Bacterial genes are often found in operons. Genes in an operon are transcribed as a group and have a single promoter.Each operon contains regulatory DNA sequences, which act as binding sites for regulatory proteins that promote or inhibit transcription.Regulatory proteins often bind to small molecules, which can make the protein active or inactive by changing its ability to bind DNA.Some operons are inducible, meaning that they can be turned on by the presence of a particular small molecule. Others are repressible, meaning that they are on by default but can be turned off by a small molecule. SO THE CORRECT ANSWER IS B