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Plant viruses can sometimes host smaller parasitic entities known as satellites. These satellite RNAs rely on their helper virus for replication and packaging. An example is the Tobacco Necrosis Virus (TNV). Which of the following statements is accurate?

1. Viroids are smaller infectious agents compared to viruses.
2. Bacteriophages are viruses that specifically target bacteria.
3. Prions are infectious agents made mainly of protein.
4. All of the statements mentioned are correct.

Correct answer: All of the statements mentioned are correct.

Solution

A is correct because viroids are smaller than viruses and are infectious RNA molecules. B is correct because bacteriophages infect bacteria, and C is correct because prions are infectious protein particles. Since all three statements are true, the best answer is that all of them are correct.

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