A Bacterium Has the Following Lac Operon Genes Located on the Chromosome

question 29

Essay

A bacterium has the following lac operon genes located on the chromosome: I⁺P⁻Z⁻Y⁻A^+. On a plasmid,this same bacterial cell has the lac genes I⁻P⁺Z⁻Y⁺A^−. Which protein products will be made from lac genes in response to the presence of lactose? What type of protein expression (induced or constitutive)will there be for each protein that is made?

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