chapter 18 - o New viruses form within cell and usually...

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Chapter 18 – The Genetics of Viruses and Bacteria Ability to crystallize viruses indicated that they were not cells o Genetic material surrounded by a protein capsid shell, occasionally with a viral envelope, usually derived from host cell Bacteriophages (phages) – viruses that infect bacteria Viruses lack metabolic enzymes and other equipment needed to reproduce Virus enters a host cell, then uses host cell’s organelles and energy to reproduce
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Unformatted text preview: o New viruses form within cell and usually result in cell death o Called the “lytic” cycle o Virulent pathogens reproduce only by the lytic cycle • Lysogenic cycle – virus reproduces without killing its host • Temperate phages can use both the lysogenic and the lytic cycle •...
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