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The smallest pathogens are...

The smallest pathogens are

A

Bdellovibrios

B

Virus

C

Viroids

D

Prions .

Text Solution

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The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding the Options:** - The question asks for the smallest pathogens among the given options: Dallovirus, Vibrios, Virus, Viroid, and Prion. We need to analyze each option to determine which is the smallest. 2. **Analyzing Dallovirus and Vibrios:** - Dallovirus and Vibrios are types of bacteria. Vibrios are gram-negative, comma-shaped bacteria. While they are pathogenic, they are larger than viruses and other smaller pathogens. Therefore, they cannot be the smallest pathogens. 3. **Analyzing Viruses:** - Viruses are infectious agents that can have either DNA or RNA as their genetic material, surrounded by a protein coat called a capsid. While they are smaller than bacteria, they are not the smallest pathogens. 4. **Analyzing Viroids:** - Viroids are similar to viruses but consist solely of RNA without a protein coat. They are indeed smaller than viruses because they lack the capsid. However, they still contain genetic material (RNA). 5. **Analyzing Prions:** - Prions are misfolded proteins that do not contain any nucleic acids (neither DNA nor RNA). They are known to cause neurodegenerative diseases and are considered the smallest pathogens due to their simple structure, consisting only of proteins. 6. **Conclusion:** - Among the options provided, Prions are the smallest pathogens because they consist solely of misfolded proteins without any genetic material. **Final Answer: Prions are the smallest pathogens.** ---
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