The diagram below shows a DNA duplex. The template strand is identified, as is the location of the  nucleotide. If this region is a eukaryotic gene transcribed by RNA polymerase III, where are the promoter consensus sequences located? <>

Key Concepts

Eukaryotic Gene Structure

Eukaryotic genes typically consist of coding regions called exons and non-coding regions known as introns. The transcription of these genes is initiated at specific sites called promoters, which are located upstream of the coding sequence. Understanding the structure of eukaryotic genes is essential for identifying where transcription begins and how RNA polymerase interacts with the DNA.

RNA Polymerase III

RNA polymerase III is one of the three main types of RNA polymerases in eukaryotic cells, primarily responsible for transcribing small RNA molecules, including tRNA and 5S rRNA. It recognizes specific promoter sequences that are distinct from those used by RNA polymerase II, which transcribes mRNA. Knowing the role of RNA polymerase III helps in understanding the transcription process of certain genes.

Promoter Consensus Sequences

Promoter consensus sequences are short, conserved sequences of nucleotides that are recognized by transcription factors and RNA polymerase to initiate transcription. In eukaryotic genes transcribed by RNA polymerase III, these sequences are typically located upstream of the transcription start site. Identifying these sequences is crucial for understanding how genes are regulated and expressed.