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Which of the following is correct about viroids?

1. They have free RNA without protein coat
2. They have DNA with protein coat
3. They have free DNA without protein coat
4. They have RNA with protein coat

Correct answer: They have free RNA without protein coat

Solution

Viroids are infectious agents made only of short, circular RNA and they lack a protein coat. That is why the statement about free RNA without protein coat is correct.

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