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Gene Regulation - PowerPoint PPT Presentation


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Gene Regulation. No lactose, high glucose levels. Lac Operon. Repressor doesn’t bind and RNA polymerase makes mRNA. Lactose present, glucose needed. Lactose binds to repressor and changes its shape. Codes for enzyme lactase.

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lac operon

No lactose, high glucose levels

Lac Operon

Repressor doesn’t bind and RNA polymerase makes mRNA

Lactose present, glucose needed

Lactose binds to repressor and changes its shape

Codes for enzyme lactase

slide5

Introns produce microRNA (miRNA) = 20 bp long,

  • attaches to enzymes (Dicer) that destroy mRNA
  • Used to cure diseases: cancer, virus, Huntington’s….