The below mentioned article provides a note on oncogenic virus. Onkos in Greek means a mass or a tumour. Several types of cancer is now known to be caused by viruses. These viruses which include both DNA and RNA animal viruses are called oncogenic. Cancer is a disease characterized by uncontrolled cell multiplication resulting in the formation of a malignant [...]
In this article we will discuss about the viruses that infect insects, fungi and cyanobacteria. Insect Viruses: We know that some of the animal viruses can infect insects. More than 200 different viruses are known to infect various groups of insects. They belong to different viral families of which the three more important are Baculoviridae, Iridoviridae, and Reoviridae. Baculoviridae are [...]
The following points highlight the three main viral agents that cause various diseases. The viral agents are: 1. Viroids 2. Virusoids 3. Prions. Viral Agent # 1. Viroids: Viroids differ from viruses in having no coat enclosing the nucleic acid which in these agents is a small single stranded circular RNA. The naked RNA can infect many plants causing at [...]