Final answer:
In eukaryotes, promoter specificity and melting are enhanced by the TATA box, CAAT box, and transcription factors.
Step-by-step explanation:
In eukaryotes, the promoter specificity and melting are aided by several elements and proteins. The TATA box is a sequence found in eukaryotic promoters that helps in promoter specificity. It has the consensus sequence TATAAA and is located at -25 to -35 bases from the initiation site. Another element that can be present is the CAAT box, which helps in promoter melting. Additionally, transcription factors are proteins that bind to the promoter region and assist in recruiting the appropriate RNA polymerase.