Pribnow box is consensue of ______ bases forming a binding site for E.coil RNA polymerase.

Options

A. TATAAT
B. AGGAGG
C. CAAT
D. GC

Answer

To answer the question regarding the Pribnow box, we can break down the solution into the following steps:

### Step-by-Step Solution:

1. **Understanding the Pribnow Box**: The Pribnow box is a specific sequence of nucleotides found in the promoter region of bacterial DNA. It plays a crucial role in the initiation of transcription by serving as a binding site for RNA polymerase.

2. **Identifying the Sequence**: The Pribnow box is characterized by a consensus sequence of six nucleotides. This sequence is known to be "TATAAT".

3. **Components of the Sequence**: In the sequence "TATAAT":
- "T" stands for Thymine.
- "A" stands for Adenine.
- The sequence consists of a total of 6 bases.

4. **Function**: The Pribnow box is essential for the transcription process in bacteria, as it is where RNA polymerase binds to initiate the synthesis of RNA from the DNA template.

5. **Conclusion**: Therefore, the Pribnow box is a consensus of **6 bases** forming a binding site for E. coli RNA polymerase.

### Final Answer:
The Pribnow box is a consensus of **6 bases** forming a binding site for E. coli RNA polymerase.

---