Viruses

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Viruses

• The nonliving

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Viruses

• Considered nonliving
• No cells (cell basic unit of life)
• ? no organelles
• Do not carry out respiration
• Cannot reproduce on their own
• But do have some characteristics of living things
• Genetic code (DNA or RNA)
• Reproduction (with host)

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Viruses

• Have 2 main parts
• Genetic material (DNA or RNA)
• Capsid (protective protein coating)

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Reproduction

• Viruses need living cells to act as hosts in
  order to survive
• Virus must attach to the host cell
• Insert its genetic material
• Replicate (takes over the cell)
• Release more viruses
• Two cycles
• Lytic
• Lysogenic

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