PPT-Virus-Cell Interaction Viruses often encode genes that induce, mimic, or shut down host

Author : judson111 | Published Date : 2024-10-04

Host has elaborate systems to shut down viral functions The outcome of infection may vary from essentially benign and undetectable to tolerated to lethal Physiologic

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Virus-Cell Interaction Viruses often encode genes that induce, mimic, or shut down host: Transcript

Host has elaborate systems to shut down viral functions The outcome of infection may vary from essentially benign and undetectable to tolerated to lethal Physiologic immune or inflammatory responses of the host. 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. Parasitic Worms. Kingdom . Animalia. : . eukaryotic. , no cell walls, heterotrophic nutrition, specialized tissues. A. Platyhelminthes. Flatworms. e.g. planarians . Platyhelminthes. Trematoda. = flukes . 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 . -It’s not a plant or an animal.. -It’s not a fungi, protist, or bacteria.. WHAT IS A VIRUS?. A virus is an . infectious. agent made up of . nucleic. acid (. DNA. or . RNA. ) wrapped in a . protein. © 2017 Pearson Education, Inc.. Introduction. A . virus . is an obligate, intracellular parasite . Viruses enter a . host. . cell. and use the host’. s biosynthetic machinery to reproduce and synthesize its proteins. -It’s not a plant or an animal.. -It’s not a fungi, protist, or bacteria.. WHAT IS A VIRUS?. A virus is an . infectious. agent made up of . nucleic. acid (. DNA. or . RNA. ) wrapped in a . protein. -It’s not a plant or an animal.. -It’s not a fungi, protist, or bacteria.. WHAT IS A VIRUS?. A virus is an . infectious. agent made up of . nucleic. acid (. DNA. or . RNA. ) wrapped in a . protein. 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. Viruses . are . non cellular. . particles . made . up of . genetic material . and . protein . that can . invade . living. . cells.. Definition. Edward Jenner (1798), introduced the term virus in microbiology.. Viruses are the most primitive microorganisms infecting man. . General properties. Obligate intracellular . Possess either DNA (deoxyribonucleic acid) or RNA (ribonucleic acid), but never both . Smaller than bacteria, can be passed through the bacterial filters. . Almaziny. Virology . Without a host cell, viruses cannot carry out . their . life-sustaining functions or reproduce. . Because : . They . cannot . synthesize proteins. , because they . Human Cancer. DNA Oncogenic Viruses. Papillomaviridae/ Polyomaviridae. . Human papilloma viruses. Cervical . carcinoma. Other . genital tract carcinoma. Anal,. . Vulval. /vaginal,. . Penile,. Esophageal.

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