To determine which of the given options describes an infectious protein, we need to analyze each option:

1. **Prion**: This is a type of infectious agent composed solely of protein. Prions are known to cause neurodegenerative diseases by inducing abnormal folding of normal cellular proteins.

2. **Papovavirus**: This is a group of viruses, which contain DNA and are not solely protein-based.

3. **Bacteriophage**: These are viruses that infect bacteria. They consist of genetic material enclosed in a protein coat, so they are not purely protein.

4. **Retrovirus**: This type of virus contains RNA as its genetic material and is also not a protein by itself.

5. **Viroid**: This is a small infectious agent that consists of a short strand of circular RNA and does not code for proteins, though it can interact with host proteins.

### Conclusion:
Among the options provided, **prion** stands out as the infectious agent that is solely composed of protein. Therefore, the correct answer is **prion**.

Question

To determine which of the given options describes an infectious protein, we need to analyze each option:

1. **Prion**: This is a type of infectious agent composed solely of protein. Prions are known to cause neurodegenerative diseases by inducing abnormal folding of normal cellular proteins.

2. **Papovavirus**: This is a group of viruses, which contain DNA and are not solely protein-based.

3. **Bacteriophage**: These are viruses that infect bacteria. They consist of genetic material enclosed in a protein coat, so they are not purely protein.

4. **Retrovirus**: This type of virus contains RNA as its genetic material and is also not a protein by itself.

5. **Viroid**: This is a small infectious agent that consists of a short strand of circular RNA and does not code for proteins, though it can interact with host proteins.

### Conclusion:
Among the options provided, **prion** stands out as the infectious agent that is solely composed of protein. Therefore, the correct answer is **prion**.

Knowee AI · Accepted Answer

To determine which of the given options describes an infectious protein, we need to analyze each option:

1. **Prion**: This is a type of infectious agent composed solely of protein. Prions are known to cause neurodegenerative diseases by inducing abnormal folding of normal cellular proteins.

2. **Papovavirus**: This is a group of viruses, which contain DNA and are not solely protein-based.

3. **Bacteriophage**: These are viruses that infect bacteria. They consist of genetic material enclosed in a protein coat, so they are not purely protein.

4. **Retrovirus**: This type of virus contains RNA as its genetic material and is also not a protein by itself.

5. **Viroid**: This is a small infectious agent that consists of a short strand of circular RNA and does not code for proteins, though it can interact with host proteins.

### Conclusion:
Among the options provided, **prion** stands out as the infectious agent that is solely composed of protein. Therefore, the correct answer is **prion**.

An infectious protein is aGroup of answer choicesprion.papovavirus.bacteriophage.retrovirus.viroid.Next

Question

An infectious protein is a

Solution

Conclusion:

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