Final answer:
Enhancers are distant regions of DNA that enhance transcription by interacting with a gene's promoter. They are binding sequences for transcription factors, and they can loop back to the promoter region and interact with RNA polymerase and activators.
Step-by-step explanation:
Enhancers are distant regions of DNA that can loop back to interact with a gene's promoter and enhance transcription. These enhancer regions are binding sequences for transcription factors. When a DNA-bending protein binds, the shape of the DNA changes, allowing for the interaction of activators bound to the enhancers with the transcription factors bound to the promoter region and the RNA polymerase.