Which of the following statements is true about a lac operon with this genotype? I^-d O⁺ Z⁺ Y^- A^-

Question

Quizplus · Accepted Answer

The genotype of this lac operon includes the absence of the lac repressor (IS) and the presence of constitutively active promoters (P1 and P0) and an operator site with a mutation that prevents binding of the lac repressor (OS). Additionally, there is a mutation in the structural gene for β-galactosidase (YS) that makes it insensitive to negative regulation by the lac repressor. These mutations together result in a lac operon that is constitutively expressed and is nonrepressible.

Which of the Following Statements Is True About a Lac