Virus Structure PDF

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About Science Prof Online PowerPoint Resources Science Prof Online (SPO) is a free science education website that provides fully-developed Virtual Science Classrooms, science-related PowerPoints, articles and images. The site is designed to be a helpful resource for students, educators, and anyone interested in learning about science. The SPO Virtual Classrooms offer many educational resources, including practice test questions, review questions, lecture PowerPoints, video tutorials, sample assignments and course syllabi. New materials are continually being developed, so check back frequently, or follow us on Facebook (Science Prof Online) or Twitter (ScienceProfSPO) for updates. Many SPO PowerPoints are available in a variety of formats, such as fully editable PowerPoint files (.ppt), as well as uneditable versions in smaller file sizes, such as PowerPoint Shows (.pps) and Portable Document Format (.pdf), for ease of printing. The font “Jokerman” is used frequently in titles. It has a microbiology feel to it. If you do not have this font, some titles may appear odd, oversized and off-center. Find free downloads of Jokerman by Googling “download jokerman font microsoft”. Images used on this resource, and on the SPO website are, wherever possible, credited and linked to their source. Any words underlined and appearing in blue are links that can be clicked on for more information. PPT files must be viewed in slide show mode to use the hyperlinks directly. Several helpful links to fun and interactive learning tools are included throughout the PPT and on the Smart Links slide, near the end of each presentation. You must be in slide show mode to utilize hyperlinks and animations. This digital resource is licensed under Creative Commons Attribution-ShareAlike 3.0: http://creativecommons.org/licenses/by-sa/3.0/ Tami Port, MS Alicia Cepaitis, MS Creator of Science Prof Online Chief Creative Nerd Chief Executive Nerd Science Prof Online Science Prof Online Online Education Resources, LLC Online Education Resources, LLC [email protected] [email protected] From the Virtual Microbiology Classroom on ScienceProfOnline.com Image: Compound microscope objectives, T. Port  Virus Structure Image: Types of Viruses, National Institutes of Health From the Virtual Microbiology Classroom on ScienceProfOnline.com  Cellular Organisms vs Acellular Particles Eukaryotic Cell 1. Cellular microorganisms: Prokaryotes Domains: Archaea & Eubacteria Virus Eukaryotes Domain: Eukaryota Prokaryotic Cell 2. Acellular infectious particles: Viruses Eukaryotic So small can only be seen with an electron Nucleus microscope. Q: Are viruses the only type of acellular infectious particle? 1 ųm (1000 nm) From the Virtual Microbiology Classroom on ScienceProfOnline.com  How Do Viruses Differ From Living Organisms?  Viruses are not living organisms Living because they are incapable of Multicellular carrying out all life processes. Organism: Kayla  Viruses – are not made of cells – can not reproduce on their own – do not grow or undergo division Nonliving – do not transform energy Acellular Infectious – lack machinery for protein synthesis Agent: H1N1 Influenza Virus Images: Eukaryotic living organism named Kayla, T. Port; H1N1 Influenza Virus, Public Health Image Library (PHIL) #11702 From the Virtual Microbiology Classroom on ScienceProfOnline.com  What Are Viruses Made Of?  Nucleic acid, proteins, and sometimes, lipids. Need a quick chemistry review? Here are animated lessons and quizzes on Organic Macromolecules.  Nucleic acid surrounded by a protective protein coat, called a capsid.  An outer membranous layer, called an envelope, made of lipid and protein, surrounds the capsid in some viruses. Image: Virus Structure, Drs. Foster & Smith PetEducation.com From the Virtual Microbiology Classroom on ScienceProfOnline.com  What Are Viruses Made Of? Genetic Material of Viruses  Show more variety in nature of their genomes than do cells.  Like cells, viral genome is a nucleic acid.  Primary way scientists categorize and classify viruses.  Can be dsDNA, ssDNA, dsRNA, ssRNA.  May be linear and composed of several segments or single and circular.  Much smaller than genomes of cells. Q: What is similar about the genetic materials of cells and viruses. What is different? Images: DNA & RNA Diagrams, BiologyCorner From the Virtual Microbiology Classroom on ScienceProfOnline.com  What Are Viruses Made Of? The Viral Capsid  Protein coat provides protection for viral nucleic acid and means of attachment to host’s cells.  Composed of protein subunits called capsomeres.  Some capsids composed of single type of capsomere; others composed of multiple types. 1. ______________ 2. ______________ 3. ______________ Image: Tobacco mosaic virus, US Gov; Tobacco Mosaic Virus Structure, Y tambe, Wiki From the Virtual Microbiology Classroom on ScienceProfOnline.com  What Are Viruses Made Of? The Viral Envelope  Acquired from host cell during viral release; envelope is portion of membrane system of host.  Q: If the viral envelope is taken from an infected cell’s plasma membrane, what macromolecule is the viral envelope primarily made of?  Also contains proteins and virally-coded glycoproteins (spikes).  Envelope’s proteins and glycoproteins often play role in host recognition.  If a virus doesn’t have an envelope, it is Watch video: “Mechanism for Releasing considered to be a naked virus. Enveloped Viruses” from McGraw-Hill Image: Virus Structure, Drs. Foster & Smith PetEducation.com; ; Rubella virions budding, PHIL # 10220 From the Virtual Microbiology Classroom on ScienceProfOnline.com Helical Polyhedral Spherical Bacteriophage  REVIEW! Animated tutorial on Viruses NPR animated video “Flu Attack! How a Virus Invades Your Body” From the Virtual Microbiology Classroom on ScienceProfOnline.com Image: Virus Structure, Drs. Foster & Smith PetEducation.com  Confused? Here are links to more fun resources that further explain Microbiology:  Virus Structure Main Page on the Virtual Microbiology Classroom of Science Prof Online.  Watch video “Mechanism for Releasing Enveloped Virus” from McGraw-Hill.  Play Pandemic 2 a video game of strategy, where you try to become a successful pandemic microbe and infect the world. My 13-year old, pink- haired, daughter and I recommend this one to you.  “Quarantine” a scary movie about a new infectious disease.  Play Disease Defenders educational video game, Rice University.  “Catch My Disease” song by Ben Lee.  Giant Microbes, a company that sells adorable stuffed microbes. (You must be in PPT slideshow view to click on links.) From the Virtual Microbiology Classroom on ScienceProfOnline.com  Are microbes intimidating you? Do yourself a favor. Use the… Virtual Microbiology Classroom (VMC) ! The VMC is full of resources to help you succeed, including: practice test questions review questions study guides and learning objectives You can access the VMC by going to the Science Prof Online website www.ScienceProfOnline.com Images: Bacteriophage; Giant Microbes; Prokaryotic cell, Mariana Ruiz