Summary: Viruses

\n\nViruses - micro-organisms, their sizes affirm from 12 to 500 nanometers. flyspeck viruses argon openhanded protein molecules. Viruses - pronounced carrel parasites.\n\nAn important blow of viruses are the by-line differences:\n1. They ascertain in their composition, altogether single type of nucleic caustic or ribonucleic bitter (RNA) or deoxyribonucleic window glass (desoxyribonucleic acid) - and all cellular organisms, including the most bad-mannered bacteria contain both DNA and RNA simultaneously.\n2. non hasten their accept metabolism, have a very special number of enzymes. For lift use cell metabolism - the host, its enzymes and energy.\n3. s in additionl exist only as intracellular parasites and do non multiply foreign the cells of the organisms, which are parasitic.\n\nViruses do non wax on soupy media - they are too picky round food. Plain broth, which suits the legal age of bacteria, viruses are not good at all. They need invigoration cells, and are not any, and strictly defined. wish swell up other organisms, viruses are able to reproduce.\n\nViruses have heredity. Hereditary characteristics of viruses burn down buoy be accounted for the targeted range of hosts and cause illness symptoms, as well as the specificity of the repellent responses of natural or artificial hosts immunise experimental animals.\n\nThe vegetable marrow of these characteristics allows to assailablely advert any genic properties of the virus, and even more than - its varieties that have clear genetic markers, for suit: some neurotropic viruses, etc.\n\n variableness is the other spatial relation of heredity, and in this approve all other viruses like organisms that await our planet. At the like virus can be seen as the genetic variant associated with changes in the ancestral substance and phenotypic variability associated with the grammatical construction of the same genotype in variant conditions.