Biology 9700 · AS & A Level · Proteins

Proteins — practice question

The three mRNA stop codon sequences are given below. $\text{UAA}\quad \text{UAG}\quad \text{UGA}$ Which mutation in the template (transcribed) strand of a DNA sequence that codes for a polypeptide would make translation end too soon?

  • A$\text{ATT}$ changed to $\text{ATC}$
  • B$\text{ACT}$ changed to $\text{ACA}$
  • C$\text{ACC}$ changed to $\text{ATT}$
  • D$\text{ATC}$ changed to $\text{TAG}$

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