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13 Cards in this Set

  • Front
  • Back

Virus

Latin for "Poison"

Dimitri Ivanovski (1892)

Discovered Tobacco Mosaic

Tobacco Mosaic

1st viral Disease

Martinus Beijernick

Discovered the first virus

Virus characteristics

-Most scientists considered them non-living


*Cannot Reproduce on their own


* Contain:
1.) Particle of DNA and RNA


2.) A protein coat


3.) Fats or Lipids

Virus Characteristics

* Can reproduce, but needs another cell to do it


* Has many shapes and sizes


* Viruses only attack certain types of cells and can only attach to certain cells

Lytic cycle of Infection


(Most Common)

1.) Attaches to cell


2.) Injects DNA/RNA


3.) DNA takes over cells DNA and makes new viruses


4.)Cell Bursts (Lyses)


5.) New viruses are released and attach to new cells

Lysogenic Cycle

Virus embeds itself into cells DNA and become a part of it


*Host cells burst right away


Ex.) Chicken Pox, Shingles, HIV, and Herpes



Vaccines

Dead or weakened forms of a virus that prevent people from getting the actual virus



Edward Jenner

Created the first vaccine for the smallpox by using cowpox

Oncogenic Viruses

Causes Cancer

Retroviruses

Contain RNA and makes DNA that it needs later

Prions

Particles with no DNA or RNA, but still cause disease


Ex.) Mad Cow, Chronic Wasting, and ( CJD)