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Question :Listthecrteriaamoleculethat canactas geneticmaterialmustfulfill. Whichoneofthecritriaarebestfulfilledby DNAorbyRNAthusmakingoneof thema better gentic materialthan canother ? Explain .

Answer»

SOLUTION : A MOLECULETHE can actgeneticmustfulfill thefollowingcritra.
1.Itshouldbe ableto replicate .
2.It shouldbechemicallyandstructurallystable .
3.It shouldprovidechancefor mutationthatis required forevolution
4. it shouldbe ableto express itselfin theformof GENES .
DNAis morestablethanRNAandbettersuitedforstorge of geneticinformationwhileRNAis moresuitablefor thetransmissionofgenticinformationbecause ,
1.BothDNAand RNAcan replicaate .
2.presenceof thyminein placeofUracilmakesDNAmorestable
3.Presence2, -OH groupin RNAmakesit morelabile RNA is alsocatalytic and morereactive,DNAis chemically andstructurally more stable .
4.RNAmutatesfaster than DNAsinceit isunstable.
5.RNAcan directlycodeforprotein synrthesiswhileDNA is dependant on RNAforproteinsythesisthisshowsthatproteinsythesishasevolvedaround RNA .


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