The lac Operon in E. coli
Concept 9: Energy Source Preferences of E. coli
Practice (1 page)
Practice (1 page)
Concept 10: The Effect of Glucose and Lactose on the lac Operon
Practice (1 page)
Practice (1 page)
Concept 11: : The Effect of Glucose and Cyclic AMP on the lac Operon
Concept 11: The Effect of Glucose and Cyclic AMP on the lac Operon
The presence or absence of glucose affects the lac operon by affecting the concentration of cyclic AMP.
The concentration of cyclic AMP in E. coli is inversely proportional to the concentration of glucose: as the concentration of glucose decreases, the concentration of cyclic AMP increases.
 Animate
Cyclic AMP is derived from ATP.
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