Biology › Section K · Viruses and prokaryotes › Topic K.2

Virus infection and hosts

A virus outside a cell can do nothing - no metabolism, no growth, no division. Inside a host cell it attaches, gets in, commandeers the machinery, assembles copies and gets out - by paths that differ in bacteria, animals and plants.

In this topic

  • The six-step takeover
  • Attachment and entry
  • Copying the instructions
  • Lytic or lysogenic
  • Exit strategies
  • Animal infections: acute, chronic, latent
  • Viruses that cause cancer
  • Plant viruses and the wall problem
  • Worked example: the case of the inherited phage
  • Worked example: picking a drug target
  • Common mistakes to avoid
  • Key takeaways

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