1 / 18

How fast can you find your match?

How fast can you find your match?. You picked up a cut piece of construction paper on your way in. Someone in this classroom has your match! They should fit together like puzzle pieces.

tannar
Download Presentation

How fast can you find your match?

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. How fast can you find your match? • You picked up a cut piece of construction paper on your way in. • Someone in this classroom has your match! • They should fit together like puzzle pieces. • You have 30 seconds to find your match! Once you find each other, stand next to each other until the time is up. • First pair to find each other gets a prize!

  2. Remember! Viruses are specific! Once a virus attaches to a cell, what happens?

  3. Viral Reproduction

  4. Viral Infections • Once a virus enters a host cell, 1 of 2 processes will occur: • Lysogenic Cycle • Lytic Cycle

  5. The Lytic Cycle

  6. The Lytic Cycle • Viral DNA (or RNA) is injected into the host cell • Host cell begins to make mRNA from the viral DNA • Viral proteins shut down the host cell’s regular functions • Cell is used to make thousands of viruses • Host cell bursts (lyses) & releases viruses to infect other cells This is a cell lysing. Viruses burst out of the cell!

  7. The Lysogenic Cycle

  8. The Lysogenic Cycle • Viral DNA (or RNA) is injected into the host cell • DNA is integrated (joined) into the host DNA • Host cell continues dividing with the virus DNA • Eventually, the viral DNA can be triggered to enter the Lytic Cycle! Cold sores are caused from a type of herpes virus. This virus enters the Lysogenic Cycle, but can enter the Lytic Cycle if your immune system is weakened. This is when you get a cold sore!

  9. The Lytic & Lysogenic Cycles

  10. Which cycle will spread the viral infection? • Lytic Cycle • Lysogenic Cycle • Both Both!

  11. Which cycle can cause disease? • Lytic Cycle • Lysogenic Cycle • Both Both!

  12. Which cycle will assemble new viruses? • Lytic Cycle • Lysogenic Cycle • Both The Lytic Cycle!

  13. Which cycle is more sneaky? • Lytic Cycle • Lysogenic Cycle • Both The Lysogenic Cycle! Even if the cold sore goes away, the virus never does…

  14. What is the correct sequence of events of the Lytic Cycle? Try to do this without looking at your notes. Use logic! • Injection, Transcription, Translation, Assembly, Lysis • Injection, Assembly, Translation, Transcription, Lysis • Lysis, Assembly, Injection, Transcription, Translation • Assembly, Transcription, Translation, Lysis, Injection A. Injection, Transcription, Translation, Assembly, Lysis

  15. RNA Viruses • RNA viruses do not have built in proofreading, so they mutate & evolve QUICKLY! • A special type of RNA virus, a retrovirus, can cause DNA to be made from their RNA. • Some cancers & AIDS are caused by retroviruses! Human Immunodeficiency Virus

  16. Before you leave… • Answer the following question on the back of your handout: Which cycle do you consider to be more dangerous? Lytic or Lysogenic? Defend your answer!

More Related