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Index >> Virus Structure and Classification >> Double Stranded RNA (dsRNA)

Double Stranded RNA (dsRNA)

Double Stranded RNA - dsRNA

It is found in animal viruses like reovirus, the blue tongue virus, the cytoplasmic polyhedrosis virus of insects and retroviruses, and in plant viruses like the wound tumour virus and the rice dwarf virus. In the reovirus, the cytoplasmic polyhedrosis virus of insects and the blue tongue virus the dsRNA consists of 10 or more segments. In the retrovirus there are diploid single strands forming a complex with 7S and 4S RNA of the host cell.

The following generalizations may be made about viral nucleic acids.

1. Bacterial viruses contain ssDNA, dsDNA, ssRNA or dsRNA. Most bacteriophages contain only DNA. MS2 contains ssRNA and φ6 contains dsRNA.

2. Animal viruses contain dsDNA, ssRNA or dsRNA. They do not contain ssDNA.

3. Plant Viruses usually contain only RNA (ssRNA or dsRNA).

 

 

 

 

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