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Virology
Virus Introduction
What are Viruses?
Obligate intracellular pathogens that:
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Cannot make their own energy
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Depend on a Host Cell's biochemical machinery for it's:
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replication
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transcription
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translation
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Vocabulary
Virus
A broad umbrella term for any aspect of this type of infectious agent, including:
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Infectious or inactivated virus particle
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Viral nucleic acid & protein in an infected cell
Virion
Physical particle in the extracellular phase, able to spread to new host cells
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Complete intact virus particle
How Small Are Viruses?

Comparison of Characteristics of
Infectious Microorganisms

Structure of a Virus
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