Molecular scissors, which cut DNA at specific site is

Options

A. Pectinase
B. Polymerase
C. Restriction endomuclease
D. Ligase

Answer

To answer the question "Molecular scissors, which cut DNA at specific site is," we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Term "Molecular Scissors":**
- The term "molecular scissors" refers to enzymes that can cut DNA at specific locations. These enzymes are crucial in biotechnology for manipulating genetic material.

2. **Identifying the Type of Enzyme:**
- The specific type of enzyme that acts as molecular scissors is known as "restriction endonucleases." These enzymes recognize specific sequences of nucleotides in the DNA and cut the DNA at these sites.

3. **Understanding Restriction Sites:**
- Restriction endonucleases cut DNA at specific sequences known as "restriction sites." Each restriction enzyme has a unique recognition sequence where it will make a cut.

4. **Example of a Restriction Site:**
- For instance, a common restriction site might be a sequence like 5' - A G G C C T - 3'. The enzyme will cut the DNA at this specific sequence, resulting in two separate DNA strands.

5. **Conclusion:**
- Therefore, the answer to the question is that the molecular scissors which cut DNA at specific sites are "restriction endonucleases."

### Final Answer:
The correct answer is **restriction endonucleases**.