Biology – Structure of nucleic acids and replication of DNA | e-Consult
Structure of nucleic acids and replication of DNA (1 questions)
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Adenine and guanine are classified as purine bases. Purines are characterised by a double-ring structure. Cytosine, thymine, and uracil are classified as pyrimidine bases. Pyrimidines are characterised by a single-ring structure.