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Exam (elaborations)

ANSC 257 Final Exam Review Questions and Answers Updated 2026

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ANSC 257 Final Exam Review Questions and Answers Updated 2026

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ANSC 257 Final Exam Review
Questions and Answers Updated
2026
TranscriptionB-BAnswerisBtheBtransferringBofBgeneticBinformationBfromBDNABtoBRNA



WhichBofBtheBfollowingBisBcorrectBaboutBRNABchainBelongationBduringBtranscription?

a.BRNABpolymeraseBunwindsBtheBDNABaheadBofBitBandBrewindsBtheBDNABbehindBit.B

b.BRNABPolymeraseBaddsBnucleotidesBthatBareBcomplementaryBtoBtheBtemplateBstrandBofBDN
A

c.BNucleotidesBareBaddedBtoBtheBgrowingBchainBofBRNABmolecule,BoneBnucleotideBatBaBtime

d.BallBofBtheBaboveB-BAnswerD



GivenBtheBtemplateBstrandBofBDNA,B3'-GCTAAGGTCGA-
5',BwhatBwouldBbeBtheBnucleotideBsequenceBofBtheBRNABtranscriptBobtainedBfromBthisBtempl
ateBstrand?B-BAnswer5'-CGAUUCCAGCU-3'



TranslationBis...B-BAnswertheBtransferringBofBgeneticBinformationBfromBRNABtoBprotein



WhatBareBexons?B-
BAnswertheBcodingBsequencesBofBaBgeneB(expressedBsequencesBthatBareBtranslated)



InBEukaryotes,Bpre-
mRNABshouldBgoBthroughBaBprocessBcalledBsplicing,BduringBwhichBintronsBareBremovedBbyBs
plicingBreactionsBcarriedBoutBby...B-BAnswerSpliceosomes



WhichBofBtheBfollowingBRNABmoleculesBareBstructuralBcomponentsBofBspliceosomes?

a.BsmallBnuclearBRNAsB(snRNAs)

b.BmessengerBRNAB(mRNA)

c.BribosomalBRNAB(rRNA)

d.BTransferBRNAB(tRNA)B-BAnswersmallBnuclearBRNAsB(snRNAs)



InBorderBtoBinitiateBRNABsynthesis,BRNABPolymeraseBrequiresBassistanceBfromBotherBproteinsB
knowBas...B-BAnswerTranscriptionBFactors
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