Viruses & BacteriaViruses & Bacteria

Chapter 17Chapter 17

Biology 11Biology 11Presentation put together by Mandie Presentation put together by Mandie

Lynn WallsLynn Walls

What are Viruses

A virus is a non-cellular particle made up of genetic material and

protein that can invade living cells.

T4 BacteriophageT4 Bacteriophage

The Structure Of a VirusThe Structure Of a Virus

Viruses are Viruses are composed of a core composed of a core of nucleic acidof nucleic acid

The Nucleic acid core The Nucleic acid core is surrounded by a is surrounded by a protein coat called a protein coat called a capsidcapsid

The Nucleic core is The Nucleic core is either made up of either made up of DNA or RNA but DNA or RNA but never bothnever both

List of Diseases Caused by List of Diseases Caused by VirusesViruses

•Cold•Flu•Smallpox•Measles•Mumps•AIDS•Eboli•Chicken Pox

•Viral pneumonia•Fever blisters•Mononucleosis•Rabies•Hepatitis •Gastrointestinitis•Warts

How are Viruses Transmitted?How are Viruses Transmitted?

•A cold can spread by coughing and/or sneezing•Touching or shaking hands •Touching food with dirty hands will also allow viruses or bacteria from the intestine to spread•Body fluids, such as blood and saliva can contain the infecting organisms and transmission of such fluids can cause the spread of the virus