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Unformatted text preview: o Many cell divisions Many animal viruses contain RNA rather tan DNA RNA viruses include: cold, measles, mumps, AIDS, Polio RNA Reproductive Cycle o Entry o Uncoating o Viral RNA (genome) o RNA synthesizes by viral enzyme o Protein synthesis or RNA synthesis o Assembly o Exit Emerging viruses: viruses that appear suddenly or are new to medical history Processes Contributing to emerging viruses o Mutating or existing viruses o Spread of one host species to another species (humans to animals, or animals to human) o Viroid: small, circular RNA molecules that infect plans Do not encode proteins but can replicate in host plant cells using cellular enzymes o Prions: cause degeneration brain disease in various animal species Enters the cell containing normal protein molecules and converts them into mis-folded protein versions...
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