Biology › Section K · Viruses and prokaryotes › Topic K.1
Viral evolution, structure, and classification
Too small to see, too simple to be alive: how viruses were discovered, where they may have come from, and how the Baltimore scheme files them by their genomes.
In this topic
- Discovery: the disease that slipped through the filter
- Where did viruses come from?
- Anatomy of a virion
- Four body plans
- Naked versus enveloped
- Attachment: keys looking for locks
- Worked example: reading two virus descriptions
- Viral genomes: small, varied, error-prone
- The Baltimore scheme: classifying by mRNA
- Worked example: assigning Baltimore groups
- Common mistakes to avoid
- Key takeaways
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