Which of the following specific DNA sequence is responsible for initiating replication ?

Options

A. Vector site
B. Restriction enzymes action site
C. Ori site
D. Palindromic site

Answer

To determine which specific DNA sequence is responsible for initiating replication, we can analyze the provided options step by step:

1. **Understanding the Options**:
- **Option A: Vector** - Vectors are tools used to introduce foreign DNA into host cells. They do not initiate replication themselves.
- **Option B: Restriction Enzyme** - These enzymes cut DNA at specific sequences but do not play a role in initiating replication.
- **Option C: ORI site** - The ORI (Origin of Replication) is a specific sequence where replication begins. This is the site where the DNA unwinds and replication machinery assembles.
- **Option D: Palindromic Site** - Palindromic sequences are those that read the same forwards and backwards. While they are important for certain functions in DNA, they are not specifically responsible for initiating replication.

2. **Identifying the Correct Answer**:
- From the analysis, the ORI site (Option C) is specifically known as the "origin of replication," where the replication process starts.

3. **Conclusion**:
- The specific DNA sequence responsible for initiating replication is the ORI site.

**Final Answer**: The ORI site (Origin of Replication) is responsible for initiating replication.

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