Which of the Following is the Most Common Promoter Element

Question

Which of the following is the most common promoter element for pol II?
A)CAAT box (GGCCAATCT)
B)GC box (GGGCGG)
C)TRE (GAGGGACGTACCGCA)
D)TATA box (TATAAAA)
E)Octamer (ATTTGCAT)

Accepted Answer

The TATA box (TATAAAA) is the most common promoter element for pol II. It is located approximately 25 nucleotides upstream of the transcription start site and is recognized by the TATA-binding protein (TBP), which is part of the transcription factor complex TFIID. The TATA box helps to position RNA polymerase II correctly for transcription initiation.