E Coli Cells Are Placed in a Growth Medium Containing $\beta$

Essay

E. coli cells are placed in a growth medium containing lactose. Indicate how the following circumstances would affect the expression of the lactose operon (increase/decrease/no change).
(a) Addition of high levels of glucose
(b) A Lac repressor mutation that prevents dissociation of Lac repressor from the operator
(c) A mutation that inactivates $\beta$ -galactosidase
(d) A mutation that inactivates galactoside permease
(e) A mutation that prevents binding of CRP to its binding site near the lac promoter