1 / 9

VIRUSES

VIRUSES. Chapter 24. HIV. CHARACTERISTICS. Nonliving Do not have cytoplasm or organelles Cannot metabolize Do not grow Cannot reproduce by itself Nucleic acid and protein coat. Sizes and Shapes. Helical Polyhedral Enveloped Complex. Papovaviruses Warts, cervical cancer

minowa
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 Chapter 24 HIV

  2. CHARACTERISTICS • Nonliving • Do not have cytoplasm or organelles • Cannot metabolize • Do not grow • Cannot reproduce by itself • Nucleic acid and protein coat

  3. Sizes and Shapes Helical Polyhedral Enveloped Complex

  4. Papovaviruses Warts, cervical cancer Adenoviruses Respiratory infection Herpesviruses Cold sores, genital warts Poxviruses Smallpox, cowpox Picornaviruses Polio, hepatitis, colds Orthomyxoviruses Influenza a, b, and c Retroviruses AIDS Coronaviruses SARS DNA Viruses and RNA Viruses

  5. Replication in Viruses Lytic Cycle: virus invades a host, produces new viruses and ruptures the host cell releasing new viruses Lysogenic Cycle: allows virus to hide in host for days, and then ruptures

  6. Prions • Infectious protein particles that do not have a genome • Abnormal forms of a natural brain protein • Modes of transmission not fully understood Mad cow disease Scrapie in sheep Chronic wasting disease in deer Creutzfeldt-Jakob Disease (CJD) in Humans

  7. Video TED:Nathan Wolfe's jungle search for viruses (12 min) http://www.ted.com/talks/lang/eng/nathan_wolfe_hunts_for_the_next_aids.html

  8. Works Cited • http://www.sciam.com/article.cfm?id=experts-where-did-viruses-come-fr • http://porpax.bio.miami.edu/~cmallery/255/255chem/255chemistry.htm • http://www.mobilecomputer-service.com/viruses.htm • http://www.biologie.uni-hamburg.de/bzf/mppg/agviroid.htm • http://tangente113.blogspot.com/2008_03_01_archive.html

More Related