The enzyme which cleaves RNA is:

Options

A. DNase
B. ribonuclease
C. ligase
D. protease

Explanation

To solve the question "The enzyme which cleaves RNA is:", we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks for an enzyme that specifically cleaves or breaks down RNA (ribonucleic acid).

2. **Identify the Types of Enzymes**:
- **DNAase**: This enzyme cleaves DNA, not RNA.
- **Ligase**: This enzyme is responsible for joining DNA fragments together, so it does not cleave RNA.
- **Protease**: This enzyme breaks down proteins, not nucleic acids like RNA or DNA.

3. **Identify the Correct Enzyme**: The enzyme that specifically cleaves RNA is called **ribonuclease**. The name itself indicates its function:
- "Ribo" refers to ribonucleic acid (RNA).
- "Nuclease" indicates that it is an enzyme that cleaves nucleic acids.

4. **Conclusion**: Therefore, the correct answer to the question is **ribonuclease**.

### Final Answer:
The enzyme which cleaves RNA is **ribonuclease**.

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