Viruses - Norwell High School
CH 2 L 1 Virus NotesNovember 14, 2013Viruses
CH 2 L 1 Virus NotesNovember 14, 2013REVIEW
CH 2 L 1 Virus NotesNovember 14, 2013
CH 2 L 1 Virus NotesNovember 14, 2013Key Concepts:- How do viruses differ from living things?- What is the basic structure of a virus?- How do viruses multiply?Key Terms: virus, host, parasite, bacteriophage
CH 2 L 1 Virus NotesNovember 14, 2013VirusesVirus - a tiny, nonliving particle thatinvades and then reproduces inside aliving cellWhy is a virus a nonliving particle?
CH 2 L 1 Virus NotesNovember 14, 2013(influenza virus)Why is a virus a nonliving particle?- viruses don't have cells- they do not use their own energy to growor to respond to their surroundings- cannot make their own food, take infood, or produce waste- their only similarity to an organism is thatthey are able to multiply
CH 2 L 1 Virus NotesNovember 14, 2013Host - is an organism that provides asource of energy or suitable environmentfor a virus or another organism to live.Parasite - an organism that lives on or in ahost and causes harm to the hostHow is a virus act like a parasite?
CH 2 L 1 Virus NotesNovember 14, 2013How is a virus like a parasite?Viruses multiply only when they areinside a living cell, then destroythe cell
CH 2 L 1 Virus NotesNovember 14, 2013Virus ShapesBacteriophage - is a virus that infectsbacteria. Its name means "bacteriaeater" - robotlike shapeother shapes of virus are round, rodshaped, bricks, threads, or bullets
CH 2 L 1 Virus NotesNovember 14, 2013What can you conclude from the size ofviruses?- Viruses are measured in nanometers (nm)- The smallest is 20 nm in diameter andlargest is 200 nm in diameter- The average virus is smaller than thesmallest bacteria
CH 2 L 1 Virus NotesNovember 14, 2013Stucture of VirusesAll viruses have two basic parts:- a protein coat that protects the virus- an inner core made of genetic materialouter membrane proteins- geneticmaterialMembrane
CH 2 L 1 Virus NotesNovember 14, 2013Stucture of VirusesGenetic material contains instructionsfor making new virusesProtein coat protects the virusThe virus has an outer membrane orenvelopeThe outer membrane proteins aresurface proteins that allows the virus toattach to the host
CH 2 L 1 Virus NotesNovember 14, 2013How Viruses Multiply
CH 2 L 1 Virus NotesNovember 14, 2013How Viruses MultiplyA virus attaches to the host cellA virus injects its genetic materialVirus instructs cell to produce thevirus's proteins and genetic materialThe protein and genetic material assembleinto new viruses that fill the hostThe host burst open, releasingnew viruses, and the host dies
CH 2 L 1 Virus NotesNovember 14, 2013Differences between Active and Hidden VirusesActive viruses goes into action immediatelyHidden viruses enter the cell, its genetic materialbecomes a part of the cell's genetic material.Then under certain conditions, the virus's geneticmaterial suddenly comes alive. It becomes anactive virus.
CH 2 L 1 Virus NotesNovember 14, 2013Usefulness of VirusesGene therapy - Scientists add genetic material to avirus and then use the virus as "messenger service" todeliver the genetic material to cells that need it.
CH 2 L 1 Virus NotesNovember 14, 2013
Virus - a tiny, nonliving particle that invades and then reproduces inside a living cell Why is a virus a nonliving particle? CH 2 L 1 Virus Notes November 14, 2013 Why is a virus a nonliving particle? - viruses don't have cells . deliver the genetic material to cells that need it.
Viruses have an inner core of nucleic acid surrounded by protein coat known as an envelope Most viruses range in sizes from 20 – 250 nm Viruses are inert (nucleoprotein ) filterable Agents Viruses are obligate intracellular parasites
of computer viruses. It thus appears that the concept of computer viruses is a novelty in scientific literature at this point, and that little effective protection against viruses is currently available. We begin the discussion of viruses with an informal discussion based on an English language definition.
Viruses are inert (nucleoprotein ) filterable Agents Viruses are obligate intracellular parasites Viruses cannot make energy or proteins independent of a host cell Viral genome are RNA or DNA but not both. Viruses have a naked capsid or envelope with attached proteins Viruses do
viruses are used to demonstrate that viruses are a formidable threat in both normal and high secur- ity operating systems. The paths of sharing, transi- tivity of information flow, and generality of infor- mation interpretation are identified as the key properties in the protection from computer viruses,
South Shore Regional School 72 Graduates 73 Library 74 PUBLIC SAFETY Police Department 75 Fire Department & Ambulance 76 PUBLIC WORKS Highway and Tree Departments 78 Norwell Cemetery Committee 79 Water Commissioners 79 HEALTH & HUMAN SERVICES Board of Health 81 Council on Aging 81 Cushing Center 83
theory to viruses. Viruses defined as infectious sub cellular and ultra microscopic particles, whose transmission land replies causes reactions in the last cells. Viruses cannot be visible without the aid of electron microscope. Viruses lack the internal organization which is the characteristics of a cell.
Chapter 2 Virus, Bacteria, Protista, Fungi.notebook 1 April 19, 2018 Jan 21 2:32 PM complete petri dishes Chapter 2 Viruses, Bacteria, Protists, and Fungi Viruses Lesson 1 Objectives Name and describe the characteristics of viruses and how they multiply. Discuss both positive and negative ways that viruses
Adventure tourism consumption refers to tourists experiences of actually consuming adventure activities while on holiday, and the benefits gained from these experiences. Adventure is often all-consuming and challenging and this means it can prompt diverse and conflicting emotions, ranging from feelings of fear and risk to deep satisfaction and elation (Swarbrooke, Beard, Leckie & Pomfret, 2003 .
