Is a trp operon an example of positive or negative feedback? Biology Signal Transduction and Control of Gene Expression Lac Operon 1 Answer Tarik Apr 17, 2016 Negative. Answer link Related questions How does the a lac operon switch off? How are lac operons regulated? What is a lac operon? What is a regulatory gene? What is the regulatory gene, or the regulatory elements in an operon? In bacteria, what binds with the repressor to activate the lac operon? Is the lac operon a negative or positive control system? What is the function of the lac-A gene in the lac operon? What is a repressible operon? How does lactose get into an E. coli cell if the lac operon is turned "off" and the cell is not... See all questions in Lac Operon Impact of this question 4200 views around the world You can reuse this answer Creative Commons License