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The enzyme capable of cutting DNA molecu...

The enzyme capable of cutting DNA molecule at specific sites is

A

Nuclease

B

Restriction endonuclease

C

Lipase

D

Ligase

Text Solution

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The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding the Question**: The question asks for the enzyme that can cut DNA molecules at specific sites. This requires knowledge of various enzymes and their functions in molecular biology. 2. **Identifying the Options**: The options provided are: - Nuclease - Restriction endonuclease - Lipase - Ligase 3. **Analyzing Each Option**: - **Nuclease**: This is a general term for enzymes that cut nucleic acids (DNA or RNA), but it does not specify cutting at specific sites. - **Restriction Endonuclease**: This enzyme specifically cuts DNA at defined sequences known as restriction sites. It is crucial in genetic engineering and molecular cloning. - **Lipase**: This enzyme is involved in the digestion of fats and is not related to DNA. - **Ligase**: This enzyme joins DNA fragments together, rather than cutting them. 4. **Selecting the Correct Answer**: Based on the analysis, the enzyme that specifically cuts DNA at defined sites is the **restriction endonuclease**. 5. **Conclusion**: Therefore, the correct answer to the question is **restriction endonuclease**. ---
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