| 21. | ;RNA viruses : Replication usually takes place in the cytoplasm.
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| 22. | A small number of positive-strand RNA viruses have been described.
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| 23. | The majority of fungal viruses are double-stranded RNA viruses.
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| 24. | Polio is also caused by an RNA virus, but nearly eliminated due to vaccine efforts.
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| 25. | Morphologically, the virus is a double stranded RNA virus that is composed of ten segments.
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| 26. | All RNA viruses use their own RNA replicase enzymes to create copies of their genomes.
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| 27. | Infection by RNA viruses can trigger the RNAi cascade.
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| 28. | Positive-stranded RNA virus transcription is the method of transcription.
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| 29. | Like all RNA viruses, it contains a protein capsid which protects the inner viral RNA.
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| 30. | Replication follows the positive stranded RNA virus replication model.
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