Satellite RNA are present in some

Options

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

Answer

**Step-by-Step Solution:**

1. **Understanding Satellite RNA**: Satellite RNA refers to a type of RNA that is dependent on a helper virus for its replication and encapsidation. This means that satellite RNA cannot replicate on its own and requires the presence of a virus to assist in its life cycle.

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

3. **Analyzing Each Option**:
- **Prions**: These are infectious agents composed of misfolded proteins and do not contain nucleic acids (RNA or DNA). Therefore, they cannot contain satellite RNA.
- **Bacteriophages**: These are viruses that infect bacteria and typically contain DNA (either single-stranded or double-stranded). They do not contain satellite RNA.
- **Plant Viruses**: Many plant viruses can have associated satellite RNAs. These satellite RNAs are often dependent on the plant virus for their replication and encapsidation.
- **Viroids**: These are small, circular RNA molecules that can infect plants but are not classified as satellite RNAs. They are independent entities and do not require a helper virus.

4. **Conclusion**: Based on the analysis, the correct answer is **plant viruses**, as they are known to contain satellite RNA.

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

---