Biology 9700 · AS & A Level · Structure of nucleic acids and replication of DNA

Structure of nucleic acids and replication of DNA — practice question

Which nucleic acid bases are classed as pyrimidines?

  • Aadenine and guanine
  • Badenine, cytosine and thymine
  • Ccytosine, thymine and uracil
  • Dguanine, cytosine and uracil

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