Question

RNA pol II promoter: Which of the following core promoter elements is present in both TATAA-less promoters and in promoters that contain a DPE?

A) 3
B) All
C) 1
D) None
E) 2

Answer 1

The question addresses elements present in both TATAA-less promoters and promoters containing a DPE involved in RNA polymerase II transcription initiation. Option 3.

Step-by-step explanation:

The student's question seems to involve core promoter elements linked with transcription initiation by RNA polymerase II. Specifically, the question touches on promoter elements that would be present in both TATAA-less promoters and promoters containing a DPE (downstream promoter element).

While the original question provided seems to have incomplete information, we can deduce that core elements like the TATA box, initiator elements, and DPE might be involved.

Promoters in eukaryotes may have various combinations of these elements, and even TATAA-less promoters must have core elements that facilitate the binding of transcription factors and RNA polymerase II to ensure proper initiation of transcription.

Each promoter element, including the TATA box, initiator elements, and DPE, plays a specific role in transcription initiation.

The TATA box functions as a binding site for TFIID, a complex that recruits other transcription factors. The DPE, typically found downstream of the transcription start site, also associates with transcription factors that facilitate RNA polymerase II's binding to the promoter.

So Option 3.