Question

Which DNA sequence element is found at the 5' end of a transcription unit and serves as the binding site for RNA polymerase?

Options

• Structural Gene

• Intron

• Terminator

• Promoter

Answer 1

The Promoter is a DNA sequence located at the 5' end (upstream) of the transcription unit that provides a binding site for RNA polymerase and initiates transcription. In eukaryotes, the promoter characteristically contains a TATA box, while in prokaryotes it contains a Pribnow box.