translation

• what is translation

  decoding the info in Mrna to synthesise a polypeptide chain with the help of Trna - chain folds into a functional protein
• s1

  ribosome attaches to the Mrna strand at a start codon (AUG)
• s2

  Trna molecule carrying a specific amino acid with anti codon (UAC) that is complementary to the start codon binds to the Mrna
• s3

  second Trna molecule with an anticodon complementary to the next Mrna codon also carrying a specific amino acid attaches to mRNA
• s4

  amino acid carried by the first two trna molecules are linked together via a peptide bond using atp
• s5

  first Trna molecule detaches from Mrna and is free to collect another amino acid for future use
• s6

  ribosomes moves along Mrna allowing another trna molecule which carries the next amino acid to bind to the next codon on the mrna
• s7

  process from s4 to s6 is repeated which elongates the polypeptide chain
• s8

  two trna molecules can be attached to mrna
• s9

  sequence continues until it reaches a stop codon on the mrna is reached . the completed polypeptide chain detaches from the ribosomes