31. It is a prodrug of ribavirin, active against a number of DNA and RNA viruses . 32. These are not currently classified as RNA viruses and are described on their own pages. 33. RNA viruses can be placed into four different groups depending on their modes of replication.34. Most DNA viruses assemble in the nucleus while most RNA viruses develop solely in cytoplasm. 35. Replication follows the negative stranded RNA virus replication model. 36. Related to but distinct from the RNA viruses are the viroids and the RNA satellite viruses. 37. Louping ill virus is a flavivirus ( RNA virus ), also known as sheep encephalomyelitis virus. 38. An exception to the rule of small genome sizes in RNA viruses is found the Nidoviruses. 39. The phloem limited positive sense RNA virus infects potatoes and other members of the family Solanaceae. 40. Replication follows the positive-stranded RNA virus replication model.
