2 Questions And Answers Rated A+ Sure Pass!!!

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Institution CCBC BIO 110
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CCBC BIO 110 EXAM 2 QUESTIONS AND ANSWERS RATED A+ SURE PASS!!!

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CCBC BIO 110 EXAM 2 QUESTIONS
AND ANSWERS RATED A+ SURE
PASS!!!
CellmtheorymproposedmbymMathiasmSchleidenmandmTheodoremSchwann:m-
mCORRECTmANSWERSm•mAllmorganismsmaremmademofmcells



•mThemcellmismthemsimplestmcollectionmofmmattermthatmcanmbemalive

•mAllmcellsmaremrelatedmbymtheirmdescentmfrommearliermcells

•mCellsmcanmdiffermsubstantiallymfrommonemanothermbutmsharemcommonmfeatures



Limitsmtomcellmsize:m-
mCORRECTmANSWERSm•mCellsmaremusuallymtoomsmallmtombemseenmbymthemnakedmeye.mMicroscopesm


aremusedmtomvisualizemcells.

•mMetabolicmrequirementsmsetmuppermlimitsmonmthemsizemofmcells.mThemsurfacemareamtomvolumemra
tiomof

amcellmismcritical.mAsmamcellmincreasesminmsize,mitsmvolumemgrowsmproportionatelymmoremthanmitsmsu
rface

area.

•mThemplasmammembranemismamselectivembarriermthatmallowsmsufficientmpassagemofmoxygen,mnutri
ents,

andmwastemtomservicemthemvolumemofmeverymcell.



Prokaryoticmcellsmhave:m-mCORRECTmANSWERSm•mNomnucleus.

•mDNAminmanmunboundmregionmcalledmthemnucleoid.

•mNommembrane-boundmorganelles.

•mCytoplasmmboundmbymthemplasmammembrane

,Eukaryoticmcellsmaremcharacterizedmbymhaving:m-
mCORRECTmANSWERSm•mDNAminmamnucleusmthatmismboundedmbymammembranousmnuclearmenvelop


e.

•mMembrane-boundmorganelles.

•mCytoplasmminmthemregionmbetweenmthemplasmammembranemandmnucleus.

•mEukaryoticmcellsmaremgenerallymmuchmlargermthanmprokaryoticmcells.



Themeukaryoticmcell'smgeneticminstructionsmarem-
mCORRECTmANSWERSmhousedminmthemnucleusmandmcarriedmoutmbymthemribosomes




Themnucleusm-
mCORRECTmANSWERSmcontainsmmostmofmthemcell'smgenesmandmismusuallymthemmostmconspicuousmo


rganelle



Themnuclearmenvelopem-
mCORRECTmANSWERSmenclosesmthemnucleus,mseparatingmitmfrommthemcytoplasm.mThemnuclear



membranemismamdoublemmembrane;meachmmembranemconsistsmofmamphospholipidmbilayer.



Inmthemnucleus,mDNAmismorganizedmintomdiscretemunitsmcalledm-
mCORRECTmANSWERSmchromosomes.mEachmchromosomemis



composedmofmamsinglemDNAmmoleculemassociatedmwithmproteins.



ThemDNAmandmproteinsmofmchromosomesmaremtogethermcalledm-
mCORRECTmANSWERSmchromatin.mChromatinmcondensesmto



formmdiscretemchromosomesmasmamcellmpreparesmtomdivide.



Themnucleolusmism-
mCORRECTmANSWERSmlocatedmwithinmthemnucleusmandmismthemsitemofmribosomalmRNAm(rRNA)msynt


hesis.

, Ribosomesm-mCORRECTmANSWERSmaremcomplexesmmademofmribosomalmRNAmandmprotein.



Ribosomesmcarrymoutmprotein:msynthesisminmtwomlocationsm-
mCORRECTmANSWERSm•mInmthemcytosolm(freemribosomes)



•mOnmthemoutsidemofmthemendoplasmicmreticulummormthemnuclearmenvelopem(boundmribosomes)



Themendomembranemsystemm-
mCORRECTmANSWERSmregulatesmproteinmtrafficmandmperformsmmetabolicmfunctionsminmthemcell.




Themendomembranemsystemmconsistsmof:m-mCORRECTmANSWERSm•mNuclearmenvelope

•mEndoplasmicmreticulum

•mGolgimapparatus

•mLysosomes

•mVacuoles

•mPlasmammembrane



Thesemcomponentsmaremeithermcontinuousmormconnectedmviamtransfermbymvesicles.



Themendoplasmicmreticulumm(ER)m-
mCORRECTmANSWERSmaccountsmformmoremthanmhalfmofmthemtotalmmembraneminmmanymeukaryoticm


cells.mThemERmmembranemismcontinuousmwithmthemnuclearmenvelope.



TheremaremtwomdistinctmregionsmofmER:m-mCORRECTmANSWERSmSmoothmERmandmRoughmER



SmoothmER,mwhichmlacksmribosomes:m-mCORRECTmANSWERSm•mSynthesizesmlipids

•mMetabolizesmcarbohydrates

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