Prions consist mainly of :-

Options

A. Protein
B. DNA
C. RNA
D. Both DNA and RNA

Answer

**Step-by-Step Solution:**

1. **Understanding Prions**: Prions are infectious agents that are primarily composed of protein. Unlike viruses and bacteria, they do not contain any nucleic acids (DNA or RNA).

2. **Nature of Prions**: Prions are misfolded proteins that can induce other normal proteins in the brain to also misfold, leading to a chain reaction of protein misfolding.

3. **Diseases Caused by Prions**: Prions are known to cause several neurodegenerative diseases, such as Bovine Spongiform Encephalopathy (BSE) in cows and Creutzfeldt-Jakob disease in humans.

4. **Lack of Genetic Material**: It is important to note that prions do not have genetic material. They replicate by converting normal proteins into the misfolded prion form, rather than by using DNA or RNA.

5. **Conclusion**: Based on the above points, we can conclude that prions consist mainly of proteins.

**Final Answer**: Prions consist mainly of proteins.

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