1 / 10

Viruses

Viruses. Viruses. Non living Cannot reproduce on their own Reproduction Need a host cell Extremely small. Viral Structure. No nucleus Genetic Material DNA or RNA Capsid around outside. Viral Reproduction. Viruses need a specific host cell Virus injects DNA or RNA into cell

dillon
Télécharger la présentation

Viruses

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. Viruses

  2. Viruses • Non living • Cannot reproduce on their own • Reproduction • Need a host cell • Extremely small

  3. Viral Structure • No nucleus • Genetic Material • DNA or RNA • Capsid around outside

  4. Viral Reproduction • Viruses need a specific host cell • Virus injects DNA or RNA into cell • Cell produces more viruses • Host cell is destroyed at end of viral reproduction

  5. Viral Transmission • Airborne • Sexual Contact • Contaminated food or water • Animal bites

  6. Human Immunodeficiency Virus (HIV) • Attacks Helper T Cells • T-Cells fight disease • Disables immune system • Person dies from secondary infection • Transmitted • Sexual contact • Sharing needles

  7. Influenza • Transmitted by • Coughing • Sneezing • Contact • Symptoms • Fever • Headache • Severe aches and pains • Fatigue • Etc

  8. Do antibiotics work on viruses? • No • They are not living

  9. Vaccines • Small amount of inactive virus • Help to prep body to defend against viruses

  10. Reflection Questions • 1. If you have a viral infection should you take antibiotics? Why or why not? • Name at least two viruses. • What does a virus need to reproduce?

More Related