RAN-S Mock exam questions and Answers Updated 2026

RAN-S Mock exam questions and
Answers Updated 2026
EukaryoticBpreBmrna'sBundergoBaBnumberBofBmodificationsBsuchBasBcappingBatBtheB5'Bend.B
AB5'Bcap...

a)BConsistsBofBaBmodifiedBterminalBadenineBnucleotide

b)BCarriesBaBnegativeBchargeBinBtheBterminalBbaseBdueBtoBmethylation

c)BPreventsBinitiationBofBtranslation

d)BMarksBtheBmRNABforBtranslation

e)BContainsBaBtriphosphateBbridgeBbetweenBtheBterminalBbaseBandBtheB5'BendBofBtheBpre-
mrnaB-
BAnswere)BContainsBaBtriphosphateBbridgeBbetweenBtheBterminalBbaseBandBtheB5'BendBofBth
eBpre-mrna



WhichBoneBofBtheBfollowingBlistsBofBtranscriptionBfeaturesBappliesBonlyBtoBprokaryotes?

a)BTATABbox,BprimaryBtranscript,BRNABpolymeraseBIII,BtranscriptionBfactors

b)BEnhancer,BbasalBtranscriptionBapparatus,BTATABbox,BZincBfinger

c)BPribnowBbox,BrhoBfactor,BcoreBenzyme,B-35Bregion

d)BPribnowBbox,BtranscriptionalBunit,BrhoBfactor,BrnaBpolymeraseBIII

e)BTATABbox,BrhoBfactor,BcoreBenzyme,B-B35BregionB-BAnswerc



TheBstrandBofBnewBDNABcontainingBOkazakiBfragmentsBisBcalled:

a)BLeadBstrand

b)BLaggingBstrand

c)BSlowBstrand

d)BFastBstrandB-BAnswerLaggingBstrand



InBtheBMeselsonBstahlBDNABreplicationBexperimentB,BwhatBpercentageBofBDNABwasBcompose
dBofBoneBlightBstrandBandBoneBheavyBstrandBafterBoneBgenerationBofBgrowthBinBN-
14BcontainingBgrowthBmedia?

a)B25

b)B50

c)B0

d)B100

, e)B75B-BAnswer50



OriCBisBtoBe.coliBasB____BisBtoByeast:

a)BReplicationBfactories

b)BDNABpolymeraseBdelta

c)BHeterochromatin

d)BAutonomouslyBreplicatingBsequence

e)BOriginBrecognitionBcomplexB-BAnswere)BOriginBrecognitionBcomplex



WhichBoneBofBtheseBRNABmoleculesBservesBasBanBadaptorBmoleculeBduringBtranslation:

a)BtRNA

b)BrRNA

c)BmRNA

d)BnoneBofBthese

e)BtRNABandBmRNAB-
BAnswera)BtRNABservesBasBanBadaptorBmoleculeBduringBtranslation,BasBitBcarriesBaminoBacids
BtoBtheBribosomeBandBmatchesBthemBtoBtheBappropriateBcodonBonBtheBmRNA.



whichBofBtheBfollowingBareBpost-
transcriptionalBmodificationsBinvolvedBinBtheBcontrolBofBgeneBexpression?

a)BNoneBofBthese

b)BAllBofBthese

c)BmRNABprocessing

d)Bmethylation

e)BpolyadenylationB-BAnswerAllBofBthese



whichBoneBofBtheseBfollowingBsitesBmayBbeBthousandsBofBbaseBpairsBfromBaBpromoterBbutBs
tillBregulateBtranscription?

a)BAttenuators

b)BEnhancers

c)BOperators

d)BAllBofBthese

e)BInitiatorsB-BAnswerenhancers