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- DescriptionMter the discoveryof the tobacco mosaic virus by D. I. Ivav skU in 1892 , the new science of virology was born and began to develop rapidly. The number of viruses w kwn is ermous and they can infect nearly all animal and plant organisms. Microorganisms themselves are exception to this rule. Despite intensive study of Vlruses, their origin and nature are still a subject for speculation and hypothesis. The general concept of viruses embraces a wide group of biologically active structures occupying an intermediate position between living and nliving matter. The dual character of viruses is determined by the fact that, while they do t possess an inde pendent system of metabolism, which is a characteristic feature of every living being, they nevertheless carry within themselves all the necessary information for autoreproduction. A striking feature of the virus is that it consists essentially of two components: a protein envelope and the nucleic acid con tained within it. In contrast to the elementary structural unit of the living or ganism, the cell, which contains two types of nucleic acid (DNA and RNA), the virus particle contains only one type of nucleic acid - either DNA or RNA. It is perhaps this which is responsible for the imperfection of the virus as a living organism.
- Author(s)Anna S Tikhonenko
- Date of Publication25/02/2012
- FormatPaperback / softback
- Country of PublicationUnited States
- Content Noteblack & white illustrations, bibliography
- Weight413 g
- Width152 mm
- Height229 mm
- Spine17 mm
- Format DetailsTrade paperback (US),Unsewn / adhesive bound
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