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 isolation, assay and cultivation of viruses. Isolation of Viruses: Viruses are isolated from infected host cells containing mature virions. The cells are mechanically disrupted and the cell contents are released in a suitable buffer solution. The suspension containing the virions and cell ingredients is then subjected to centrifugation for several times at [...]
In recent years, biologists have discovered certain living units called viruses. They are so small that they cannot be recognised even with the help of an ordinary microscope. But they exhibit certain properties, for example, the ability to reproduce their kind, which are normally associated with life. The viruses can now be seen with the modern electron microscope. They resemble [...]