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

Structure of nucleic acids and replication of DNA — practice question

A short DNA fragment that was 15 base pairs in length was examined in order to determine the number of nucleotide bases in each polynucleotide strand. Some of the outcomes are shown below. How many nucleotides containing guanine were present in strand 1?

  • A2
  • B3
  • C4
  • D6

Worked solution & mark scheme

This 1-mark question has a full step-by-step worked solution and mark scheme.

  • Full mark scheme, point by point
  • Step-by-step worked solution
  • Write your answer & get it marked instantly by AI