Lytic Cycle Lysogenic cycle Viral Reproduction Lytic Cycle Lysogenic cycle

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.

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

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

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.

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

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.

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

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

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

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