Category: viruses

Tobacco Mosaic Virus

Tobacco Mosaic Virus (TMV) Disease The tobacco mosaic disease is caused by a rod-shaped virus, the tobacco mosaic virus (TMV). Structure & Features of Tobacco Mosaic Virus (TMV) It is about 300 nm long and 15 nm in diameter and consists of a single strand of RNA protected with a capsid formed of protein sub-units. [Continue]


Bacteriophages Systematic:    Position Division:        Vira Subdivision:   De-oxyvira Class:            Deoxybinala Order:           Virales Sub-order:     Phagineae Name:           Bacteriophage Bacteriophages are viruses that infect bacteria. They were discovered independently by Frederick W. Twort in England in 1915 and by Felix d’ Herelle at the Pasteur’s [Continue]


Viruses It can be defined as non-cellular infectious entities which contain RNA or DNA encased in protein coat and reproduce only in living cell. History of Discovery of Viruses The word VIRUS is derived from latin word venome means poisonous substance, was used to describe any disease-causing substance. About 50 years before development of the [Continue]