Operons and Gene Transcription Quiz

Operons control the transcription of genes by containing regulatory DNA sequences that act as binding sites for regulatory proteins that promote or inhibit transcription. These proteins can be activated or deactivated by small molecules, which can turn operons on or off.

Inducible operons are activated in the presence of a particular small molecule, while repressible operons are generally on but can be turned off by a small molecule.

The purpose of operons is to organize genes into groups so that they can be transcribed as a group and have a single promoter. The regulatory DNA sequences within the operons also control the transcription of genes by binding to regulatory proteins that promote or inhibit transcription.