Eukaryotes and Viruses. Chapters 12 and 13. Viral Characteristics and Structure. Why Viruses aren’t Alive. General Characteristics of Viruses. Name derives from the Latin for “poison” Obligatory intracellular parasites Referred to as filterable Contain a single type of nucleic material
Chapters 12 and 13
Why Viruses aren’t Alive
1 μm in diameter
How do you do a taxonomy of something that isn’t alive?
No, not 1 becomes 2, more like 1 becomes 1000.
Attachment to plasma membrane proteins and glycoproteins.
Capsid enters cells
Capsid removed by enzymes
Biosynthesis in nucleus or cytoplasm
Enveloped viruses bud and nonenveloped rupture.
One of many factors
PrPC + PrPSc 2 PrPSc