Question
Explain the steps of lac operon POSITIVE gene regulation. Start with: the lac operon is currently turned on, but now _________ concentration is low. End with lac operon gene expression is turned up.
Answer
the lac operon is currently turned on, but now glucose concentration is low. This causes the repressor protein to detach from the operator, allowing RNA polymerase to bind to the promoter and transcribe the lac operon genes. As a result, lac operon gene expression is turned up.