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Mark the incorrect option w.r.t. lac operon
(1) Is under positive as well as negative control
(2xControls catabolic pathway
(3) Shows feed back repression
(4) Discovered by Jacob and Monod
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Lac operon doesn't show feedback repression due to the following reasons :
- Lac operon shows regulation with the help of two different proteins .
- Lac operon consists of promoter and repressor .
- Promoter activity is controls the expression of lac operon .
• It shows two types of control
(1) Negative control : Here protein prevents transcribing of RNA polymerase .
(2)Positive control : Here the protein enhances RNA polymerase binding to the promoter.
Hence , Option (3) is the incorrect answer
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