In a chromosome there is a specific DNA sequence which is responsible for initiating replication is

Options

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

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for a specific DNA sequence in a chromosome that initiates the process of DNA replication.

2. **Identifying the Key Term**: The term we are looking for is related to the initiation of DNA replication. This is a critical aspect of molecular biology.

3. **Defining the Origin of Replication**: The specific DNA sequence responsible for initiating replication is known as the "origin of replication." This is the site where the replication process begins.

4. **Characteristics of the Origin of Replication**:
- In prokaryotes (like E. coli), there is typically a single origin of replication, referred to as "oriC."
- In eukaryotes, there are multiple origins of replication, often numbering in the thousands, allowing for efficient replication of larger genomes.

5. **Importance in Biotechnology**: The origin of replication is crucial in recombinant DNA technology. When a DNA fragment needs to be propagated, a vector that contains an origin of replication is used to ensure that the DNA is copied during cell division.

6. **Final Answer**: Therefore, the specific DNA sequence in a chromosome that is responsible for initiating replication is called the "origin of replication" or "ori site."

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