NameDate____

ProteinSynthesisWebquest

Objective:Thepurposeofthisassignmentisto giveyoua betterunderstand ofhowthemessagefound on a moleculeofDNA isusedto build a protein.

Link 1–DNAand RNAComparison

1.Read theinformation presentedon thewebsite andorganizeitinthe followingchart.

NucleicAcid / Sugar / #of“strands” / NitrogenBases / SizeComparison / LocationinCell
DNA
RNA

2.Identifythefunction ofthethreetypesof RNAmolecules.

a.RibsosomalRNA (rRNA)–

b.MessengerRNA(mRNA)–

c.TransferRNA (tRNA)–

Link 2–ProteinSynthesisOverview

3.DefineProtein Synthesis:

4.Summarize theimportanceofproteinsin livingorganisms.

5.Whatarethemonomers (alsocalledbuilding blocksor“subunits”)of theproteinpolymer?

6.SegmentsofDNAwhich codeforproteinsareknownas_.

a.Howdoesthisdescribehowto makeproteins?

7.Generallyspeaking,listthestepswhichallowacelltogofromDNAbuilding a protein.

1. DNAofaspecificgene“unzips”…..

2.

3.

4.

5.

6.

7.

8.Wherein thecell does transcriptionoccur(themaking of RNAfrom DNA)?

9.RNA is readonecodonat atime. A codonconsistsofnitrogenbases.

10.What brings(ortransfers)theproperaminoacidtotheribosome?

11.Aminoacidsarejoinedtogetherbybonds,which explainswhyproteinsarealso sometimesknownas chains.

12.What ultimatelydeterminesthefunctionof a protein?

Link 3–ProteinSynthesisIllustrations

13.Read and clickslides1–4.Use slide4to draw apicture ofan unzipped andexposedgenebeing usedtocreate amoleculeofmRNAduringtranscription.Besure tolabelboththeDNAand RNAsequences,pairing thecorrectcomplementarybases.

14.HowdoesthemRNAmoleculeleavethenucleus?

15.Practicetranscriptionbybuilding a moleculeofRNAbyusing DNA asa“template.”Give thecomplementarysequencebelow.

DNASequence:TACCCGAGG

RNASequence:

16.Clickand readslides1–8.Use slides8and9to help you drawseveral transfer RNA(tRNA)molecules.Be sure tolabel the anticodon,thebindingsite, and theattachedamino acid.

17.Clickand readslides9–14.Using slide14, illustratehowthemRNAmoleculeis“read”and usedtobuild apolypeptidechain(protein) duringtranslation.Labelthefollowing terms: ribosome, mRNA,tRNA,codon,anticodon,aminoacid,growingpolypeptidechain.

18.What happens to themRNAmoleculewhenprotein production is complete?

Link4- FinalAnalysis

19.Use thediagramin thebottomrightcorner.In summary,what IS transcription?

20.Use thediagramin thebottomrightcorner.In summary,what IS translation?

21.Use thediagramin thebottomrightcorner. Drawthediagramwhichillustratesthe entireprocess(DNARNAProtein).Labelallmajorparts!!

22.Build theprotein using thegivenDNAsequenceand thechartseenontherightof thewebpage.Whatis thefinalamino acid sequence?

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