Prions are

Options

A. Larger than viruses
B. Abnormally folded genetic material
C. Causal agent of mad cow disease
D. Devoid of proteins

Answer

**Step-by-Step Solution:**

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

2. **Size Comparison**: Prions are similar in size to viruses, not larger. This is an important distinction as it helps to categorize them correctly among infectious agents.

3. **Nature of Prions**: Prions are characterized by their abnormal folding. They are not made of genetic material but are instead misfolded proteins that can induce other proteins to also misfold, leading to disease.

4. **Diseases Caused by Prions**: One of the most well-known diseases caused by prions is Bovine Spongiform Encephalopathy (BSE), commonly referred to as Mad Cow Disease. This disease affects cattle and can have serious implications for both animal and human health.

5. **Correct Statement**: Among the options given, the statement that prions are the causative agents of Mad Cow Disease is correct. The other statements regarding their size, composition, and the presence of proteins are incorrect.

**Final Answer**: Prions are the causative agents of Mad Cow Disease.

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