14.3 - Polypeptide Synthesis - Translation

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Synthesising the Polypeptide

  • A ribosome becomes attached to the starting codon at one end on the mRNA molecule.
  • The tRNA molecule with the complementary anticodon sequence moves to the ribosome and pairs up with the sequence on the mRNA. This tRNA carries an amino acid.
  • A tRNA molecule with a complementary anticodon pairs with the next codon on the mRNA. This tRNA molecule carries another amino acid.
  • The ribosome moves along the mRNA, bringing together two


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