PPT-Viruses What is a virus?

Viruses are not alive A virus in an obligate intracellular parasite Requires host cell to reproduce Can be seen at magnifications provided by the electron microscope they are microscopic Characteristics of Viruses. Can Both Survive?. Alex Beutel. , B. . Aditya. . Prakash. , . Roni. Rosenfeld, Christos Faloutsos . Carnegie Mellon University, USA. KDD 2012, Beijing. Competing Contagions. Beutel et. al. 2012. 2. The Great Debate. Beneficial uses for Viruses. - . Gene therapy – using virus mechanics to aid in changing mutated cells. - Cowpox – vaccinations to prevent diseases. - viral symbiosis with gut tract** check facts. A. Viruses are a unique group of biological entities. 1. They are not capable of surviving without a host cell (lack metabolic machinery). 2. They do, however, contain all the information necessary to direct metabolic processes. Intro to viruses. http://www.brainpop.com/health/diseasesinjuriesandconditions/viruses. /. What is a Virus?. Very small . Non-living particle. Made up of nucleic acid. . and proteins. Can only reproduce by infecting living cells. What is a Virus?. Very small . Non-living particle. Made up of nucleic acid. . and proteins. Can only reproduce by infecting living cells. Do not carry out respiration, grow or develop. Structure. Viruses have an inner core which contains either RNA or DNA. Viruses Are Not Cells!. There are several structural and functional differences between cells and viruses. The structural differences include:. No nucleus. No cell membrane. No organelles. The functional differences include:. CLS 212: Medical Microbiology. History. Through the 1800s, many scientists discovered that something smaller than bacteria could cause disease and they called it . virion. (. Latin word- poison. ).. Lecturer. Dr Ashraf Khasawneh. Department of Biomedical Sciences. Virus infections are Universal …….. Introduction to Virology. A virus is an obligate intracellular parasite containing genetic material surrounded by protein. STRUCTURE. A core nucleic acid - DNA or RNA. Nucleic Acid surrounded by a protein, called a capsid.. CLASSIFICATION. By genomes: DNA viruses, RNA viruses or retroviruses . (any . of a group of RNA viruses that insert a DNA copy of their genome into the . Folder Title: . CxVirus. (. NoTP. ). Updated: April 12, 2017. See Chapter 3, Weinberg, 2. nd. Edition pages 71 to 102. Importance of Virology to. Cancer Biology and Cancer Medicine. Need to Control Potentially Infectious Exposure. EQ: Why are viruses considered to be non-
living?. Characteristics:. *Nonliving particles made of . nucleic acid. and a . protein coat . enlosed in a . capsid. shell... *In order to reproduce, all viruses must have a . As a group discuss for 1 minute. Be able to defend your answer for the class!. Are . VIRUSES. alive?. Growth and Development. Reproduce. Change Over Time. Obtain and Use Energy. Maintain Homeostasis. . Outside . their host cells, viruses survive as . virus particles. , also known as . virions. . The . virion. is a . gene delivery . system; it contains the virus genome, and . its functions . are to protect the genome and to aid its . “Computer.” . –. Brad. “Flu.” . –. Sydney. “HPV.” . –. Corley. “No.” . –. Janna. “Zombies.” . –. Lauren. “Ebola to . kno. de . wae. .” . –. Brad. “Amino acids.” .