DNA-Gyrase enzyme, that participates in the process of DNA-replication is a type of :-

Options

A. DNA ligase
B. DNA topoisomerase
C. Reverse transcriptase
D. DNA polymerase

Answer

To solve the question regarding the type of enzyme that DNA gyrase is, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Role of DNA Gyrase**:
- DNA gyrase is an enzyme that plays a crucial role in DNA replication. It helps in managing the supercoiling of DNA, which is essential for the unwinding of the DNA strands during replication.

**Hint**: Focus on the function of DNA gyrase in DNA replication.

2. **Identify the Options Given**:
- The options provided are:
- DNA ligase
- DNA topoisomerase
- Reverse transcriptase
- DNA polymerase

**Hint**: List out the functions of each enzyme type to compare with DNA gyrase.

3. **Analyze Each Option**:
- **DNA ligase**: This enzyme is responsible for joining DNA fragments together. It does not play a role in supercoiling.
- **DNA topoisomerase**: This enzyme helps relieve the tension in the DNA strand by cutting, twisting, and rejoining the DNA. DNA gyrase is a specific type of topoisomerase (Type II).
- **Reverse transcriptase**: This enzyme synthesizes DNA from an RNA template, which is not related to the function of DNA gyrase.
- **DNA polymerase**: This enzyme is responsible for synthesizing new DNA strands from nucleotides during replication.

**Hint**: Compare the functions of each enzyme with the role of DNA gyrase to find the best match.

4. **Conclude the Correct Answer**:
- Since DNA gyrase is involved in the supercoiling and relaxation of DNA strands during replication, and it is classified as a Type II topoisomerase, the correct answer is **DNA topoisomerase**.

**Hint**: Remember that DNA gyrase is specifically a Type II topoisomerase, which helps in managing DNA supercoiling.

### Final Answer:
The correct option is **DNA topoisomerase**.