COMMENTS

  1. Chapter 17 VIruses

    Concept 17.3: Viruses, viroids, and prions are formidable pathogens in animals and plants. Diseases caused by viral infections affect humans, agricultural crops, and livestock worldwide. Smaller, less complex entities called viroids and prions also cause disease in plants and animals, respectively.

  2. PDF Viruses

    How Viruses Multiply. (Active Viruses) Virus attaches to the host cell Virus injects genetic material Viral DNA or RNA control production of viral protein and DNA or RNA Protein and genetic material are assembled Host cell bursts and virus is released. Active Viruses. Active Virus.

  3. Coronavirus Biology

    In this presentation, you will learn general principles of viral biology, with specific exemplars from the SARS-CoV-2 novel coronavirus. ... Regardless of the type of virus, they all have the same "mission" … to hijack cellular machinery to force the cell to: Make more virus nucleic acid (DNA or RNA) (replication).

  4. Introduction to Viruses That Infect Humans: The DNA Viruses

    24.1 Viruses in Human Infections and Diseases •DNA or RNA molecules are surrounded by a protein coat; obligate parasites that enter a cell, instruct its genetic and molecular machinery to produce and release new viruses •All DNA viruses are double-stranded except for parvoviruses, which have ssDNA •All RNA viruses are single-stranded except

  5. STRUCTURE, CLASSIFICATION AND PHYSIOLOGY OF VIRUSES

    4 CLASSIFICATION OF VIRUSES. (1) Nucleic acid type: RNA or DNA; single-stranded or double-stranded; strategy of replication. (2) Size and morphology, including type of symmetry, number of capsomeres, and presence of membranes. (3) Presence of specific enzymes, particularly RNA and DNA polymerases, and neuraminidase (4) Susceptibility to ...

  6. Virus Structure, Classification, and Cycles of Infections

    6 2 universal virus structures. 1. Capsid- Protein coat that encases the genetic material of a virus Hard outer layer which protects the genetic material and binds to host cell 2. Genetic Material- DNA or RNA Enters cell and reproduces to make new viruses Kill host cells by spreading genetic material MR.

  7. PDF PowerPoint Presentation

    To initiate infection, the virus must be able to bind to target cell. Binding occurs between: - Ligands on the virus surface. (viral attachment proteins) - Receptors on the plasma membrane of cell. Although there is a degree of specificity, quite different viruses may utilize the same receptor and, conversely, viruses in the same family or ...

  8. PDF Introduction to Viruses

    • The type of disease -Murine leukemia virus • Geographic locations -Sendai virus, Coxsackie virus • Their discovers -Epstein-Barr virus • How they were originally thought to be contracted -Dengue virus ("evil spirit"), Influenza virus (the "influence" of bad air) • Combinations of the above -Rous Sarcoma virus

  9. Introduction to Viruses

    8. Introduction to Viruses. Viruses are typically described as obligate intracellular parasites, acellular infectious agents that require the presence of a host cell in order to multiply. Viruses that have been found to infect all types of cells - humans, animals, plants, bacteria, yeast, archaea, protozoa…some scientists even claim they ...

  10. Virus

    Virus, infectious agent of small size and simple composition that can multiply only in living cells of animals, plants, or bacteria. Viruses possess unique infective properties and thus often cause disease in host organisms. Learn about the history, types, and features of viruses.

  11. 6.1 Viruses

    Viruses can infect every type of host cell, including those of plants, animals, fungi, protists, bacteria, and archaea. Most viruses will only be able to infect the cells of one or a few species of organism. This is called the host range. However, having a wide host range is not common and viruses will typically only infect specific hosts and ...

  12. PPT

    An Image/Link below is provided (as is) to download presentation Download Policy: ... • Based on: - the disease they cause poliovirus, rabies virus - the type of disease murine leukemia virus - geographic locations Sendai virus, Coxsackie virus - their discovers Epstein-Barr virus - how they were originally thought to be contracted dengue ...

  13. Structure and Classification of Viruses

    Viruses are small obligate intracellular parasites, which by definition contain either a RNA or DNA genome surrounded by a protective, virus-coded protein coat. Viruses may be viewed as mobile genetic elements, most probably of cellular origin and characterized by a long co-evolution of virus and host. For propagation viruses depend on specialized host cells supplying the complex metabolic and ...

  14. PDF Virus PowerPoint

    Viruses have either DNA or RNA but NOT both. Viruses with RNA that transcribe into DNA are HIV Infected Cell A flea is a parasite to a dog and is harmful to the dog. Viruses are parasites—an organism that depends entirely upon another living organism (a host) for its existence in such a way that it harms that organism. (This is the reason why HIV is so incurable.)

  15. Free templates about virus for Google Slides and PowerPoint

    Share the most recent scientific researches, medical advances, and treatments of viruses that have marked the history of humanity, such as the Spanish flu or COVID-19. Gather all the necessary information in one of the presentations designed for Google Slides and PowerPoint, and help the world know how they can prevent the spread of these viruses.