<prompt> Not present in DNA -UracilThymineCytosineAdenine  <response>: Ans. is a i.e., Uracil o Two types of bases are found in nucleotides : i purines and ii pyrimidines.Purines : Two major purine bases found both in DNAs as well as RNAs are i adenine A and ii guanine G.Pyrimidines : Three major pyrimidine bases are i cytosine C, ii Uracil U and iii Thymine T. Cytosine and uracil are found in RNAs and cytosine and thymine are found in DNAs. Uracil is notfound in DNAs e and thymine is notfound in RNAs.Different major bases with their corresponding nucleosides and nucleotidesBaseRibon ucleosideRibonucleotideAdenine AGuanine GUracil UCytosine CAdenosineGuanosineUridineCytidineAdenosine monophosphate .AMPGuanosine monophosphate GMPUridine monophosphate UMPCytidine Monophosphate CMPBaseDeoxyribonucleosideDeoxyribonucleotideAdenineGuanineCytosineThymineDeoxyadenosineDeoxyguanosincDeoxy cytidineDeoxythymidineDeoxyadenosine monophosphate dAMPDeoxyguanosine monphosphate dGMPDeoxvcytidine monophosphate dCMPDeoxythymidine monophosphate dCMP 