The following points highlight the two main steps involved in the process of reproduction in plant viruses. The steps are: 1. Entry of Virions Into Host 2. Replication. Step # 1. Entry of Virions Into Host: Plant viruses, in general, do not have any specific mechanism for attachment to host cells. They are transmitted passively by several means. Tobacco mosaic [...]
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 [...]
A virus is a pathogenic agent, a infections particle, consisting of a core of nucleic acid (DNA or RNA) enclosed in a protein shell. Viruses are, in general, much smaller than bacteria and have a much smaller genome. But their genetic material is of many varieties, unknown in cellular organisms. Some of these are discussed here. Bacteriophage φX174 which attacks [...]