Which of the following are acellular infectious microbes

Options

A. Viruses
B. Viroids
C. Prions
D. All

Answer

**Step-by-Step Solution:**

1. **Understanding Acellular Infectious Microbes**:
- Acellular infectious microbes are those that do not have a cellular structure. This means they lack the typical cellular components such as a cell membrane, cytoplasm, and organelles.

2. **Identifying Types of Acellular Infectious Microbes**:
- The main types of acellular infectious microbes include:
- **Viruses**: These are composed of genetic material (DNA or RNA) surrounded by a protein coat. They cannot reproduce on their own and must infect a host cell to replicate.
- **Viroids**: These are small, circular pieces of RNA without a protein coat. They also require a host cell to replicate and are known to infect plants.
- **Prions**: These are infectious proteins that can cause diseases by inducing abnormal folding of normal cellular proteins. Like viruses and viroids, prions need a host to propagate.

3. **Conclusion**:
- Based on the definitions and examples provided, all three types of microbes (viruses, viroids, and prions) are classified as acellular infectious microbes. Therefore, the correct answer to the question is that all of the mentioned options are acellular infectious microbes.

**Final Answer**: All of the following are acellular infectious microbes: viruses, viroids, and prions.

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