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

Structure of nucleic acids and replication of DNA — practice question

A diagram may be used to show some relationships between different nucleic acid bases. Which row is correct for the words that can be inserted at positions 1-5?

  • Aadenine, purine, cytosine, pairs with, guanine
  • Bcytosine, purine, guanine, pairs with, uracil
  • Cguanine, pairs with, cytosine, pyrimidine, thymine
  • Dthymine, pairs with, uracil, pyrimidine, adenine

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