A) TATA box to start point
B) TATA box to stop codon
C) Start point to stop codon
D) 35 sequence to start point
Correct Answer: B
Solution :
The transcription unit is that stretch or sequence of DNA that is transcribed into a single RNA molecule. A typical transcription unit has a promoter, a start site, a coding region and a terminator sequence at the end. Promoter is that sequence of a transcription unit where RNA polymerase binds and initiates transcription. E. coli promoter have the following is consensus sequences [a] Start point is the site within a promoter from which transcription begins. [b] - 10 sequence is 10 bP upstream of the start point and has consensus sequence TATAAT. This is commonly known as Pribnow box. [c] - 35 sequence is on 35 bP upstream of the strat point. It has consensus sequence TTGACA. [d] The distance between -10 to -35 sequences is 16-18 and seems to be critical for proper orientation of RNA polymerase during transcription initiation.You need to login to perform this action.
You will be redirected in
3 sec