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Sec. 4 the dna connection
 

Sec. 4 the dna connection

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    Sec. 4 the dna connection Sec. 4 the dna connection Presentation Transcript

    • The DNA ConnectionTranslation of theGenetic Code -Protein SynthesisBy Mr. Hamdy Karim
    • A U G G G C U U A A A G C A G U G C A C G U UThe Genetic CodeThis is a molecule of messenger RNA.It was made in the nucleus bytranscription from a DNA molecule.mRNA moleculecodon
    • A U G G G C U U A A A G C A G U G C A C G U UHow Cells Make ProteinA ribosome on the rough endoplasmicreticulum attaches to the mRNAmolecule.ribosome
    • A U G G G C U U A A A G C A G U G C A C G U UIt brings an amino acid to the first threebases (codon) on the mRNA.Amino acidtRNA moleculeanticodonU A CA transfer RNA molecule arrives.The three unpaired bases (anticodon)on the tRNA link up with the codon.
    • A U G G G C U U A A A G C A G U G C A C G U UAnother tRNA molecule comes intoplace, bringing a second amino acid.U A CC C GIts anticodon links up with the secondcodon on the mRNA.
    • A U G G G C U U A A A G C A G U G C A C G U UA peptide bond forms between thetwo amino acids.Peptide bondC C GU A C
    • A U G G G C U U A A A G C A G U G C A C G U UThe first tRNA molecule releases its aminoacid and moves off into the cytoplasm.C C GU A C
    • A U G G G C U U A A A G C A G U G C A C G U UC C GThe ribosome moves along the mRNA tothe next codon.
    • A U G G G C U U A A A G C A G U G C A C G U UAnother tRNA molecule bringsthe next amino acid into place.C C GA A U
    • A U G G G C U U A A A G C A G U G C A C G U UA peptide bond joins the secondand third amino acids to form apolypeptide chain.C C G C C G
    • A U G G G C U U A A A G C A G U G C A C G U UThe polypeptide chain gets longer.G U CA C GThe process continues.This continues until a termination(stop) codon is reached.The polypeptide is then complete.MutationsIt has been Covered in the last class. Have a nice final Test.