- byjus.com/neet-questions/why-does-dna-contain-thymine-and-rna-uracil says Uracil cannot be repaired by DNA repair mechanisms. But it is also requires less energy to synthesize with.
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A nucleotide is the basic building block of nucleic acids, which are essential molecules in living organisms. Nucleotides serve as the monomers that link together to form DNA (deoxyribonucleic acid) and RNA (ribonucleic acid).