Biology 9700 · AS & A Level · Proteins

Proteins — practice question

The diagram outlines the steps involved in synthesising a polypeptide. DNA nucleotide sequence (template strand): TACGACAATCGC mRNA sequence: AUGCUGUUAGCG amino acid sequence: met leu leu ala Which characteristic of the triplet code is shown by the information provided?

  • AAn amino acid can be coded for by more than one triplet.
  • BThe triplet code is non-overlapping and is only read in one direction.
  • CThe triplet code is universal for the DNA of all organisms.
  • DThere are some triplets that code for ‘start’ and ‘stop’.

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