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

Structure of nucleic acids and replication of DNA — practice question

Which row identifies two pairs of nucleotide bases in a DNA molecule?

  • Afirst base pair: AT, number of hydrogen bonds: 2; second base pair: CG, number of hydrogen bonds: 2
  • Bfirst base pair: AT, number of hydrogen bonds: 2; second base pair: CG, number of hydrogen bonds: 3
  • Cfirst base pair: TA, number of hydrogen bonds: 3; second base pair: GC, number of hydrogen bonds: 2
  • Dfirst base pair: TA, number of hydrogen bonds: 3; second base pair: GC, number of hydrogen bonds: 3

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