DNA replication is:-

Options

A. semiconservative, directional and continuous
B. semi conservative, bidirectional and continuous
C. semi conservative, bidirectional and semi discontinuous
D. semi conservative only

Answer

**Step-by-Step Solution:**

1. **Understanding DNA Replication**: DNA replication is the biological process through which a cell makes an identical copy of its DNA. This process is essential for cell division and ensures that each new cell receives a complete set of genetic information.

2. **Defining Key Terms**:
- **Semi-conservative**: During replication, each of the two new DNA molecules consists of one original (parent) strand and one newly synthesized strand. This means that half of the original DNA is conserved in each new molecule.
- **Bidirectional**: DNA replication occurs in two directions from the origin of replication. This means that two replication forks move away from each other, allowing for faster replication.
- **Discontinuous**: The replication of the lagging strand occurs in short segments known as Okazaki fragments, which are later joined together. This is in contrast to the leading strand, which is synthesized continuously.

3. **Analyzing the Options**:
- **Option A**: Semi-conservative, directional, and continuous - This is incorrect because replication is not fully continuous; it is semi-discontinuous.
- **Option B**: Semi-conservative, bidirectional, and continuous - This is also incorrect because, while it is bidirectional and semi-conservative, it is not fully continuous.
- **Option C**: Semi-conservative, bidirectional, and semi-discontinuous - This is the correct option as it accurately describes the nature of DNA replication.
- **Option D**: Semi-conservative only - This is incomplete as it does not address the bidirectional and semi-discontinuous nature of replication.

4. **Conclusion**: The correct answer is **Option C: Semi-conservative, bidirectional, and semi-discontinuous**.

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