Biology 9700 · AS & A Level · Proteins

Proteins — practice question

The table gives the DNA triplet codes for certain amino acids. A section of the template DNA strand that codes for part of a polypeptide is shown below. CCA ACG GCG TTA TTC GCA During DNA replication, two mutations take place in this sequence. Which changed template DNA strand would produce a shorter polypeptide?

  • ACCA ACA GCA TTA TTC GCA
  • BCCA ACG CCG TTA TTC GCC
  • CCCA ACG GCG TTG ATC GCA
  • DCCT ACG GCG TTA TTC GGA

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