Answer:
A(n) <u>operon</u> is a stretch of DNA consisting of an operator, a promoter, and genes for a related set of proteins, usually making up an entire metabolic pathway.
The <u>genes of an operon</u> is/are arranged sequentially after the promoter.
A(n) <u>promoter</u> is a specific nucleotide sequence in DNA that binds RNA polymerase, positioning it to start transcribing RNA at the appropriate place.
A(n) <u>regulatory gene</u> codes for a protein, such as a repressor, that controls the transcription of another gene or group of genes.
Regulatory proteins often bind to the <u>operator</u> to control expression of the operon.
A(n)<u> repressor</u> is a protein that inhibits gene transcription. In bacteria, this protein binds to the DNA in or near the promoter.
A(n)<u> inducer</u> is a specific small molecule that binds to a bacterial repressor protein and changes its shape so that it cannot bind to an operator, thus switching an operon on.