Molecular Biology - Exam II Material - Practice Questions and Answers Updated 2026

Molecular Biology - Exam II Material -
Practice Questions and Answers
Updated 2026
ProcessingBofBpre-mRNABtoBmakeBmRNABinvolves_____B

a.BSplicingBoutBexonsBfromBtheBprimaryBtranscriptB

b.BAddingBaBPoly-ABtailBtoBtheB5'BendB

c.BAddingBaBG-capBtoBtheB3'BendB

d.BUsingBaBspliceosomeBtoBcutBoutBtheBintronsB-
BAnswerd.BUsingBaBspliceosomeBtoBcutBoutBtheBintrons



WhichBofBtheBfollowingBdoBsnRNPsBbindBto?B

a.BExonBonlyB

b.B5'BendBofBtheBintronBonlyB

c.B3'BendBofBtheBintronBonlyB

d.B5'BandB3'BendsBofBtheBintronB-BAnswerd.B5'BandB3'BendsBofBtheBintron



TheBproteinBencodedBbyBDrosophilaBdoublesexB(Dsx)BgeneBisBregulatedBby___B

a.BAlternativeBsplicingB

b.BExonBshufflingB

c.BRNABeditingB

d.BCappingB-BAnswera.BAlternativeBsplicing



WhichBofBtheBfollowingBisBanBexampleBofBRNABediting?B

a.BRemovalBofBintronsBfromBanBRNABtranscriptB

b.BDegradationBofBanBRNABmoleculeBbyBnucleasesB

c.BAlterationBofBtheBnucleotideBsequenceBofBanBRNABmoleculeB

d.BCappingBofBtheB5'BendBofBanBRNABtranscriptB-
BAnswerc.BAlterationBofBtheBnucleotideBsequenceBofBanBRNABmolecule



WhichBofBtheBfollowingBprocessesBdoesBNOTBoccurBinBtheBeukaryoticBnucleus?B

a.BRNABsplicingB

, b.BDNABreplicationB

c.BRNABcappingB

d.BtRNABchargingB(i.e.,BsynthesisBofBamino-acylBtRNAs)B-
BAnswerd.BtRNABchargingB(i.e.,BsynthesisBofBamino-acylBtRNAs)



AccordingBtoBtheBwobbleBhypothesis,BaBUBinBtheBfirstBbaseBofBanBanticodonBcanBpairBwithB

a.BUBorBCB

b.BABorBGB

c.BA,BC,BorBGB

d.BOnlyBAB-BAnswerb.BABorBG



HowBmanyBaminoacyl-tRNABsynthetasesBareBpresentBforBtheBtRNABcharging?B

a.B1B

b.B3B

c.B20B

d.B61B-BAnswerc.B20



TheBShine-DalgarnoBsequenceBisBfoundBinBthe_____B

a.BSmallBribosomalBsubunitB

b.BLargeBribosomalBsubunitB

c.BInitiatorBtRNAB

d.BmRNAB-BAnswerd.BmRNA



WhichBfeatureBisBNOTBfoundBinBbacterialBmRNABa.B5'BuntranslatedBregionB

b.Bpoly-ABtailBatBtheB3'BendB

c.BPolycistronicBmRNAB

d.BShine-DalgarnoBsequenceB-BAnswerb.Bpoly-ABtailBatBtheB3'Bend



WhichBenzymeBisBincorrectlyBmatchedBtoBitsBfunction?B

a.BRNABpolymeraseB--BtranscriptionB

b.Baminoacyl-tRNABsynthetaseB--BattachesBanBaminoBacidBtoBaBtRNAB

c.BPoly-ABPolymeraseB--translationB