Final answer:
Enhancers are regulatory elements of DNA sequence that activate and increase the rate of transcription of a particular gene when transcription factors bind them to promoter sequences.
Step-by-step explanation:
Enhancers are regulatory elements of DNA sequence that activate and increase the rate of transcription of a particular gene when transcription factors bind them to promoter sequences. Each enhancer is made up of short DNA sequences called distal control elements. Activators bound to the distal control elements interact with mediator proteins and transcription factors. Enhancers can be located thousands of base pairs away from the genes they control and can be found in the 5' or 3' non-translated region of the gene or even within introns.