BioCoach Activity

The lac Operon in E. coli


This BioCoach activity will help you understand how gene expression is regulated in bacteria, causing genes to be turned on and off in response to environmental signals. You will find information on how genes in bacteria are grouped together in functional groups called operons, the functions of various segments of DNA in operons, how specific molecules start and stop transcription within operons, and how certain molecules affect the rate of this transcription. Animations in the activity show these processes. You can check your understanding of the lac operon by using the interactive Practice exercises and the Self-Quiz at the end of the module.

Related Review Topics

From Gene to Protein: Transcription

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