Translation of the Genetic Code: Protein Synthesis

• Messenger RNA is made in the nucleus by transcription from a DNA molecule. 
• A ribosome on the rough endoplasmic reticulum (RER) attaches to the mRNA molecule.
• A transfer RNA molecule arrives and brings an amino acid to the first three bases (codon) on the mRNA.
• The three unpaired bases (anticodon) on the tRNA link up with the codon.
• Another tRNA molecule comes into place bringing a second amino acid
• Its anticodon links up with the second codon (next three bases) on the mRNA
• A peptide bond is formed between the two amino acids
• The first tRNA molecule releases its amino acid and moves off into the cytoplasm
• The ribosome moves along the mRNA to the next codon
• Another tRNA molecules bring in the next amino acid into place
• A peptide bond joings the second and third amino acid to form a polypeptide chain
• The process continues - polypeptide chain gets longer, this continues until termination (stop) codon is reached then the polypeptide is complete