1. Lytic Cycle Lysogenic cycle
Viral Reproduction
Lytic Cycle
Lysogenic cycle

2. Viral Attachment: Lock & Key
Before a virus can inject its genetic material into a cell, it must be able to attach to its host cell.
This attachment occurs through a lock and key mechanism.

3. Lytic Cycle – Short Draw the cycle & summarize each stage in your notes.

4. Lytic Cycle Steps 1. Attach 2. Inject 3. Replicate 4. Assemble
5. Lyse (Release)

5. Lytic Cycle Examples: Common cold Influenza Rabies
Tobacco Mosaic Virus
Timeline of Lytic Cycle Viruses:
Host typically displays symptoms between 3 and 14 days after being infected.

6. Lysogenic Cycle – Long Draw the cycle & summarize each stage in your notes.

7. Lysogenic Cycle Timeline of Lysogenic Cycle Viruses:
Examples:
Herpes simplex → Herpes, Cold Sores
Varicella Zoster Virus → Shingles
Human Papilloma Virus → Warts
Human Immunodeficiency Virus (HIV) → AIDS
Timeline of Lysogenic Cycle Viruses:
Host typically doesn’t show symptoms for an extended period of time after being infected, could be months or years.

8. QUICKDRAW!
From memory, draw the lytic and lysogenic cycles on the next blank page of your notebook.

9. Describe your cycles.
Now using your notes, describe each phase in your drawing.

10. QUICKSHARE! With your elbow partner:
Compare and contrast your drawings and descriptions.
What did they include that you didn’t? (And vice versa)

11. QUICKTEACH!
Find a new partner!
Teach the cycles to your partner!