Protein Synthesis

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  • Protein Synthesis
    • 1) Transcription
      • In the Nucleus
      • 1. Section of the DNA is unwound by an enzyme and the 2 stands separate
        • Hydrogen bonds are broken
      • 2. Free RNA nucleotides attach with DNA, they then join together by sugar phosphate bonds
        • RNA - Ribonucleic acid
      • mRNA strand is formed it peels of the DNA and leaves the nucleus and goes into the cytoplasm
        • mRNA - Messenger RNA
        • In the RNA strand the bases A,C,G remain but T is replaced with U
    • 2) Translation
      • In the cytoplasm
      • 1. The  mRNA attaches to a ribosome
        • Ribosome - Site of Protein synthesis
      • 2. Each mRNA codon,codes for a specific amino acid
        • Codon - Set of 3 bases
      • 3. An anti - codon (tRNA) matches with the corresponding codon
        • tRNA - Carries the Anti-codon and amino acid
        • A with U      G with C
      • 4. tRNA continue to attach to the next codon in the chain and the amino acids form a peptide bond with each other
        • Eventually this forms a polypeptide bond which is the Protein
      • 5. After the amino acid joins another, the tRNA leaves and looks for another amino acid.


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