Question

There are three types of RNA pol III promoters (Type 1, Type 2 and Type 3). Two types have internal promoters and one has an upstream promoter. Which type has the upstream promoter?

-no RNA pol III promoters are located upstream of the startpoint of transcription.
-Type I
-Type II
-Type III

Answer 1

Type I promoters for RNA polymerase III are the ones with an upstream promoter, differentiated from Type II and Type III, which contain internal promoters.

Step-by-step explanation:

The type of RNA polymerase III promoter with an upstream promoter is Type I. In eukaryotes, RNA polymerase III is responsible for transcribing various small RNAs, including 5S rRNA, tRNA, and small nuclear RNA genes.

While Type II and Type III have internal promoters that lie within the gene itself, Type I promoters are the ones located upstream of the transcription start site. This is in contrast to the other two types of RNA polymerase III promoters, which have conserved promoter elements within the gene being transcribed, and thus, transcription starts internal to these elements.