What happens to the lac operon when lactose concentration is high?

A bacterial inducible operon, similar to the lac operon, contains three genes—R, T, and S—that are involved in coordinated regulation of transcription. One of these genes is an operator region, one is a regulatory protein, and the third produces a structural enzyme. In the table below, '+' indicates that the structural enzyme is synthesized and '−' indicates that it is not produced. Use the information provided to determine which gene is the operator, which produces the regulatory protein, and which produces the enzyme.

Genotype                          Enzyme Synthesis
                             Inducer Present      Inducer Absent
R⁺S⁺T⁺                               +                          –
R⁻S⁺T⁺                                –                          –
R⁺S⁻T⁺                                +                          +
R⁺S⁻T⁺                                +                          +
R⁻S⁺T⁺/R⁺S⁻T⁻                      +                          +
R⁺S⁻T⁺/R⁻S⁺T⁻                      +                          +
R⁺S⁺T⁻/R⁻S⁻T⁺                      +                          –

For the following lac operon partial diploids, determine whether the synthesis of lacZ mRNA is 'constitutive,' 'inducible,' or 'uninducible,' and indicate whether the partial diploid is  or  (able or not able to utilize lactose). 

Which of the following is not a part of an operon?

The lac operon encodes genes that are responsible for what?

What happens to the lac operon when the CAP/cAMP complex binds to the CAP binding site?

Glucose concentration can regulate the lac operon?

What are the advantages and disadvantages of using GFP versus lacZ as a reporter gene in mice, C. elegans, and Drosophila?