Genteic Control

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  • Created by: emily3
  • Created on: 31-03-14 10:10
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  • Genetic Control
    • Lactose Absent
      • Repressor is free to bind to the operator gene
    • lactose ----(b-galactosidase)------> glucose + galactose
    • Phenlyketonuria
      • Phenlylalanine
        • (enzyme1)     ------>
          • Tyrosine
            • (enzyme2)       ------>
              • intermediate metabolite
                • (enzyme3)     ------>
                  • melanin
            • other       enzymes        ------->
              • other metabolites
                • e.g thyroxine
  • Lactose Present
    • lactose binds to the repressor molecule and inactivates the repressor
      • operator able to switch on the structural gene
        • b-galactosidase produces by structural gene
          • b-galactosidase breaks down lactose
  • Operator gene deactivates the structural gene
    • Repressor is free to bind to the operator gene
    • Productions of b-glactosidase stops
      • No energy wasted
  • other       enzymes        ------->
    • other metabolites
      • e.g thyroxine

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