Slide 1  Obligate intracellular parasite  Small: 10-100 nm  Nucleic acid genome  DNA or RNA  single- or double-stranded  Protein capsid  Lipid envelope…

Slide 1 Lecture #12 Bio3124 Slide 2 Prokaryotic Viruses: Bacteriophages Must bind to host cell receptor Must cross a cell wall – G  hosts also cross 2 membranes –…

Slide 1 Viral & Prokaryotic Genetics “Simple” Model Systems Slide 2 Experimental Model Systems for Genetics  characteristics of good model systems  small genome…

Slide 1 1 Viruses Page 328 Slide 2 At the boundary of life, between the macromolecules (which are not alive) and the prokaryotic cells (which are alive), lie the viruses…

Slide 1 Polio Smallpox Mumps Potyvirus infection Tobacco mosaic virus infection Bacteriophage VIRUSES CAUSE DISEASE Herpes simplex type 2 infection Slide 2 What is a virus?…

* Viruses Page 328 CHAPTER 18 * Fig. 18.1, Page 329 1- Viruses are much smaller than bacteria 4- A virus is a genome حامض نووى enclosed in a protective coat غطاء…

Slide 1 Polio Smallpox Mumps Potyvirus infection Tobacco mosaic virus infection Bacteriophage VIRUSES CAUSE DISEASE Herpes simplex type 2 infection What is a virus? -Obligate…

Chapter 18 Notes The Genetics of Viruses and Bacteria Concept 18.1 Researchers discovered viruses through the understanding of tobacco mosaic disease; which stunts growth…

Viruses http://www.molecularmachines.org.uk/ Viruses Much smaller than bacteria (~ 100nm) Obligate intracellular parasites Consist of DNA or RNA covered in a protein coat…