Which of the following enzyme is know as molecular secissors

Options

A. Ligase
B. DNA polymerases
C. Restriction enzyme
D. Helicase

Answer

To determine which enzyme is known as "molecular scissors," let's analyze the options provided:

1. **Understanding the Term "Molecular Scissors":**
- The term "molecular scissors" refers to an enzyme that can cut DNA at specific locations. This is crucial in genetic engineering for manipulating DNA.

2. **Evaluating the Options:**
- **Ligase:** This enzyme is responsible for joining DNA fragments together. It does not cut DNA, so it cannot be considered molecular scissors.
- **DNA Polymerases:** These enzymes are involved in synthesizing new DNA strands. They add nucleotides to a growing DNA strand but do not cut DNA, so they are not molecular scissors.
- **Restriction Enzyme:** Also known as restriction endonuclease, this enzyme cuts DNA at specific sequences. This is the function that aligns with the term "molecular scissors."
- **Helicase:** This enzyme unwinds the DNA double helix during replication. It does not cut DNA, so it is not molecular scissors.

3. **Conclusion:**
- The enzyme that is known as "molecular scissors" is the **restriction enzyme** (option C).

### Final Answer:
The enzyme known as molecular scissors is the **restriction enzyme** (option C).