Viruses to Cells

By: Julie Kim

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Animal cell

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Plant cell

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Lytic cycle

  1. Attach
  2. Entry
  3. Replication
  4. Assembly
  5. Release

Lysogenic cycle

  1. Attach/Enter cell
  2. Virus DNA incorporated into host cell DNA
  3. Cell divides and each new daughter cell has viral DNA
  4. The virus becomes active and enters Lytic cycle

Characteristics of life

Viruses can't ...

  • Reproduce
  • Move
  • Eat
  • Have metabolism or respiration
  • Cellular structure
  • Maintain homeostasis
Viruses can...
  • Evolve
  • Have DNA or RNA


1. Describe the typical structure of a virus. What is a virus made of? What biomolecules

would you find in a virus?

Viruses have a protein cost called capsid, DNA or RNA, some enzyme and some have lipid membrane

2. Discus different ways virus enters cell

They can attach to the membrane and injects DNA/RNA , virus and envelope fuse allowing virus to enter cell

3. Explain why the Ebola virus would not infect a tobacco plant.

Tobacco plants have antibodies that would be immune in a way to the Ebola virus

4.Name five viruses and the type of cell that they attack.

Ebola - liver cells

HIV- T cells

Rabies - blood cells

Influenza- epithelial cells

Swine flu- epithelial cells

5. You have been diagnosed with the flu. Explain why a doctor will not provide you

with a prescription for antibiotics in order to cure infection.

Antibiotics won't work because the virus isn't living to begin with, you can kill something that isn't alive.

Instead they can give a vaccine to prevent or weaken the virus

6. How is it that a person can be infected with a virus such as HIV and not exhibit


It isn't a virus that affects right away so it may take some time because of the virus itself