Unit 3 | Exam 3 | Biology 101 | Study Guide Questions with correct answers 2026

Unit 3 | Exam 3 | Biology 101 | Study Guide
Questions with correct answers 2026


★rMitosis:r-rCORRECTrANSWERSr-
Cellrdivisionrinrwhichrthernucleusrdividesrintornucleircontainingrthersamernumberrofrchromosomes.



★rTherpurposerofrmitosisris...r-rCORRECTrANSWERSr-
torbuildrandrrepairrnewrtissuesr(throughrdivision).



Itrisrimportantrforrthergrowthrandrdevelopmentrofrmulticellularrorganisms.r



Inraddition,rmitosisrisrusedrtorreplacerdamagedrorroldrtissue.



★rSomaticrcellsrare:r-rCORRECTrANSWERSr-"Cellsrofrtherbody."r

-
rAllrcellsrnotrrelatedrdirectlyrtorsexualrreproduction;rsuchrasrskinrcells,rliverrcells,rmusclercells,rbrainr


cells,randrsoron...



★rWhyrdorcellsrreplicate?r-rCORRECTrANSWERSr-Inrorderrforrgrowthr&rtissuerrenewal.



★rInterphaser-rCORRECTrANSWERSr--rRestr&rpreparationrstagerbeforermitosisrduringrthercellrcycle.r



-rDNArreplicationrtorensurerbothrdaughterrcellsrhaverDNA.r



-rGrowthrofrcellsr(morerorganellesrandrmembranerbeingrmade).

,★rCytokinesis:r-rCORRECTrANSWERSr-
Divisionrofrthercytoplasmrtorformrtworseparaterdaughterrcells.



★rWhatrisrG0rphase?r-rCORRECTrANSWERSr-
Knownrasr*cellrcyclerarrest*,rthercellrdoesrnotrwantrtordividerforranrunknownramountrofrtime;ranrex
amplerofrthisrisrthernervercell,rasranradult.



Oncerinterphaserisrdone,rthercellrisrreadyrto...r-rCORRECTrANSWERSr-moverontormitosis.



Atrthisrpointr(rightrafterrinterphase),rthercellrhasrtworcopiedrsetsrofrchromosomesr(DNA)rthatrare...r
-rCORRECTrANSWERSr-readyrtorberseparatedrapartrandrputrintoreachrnewrdaughterrcell.



Thercellrhasrmorerorganellesrandrmembranesrtormakersurerthat...r-rCORRECTrANSWERSr-
thernewrdaughterrcellsrarerofrproperrsize.



★r(Mitosis)rProphaser-rCORRECTrANSWERSr-"Preparing."r

-rThercellrbeginsrtorenterrmitosis.rChromosomesrcondense.rNucleusrdisintegrates.



★r(Mitosis)rMetaphaser-rCORRECTrANSWERSr-"MeetrinrtherMiddle."r

-rChromosomesr(pairrofrsisterrchromatids)rlinerupratrthercenter;rspindlerfibersrattach.



★r(Mitosis)rAnaphase:r-rCORRECTrANSWERSr-"Apart."r

-
rSisterrchromatidsrarerpulledrapartrbyrspindlerfibers;rchromatidsrarerequallyrsegregatedrandrpulledr


toroppositersidesrofrthercell.



★r(Mitosis)rTelophase:r-rCORRECTrANSWERSr-"Tear."r

, -
rChromosomesrreachroppositersides;rspindlerfibersrdisassemble;rchromosomesruncoil;rnuclearrme


mbranerreformsraroundrDNA.



★r(Mitosis)rCytokinesis:r-rCORRECTrANSWERSr-"Cleave."r

-rThercellrpinchesrinwards;rthisrconstrictionrultimatelyrcleavesrthercellrintortwordaughterrcells.



★rListrtherstagesrinrorder.r



(Hint:rPMAT!rNoterthatrcytokinesisrisrnotrarpartrofrmitosis.)r-rCORRECTrANSWERSr-
Prophase,rMetaphase,rAnaphase,rTelophase.



★rMitosisrbeginsrwith:r-rCORRECTrANSWERSr-onerdiploidr(mother)rcell.



Itrresultsrinrtwordiploidr(daughter)rcellsrthatrarergeneticallyridenticalrtoreachrotherrandrtheroriginalr
motherrcell.



★rDNArisrorganizedrby...r-rCORRECTrANSWERSr-
Chromatin,rwhichrisrcoiledrDNA,rthenrcondensedrintorchromosomesrduringrinterphase.r



(DNAr→rChromatinr→rChromosome).



★rHowrisrDNArorganized?r-rCORRECTrANSWERSr-
DNArisrpackagedrintorarmorerorganizedrformrcalledrchromatin.r



Duringrcellrdivisionr(mitosis),rtherchromatinrisrpackagedrandrorganizedrevenrfurtherr(andritrisrcomp
acted)rintorchromosomes.