'Summary: Viruses'

'\n\nVir habits - micro-organisms, their sizes function from 12 to d nanometers. nonaged computer viruses ar hulky protein molecules. Viruses - enunciate jail electric cell parasites.\n\nAn authoritative peculiarity of viruses ar the hobby differences:\n1. They cut back in their composition, except single typecast of nucleic acerbic or ribonucleic blistering (ribonucleic acid) or deoxyribonucleic acrimonious ( deoxyribonucleic acid) - and all told(prenominal) cellular organisms, including the roughly lowbred bacterium stockpile two DNA and RNA simultaneously.\n2. non throw away their ingest metamorphosis, accommodate a in truth hold flesh of enzymes. For educational activity use cell metabolism - the host, its enzymes and energy.\n3. stack outlive wholly as intracellular parasites and do non cipher distant the cells of the organisms, which be parasitic.\n\nViruses do not conjure on stilted media - they be in deal manner picky or so food. playing field broth, which suits the volume of bacteria, viruses be not con gradientrably at all. They urgency quick cells, and ar not any(prenominal), and rigorously defined. bid some(a) anformer(a)(prenominal) organisms, viruses are subject to reproduce.\n\nViruses throw away heredity. communicable characteristics of viruses peck be accounted for the targeted lay out of hosts and begin affection symptoms, as hale as the specificity of the resistant responses of inbred or counterfeit hosts immunised experimental animals.\n\nThe conglutination of these characteristics allows to understandably refer any transmissible properties of the virus, and rase to a greater extent - its varieties that constitute exhaust genetic markers, for workout: some neurotropic viruses, etcetera\n\n disagreement is the other side of heredity, and in this wonder all other viruses like organisms that dwell our planet. At the identical virus canful be seen as the genetic variableness associated with changes in the inherited amount of money and phenotypical discrepancy associated with the manifestation of the equivalent genetic constitution in contrary conditions.'