Cell Bio Exam 1 Questions and Answers Updated 2026

Cell Bio Exam 1
Questions and Answers
Updated 2026
WhatBdoesBcellBtheoryBstate?B-
BAnswerB1.BAllBlivingBcreaturesBareBmadeBofBoneBorBmoreBcells

2.BTheBcellBisBtheBbasicBstructuralBunitBofBlivingBthings

3.BOnBtoday'sBEarth,BcellsBcanBonlyBariseBbyBdivisionBfromBpreexistingBcells



WhatBareBsomeBbasicBpropertiesBofBcells?B-BAnswerB-
BBeingBcomposedBofBproteins,Blipids,BcarbohydratesBandBnucleicBacids

-BHavingBaBhighBdegreeBofBcomplexity

-BEncodingBinformationBinBgenes

-BBeingBdelineatedBfromBtheBrestBofBtheBworldBbyBaBmembrane

-BBeingBableBtoBreproduceBthemselves

-BBeingBableBtoBacquireBandButilizeBenergy

-BBeingBableBtoBcarryBoutBaBvarietyBofBchemicalBreactions

-BBeingBableBtoBcarryBoutBmechanicalBactivities

-BBeingBableBtoBrespondBtoBstimuli

-BBeingBcapableBofBself-regulation

-BBeingBcapableBofBevolving

-BDoBNOTBneedBtoBhaveBALLBofBtheseBqualities



WhatBisBtheBCentralBDogmaBofBCellBBiology?B-
BAnswerB1.BActivationB2.BTranscriptionB(pre-
mRNABmade)B3.BProcessingB(matureBmRNA)B4.BTranslation

,WhatBisBtheBgeneticBflowBofBinformation?B-
BAnswerBDNABcodesBforBmRNAB(codesBforBproteinBsequence)BandBforBsmallBRNABspe
ciesB(regulateBtheBstabilityBofBmRNA)



WhatBisBaBgeneralBprincipleBtrueBinBmostBcases,BbutBnotBalways?B-
BAnswerBOneBgeneBcodesBforBoneBprotein

NotBalwaysBtrue:BGenesBcanBbeBsplicedBalternatively,BproteinsBcanBbeBcleavedBintoBm
ultipleBactiveBspecies



ProteinsBfoldBintoBspecificBshapesBtoBmakeBwhat?B-BAnswerB-
Enzymes,BwhichBcarryBoutBchemicalBreactions

-BStructuralBproteinsB(whichBprovideBorganization)

-BRegulatoryBmoleculesB(whichBprovideBinformation)



ChangesBinBDNABproduceBwhat?B-
BAnswerBproduceBheritableBchangesBinBproteinBstructureBandBfunction



WhatBareBproteins?B-BAnswerBworkhorsesBofBcells-BtheyBdoBmostBeverythingBcellsBdo



HowBareBgenomesBdecoded?B-
BAnswerBWeBcanB"read"BtheBsequencesBencodingBproteinsBtoBpredictBtheBcompleme
ntBofBproteins-BtheB"proteome"-BofBmanyBorganisms



HowBmanyBproteinsBdoesBitBtakeBtoBmakeBaBcell?B-BAnswerB-
BProkaryote:BminimumB477BinBMycobacteriaB(parasite).BTypically:B1000-4000

-BEukaryote:BSimpleBsingle-celled:B6300;BComplexBmulticellular:B30,000



DoBallBproteinsBmakeBupBgenes?B-
BAnswerBNo,BsomeBgenesBserveBtoBregulateBtheBexpressionBandBfunctionBofBotherBg
enesB(Be.g.BtranscriptionBfactors,Bpost-
translationalBregulation).BTheseBregulatoryBnetworksBareBveryBhardBtoBtrace.

, IsBallBinformationBcodedBdirectlyBinBDNABsequences?B-
BAnswerBSomeBinformationBisBnotBcodedBdirectlyBinBDNABsequences



WhatBisBepigenetics?B-
BAnswerBChangesBinBgeneBexpressionBorBcellularBphenotype,BcausedBbyBmechanismsB
otherBthanBchangesBinBtheBunderlyingBDNABsequence.BThisBgivesBriseBtoBimprinting,B
heritableBchangesBinBgeneBexpression.BOtherBkindBofBepigeneticBphenomenaBthatBem
ergeBfromBinteractionsBofBproteinsBwithBeachBotherBandBwithBtheBenvironment



WhatBisBanBexampleBofBanBepigeneticBeffect?B-
BAnswerBPolarizationBofBproteins:BsuspendedBcellBvs.BorganizedBcell



WhatBisBtheBdifferenceBbetweenBprokaryotes,BeukaryotesBandBprotists?B-
BAnswerBProkaryotes:BlackBaBnucleusBandBinternalBmembranes

Eukaryotes:BhaveBaBnucleusBandBanBextensiveBinternalBmembraneBsystem

Protists:BsingleBcellBorganisms



WhatBisBtheBplasmaBmembrane?B-BAnswerBLipidBbilayer-
BboundaryBofBcellBthatBallowsBitBtoBcreateBanBinternalBenvironmentBdifferentBfromBth
eBexternalBenvironment.

-
BSpecialBsystemsBexistBtoBtransportBbothBsmallBandBlargeBmoleculesBcrossBthisBbarrie
r



WhatBisBtheBcytoplasm?B-BAnswerBtheBsolubleBinternalBcontentsBofBtheBcell



WhatBisBtheBnucleoid?B-BAnswerBareaBinBwhichBDNABisBconcentrated



WhatBisBtheBextracellularBmatrix?B-
BAnswerBmaterialBmadeBbyBcellsBandBdepositedBoutsideBtheBplasmaBmembraneB(Cell
Bwall,BLipopolysaccharideBcapsule)