Satellite RNA are present in some

Options

A. Plant viruses
B. Viroids
C. Prions
D. Bacteriophages

Answer

To solve the question regarding the presence of satellite RNA, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Satellite RNA**: Satellite RNA is a type of RNA that is dependent on a helper virus for its replication and encapsulation. This means that it cannot replicate or form its own protective coat without the presence of another virus.

2. **Identify the Options**: The options provided are:
- Plant viruses
- Viroids
- Prions
- Bacteriophages

3. **Analyze Each Option**:
- **Plant Viruses**: These are known to sometimes contain satellite RNAs. They can act as parasites to the main virus and require the helper virus for their life cycle.
- **Viroids**: These are small, circular RNA molecules that can replicate independently and do not require a helper virus.
- **Prions**: These are infectious proteins and do not involve RNA at all.
- **Bacteriophages**: These are viruses that infect bacteria, and while they can have complex interactions, they do not typically involve satellite RNA.

4. **Conclusion**: Since satellite RNA is specifically associated with plant viruses, the correct answer to the question is **plant viruses**.

### Final Answer:
Satellite RNA are present in some **plant viruses**.

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