Promoter regions are located relative to a gene in what direction?

• A. Downstream
• B. Within Exon
• C. Upstream
• D. Promoter region

Answer: (C)

Promoter regions are the sequences that recruit RNA polymerase to start transcription, and they sit upstream of the gene, toward the 5' end relative to the transcription start site. This orientation is necessary so transcription begins at the correct start site and proceeds in the right direction along the DNA. If a promoter were downstream or inside an exon, it wouldn’t properly initiate transcription at the gene’s start. The promoter is a regulatory region that indicates direction; saying “promoter region” doesn’t specify where it sits relative to the gene.