Question

Which conserved motifs are found in E.coli genes?

• A. TATA box
• B. CAAT box
• C. Pribnow box
• D. All of the above

Answer 1

The correct option is C Pribnow box

• Pribnow box also called TATAAT box is a consensus sequence present 10 bases upstream on the left side of the start point in the promoter region of prokaryotes.
• The sequence is 5' TATAAT 3' and shows a difference 45 to 96% among prokaryotes.
• As it is present 10 base pair upstream this sequence is called -10 sequences.
• TATA box and CAAT box are found upstream to the start site in eukaryotes, not in prokaryotes (E.coli).

Thus, the correct answer is option C.