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Gene Regulation Prokaryotes (no nucleus). Lac operon System of genes that can turn on and off in E. coli (bacteria). These genes make enzymes that break.

Published byJuliana Goodman Modified over 9 years ago

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Presentation on theme: "Gene Regulation Prokaryotes (no nucleus). Lac operon System of genes that can turn on and off in E. coli (bacteria). These genes make enzymes that break."— Presentation transcript:

1 Gene Regulation Prokaryotes (no nucleus)

2 Lac operon System of genes that can turn on and off in E. coli (bacteria). These genes make enzymes that break down the sugar in milk (lactose). Regulatory genes~ genes that affect other genes (make them turn on or off) Structural genes~genes that code for a protein

3 Structure of the Lac operon Structural gene #1S g #2S g #3Operator “region” (gene) Promoter “region” (gene)Inhibitor/repressor (gene) Regulatory genes

4 Function of the Lac operon Structural gene #1S g #2S g #3 Operator “region” (gene) Promoter “region” (gene)Inhibitor/repressor (gene) Regulatory genes

5 inhibitorpromoterSG 1SG2SG3? operator RNA polymerase Repressor (protein) Lactose Proteins that break down lactose

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