DNA STRUCTURE AND REPLICATION PRACTICE QUESTIONS AND CORRECT ANSWERS

DNA STRUCTURE AND REPLICATION
PRACTICE QUESTIONS AND CORRECT
ANSWERS

LabelA2eachA2partA2ofA2theA2modelA2toA2theA2rightA2.A2IncludeA2specificA2nitrogenA2baseA2p
airsA2inA2yourA2labelingA2-A2Ans--
Phosphate,A2sugarA2base,A2nitrogenA2base;A2AdenineA2toA2ThymineA2andA2GuanineA2toA2
Cytosine

WhatA2moleculeA2isA2itA2?A2-A2Ans--nucleicA2acid

WhatA2isA2itsA2purposeA2?A2-A2Ans--storesA2geneticA2materials

WhereA2canA2itA2beA2foundA2inA2aA2prokaryoticA2cellA2?A2-A2Ans--nucleolid

WhereA2canA2itA2beA2foundA2inA2aA2eukaryoticA2cellA2?A2-A2Ans--nucleus

ItA2getsA2copiedA2duringA2aA2processA2calledA2replicationA2.A2WhenA2doesA2thisA2happenA2
?A2-A2Ans--duringA2SA2phaseA2ofA2interphase

HelicaseA2-A2Ans--UnzipsA2dnaA2.

PrimaseA2-A2Ans--createsA2shortA2,A2rnaA2primersA2with

DNAA2PolymeraseA2-A2Ans--addsA2nucleotidesA2,A2replacesA2rnaA2withA2dna

LigaseA2-A2Ans--SealsA2theA2gapsA2betweenA2dna

WhatA2enzymeA2synthesizesA2theA2newA2DNAA2strandA2-A2Ans--dnaA2polymerase

WhatA2directionA2doesA2DNAA2polymeraseA2onlyA2travelA2inA2?A2-A2Ans--FromA25A2toA23A2'

ExplainA23A2differencesA2betweenA2theA2leadingA2strandA2andA2theA2laggingA2strandA2.A2-
A2Ans--
leading:A2madeA2continuously,A2newA2strandA2isA2madeA2forward,A2andA2onlyA2needsA2on
eA2rnaA2primer.A2
LaggingA2:A2madeA2discontinuously,A2newA2strandA2isA2madeA2away,A2createsA2OkazakiA2f
ragments

WhatA2areA2theA2fragmentsA2calledA2onA2theA2laggingA2strandA2-A2Ans--
OkazakiA2fragments

WhatA2isA2theA2resultA2ofA2DNAA2replicationA2-A2Ans--TwoA2exactA2replicationsA2ofA2dna