Biology 9700 · AS & A Level · Proteins

Proteins — practice question

A transcription error causes one nucleotide to be removed from the centre of a primary transcript. mRNA is produced from the primary transcript. Which statement describes one possible consequence of this deletion for the protein translated from this mRNA?

  • AThe protein will be unchanged as the same amino acids can be coded by another codon formed by the deletion.
  • BThe tertiary structure of the protein is not affected as only one amino acid has been changed by the deletion.
  • COnly one amino acid has been changed by the deletion but this changes the quaternary structure of the protein.
  • DThe sequence of amino acids in the protein will be different as all the codons from the deletion onwards are changed.

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