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Viruses
Viruses

... (Link) HIV Animation - how virus infects cells ...
Viruses + Bacteria
Viruses + Bacteria

... • Before a virus can replicate it has to attach to a host cell. • Must recognize and attach to a receptor site on the plasma membrane of the host. • Each virus has a specifically shaped attachment protein. • Most viruses have only a few possible hosts. ...
Bacteria and Viruses
Bacteria and Viruses

... • Spirilli (spiral-shaped) ...
virus
virus

... Either single-stranded or double-stranded DNA or RNA - linear, closed circle, or able to assume either shape. Reproduce only within living cells Virion All viruses have a nucleocapsid composed of a nucleic acid surrounded by a protein capsid that may be icosahedral, helical, or complex in structure. ...
Viral Structure and Life Cycles : Notes - Mr. Lesiuk
Viral Structure and Life Cycles : Notes - Mr. Lesiuk

... ** Some biologists describe viruses as being non-living infectious particles C) Viral Life Cycles - Two main types of Life Cycles (Viral Replication) for viruses: ...
Viruses: Bacterial and Animal
Viruses: Bacterial and Animal

... viral-induced tumors • Cancer is result of integration of viral genes into the host chromosome • Transforming genes are called oncogenes • Examples: papillomavirus, herpesvirus ...
By route of transmission-1 - Arkansas State University
By route of transmission-1 - Arkansas State University

... • Virus elicits change in behavior of host – Virus multiplies in salivary glands and brain – Animals become agitated and bite, spread virus ...
Cultivation of virus
Cultivation of virus

... 1. Biological System a) Natural host b) Experimental animals c) Transgenic animals ...
LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

... FIRST SEMESTER – APRIL 2014 BT 1827 - MICROBIOLOGY Date : 04/04/2014 Time : 09:00-12:00 ...
Biological Properties of Tomato apex necrosis virus (ToANV)
Biological Properties of Tomato apex necrosis virus (ToANV)

... viroids and other subviral agents). Not all genera are within assigned families at this time, and some new genera and families are not shown at right. According to Hull, (page 87) he says there are 977 species of plant viruses as of 2002, more are being identified all the time. Within the genus Poty ...
Intro to Virology
Intro to Virology

... tobacco mosaic disease would pass through filters designed to remove bacteria ...
#23 Viruses made by: marah marahleh corrected by: Amer Al
#23 Viruses made by: marah marahleh corrected by: Amer Al

... Ex : S.aureus cause food poisoning if I have a case of food poisoning in salt and another Case in aqaba , in epidemiological studies I need to know if the same strain of the bacteria caused the food poisoningin both cases . so we take the bacteria samples that have collected and infect it with a vir ...
Viruses: Bacterial and Animal
Viruses: Bacterial and Animal

... • dsDNA viruses are most common to cause viral-induced tumors • Cancer is result of integration of viral genes into the host chromosome • Transforming genes are called oncogenes • Examples: papillomavirus, herpesvirus ...
Virus/Bacteria Review Questions
Virus/Bacteria Review Questions

... 4. What is the structure of a typical virus? _________________________________________ 5. A virus’s protein coat is called a (an) ________________. 6. How does a typical virus get inside a cell? _______________________________________ ____________________________________ 7. Why are most viruses hig ...
Prokaryote vs. Eukaryote
Prokaryote vs. Eukaryote

... Debate over whether viruses are “alive”  Arguments that they are not-living • Cannot live independently (require a host or remain dormant) (parasites of living cells!!) • Not Cellular  Arguments that they are living • Contain genetic material (RNA and DNA) • Reproduce ...
Viruses: viruses are not considered to be living organisms do not
Viruses: viruses are not considered to be living organisms do not

... (cells) are closely related and why viruses are  able to infect certain cells but not others Dec 2­3:09 PM ...
19-3 Viruses
19-3 Viruses

... into the cell and is replicated along with the host cell’s DNA.  Do NOT lyse the host cell away.  Viral DNA becomes part of the hosts DNA…(prophage.)  The prophage will remain this way for a varied amount of time.  Some “factors” will activate the prophage, and the cell will start making viruses ...
Viruses
Viruses

... 1. After a cell attaches to its host cell, it injects its hereditary material into that cell. 2. After injection, the protein coat is left behind. 3. The injected genetic material begins to use the supplies in the host cell to manufacture new viruses. 4. After a period of time, the host cell bursts ...
Virus Webquest - Northwest ISD Moodle
Virus Webquest - Northwest ISD Moodle

... they ________________, animals, plants, or bacteria. 5. Viruses are further classified into families and genera based on three structural considerations: 1) the type and size of their ___________________________, 2) the size and shape of the __________________________, 3) whether they have a lipid _ ...
Viruses - hudson.k12.oh.us
Viruses - hudson.k12.oh.us

... • Shows receptors and how anti-viral drugs can be effective HIV budding from a lymphocyte ...
Viruses - Hudson City School District
Viruses - Hudson City School District

... • Shows receptors and how anti-viral drugs can be effective HIV budding from a lymphocyte ...
Viruses
Viruses

...  Attaches only to T-cells (WBC)  Translates RNA into DNA, integration into cellular DNA called provirus  Provirus DNA is transcribed to make new HIV viruses that leave cell  Provirus never leaves cell ...
Notes 3 Microbes - harnettcountyhighschools
Notes 3 Microbes - harnettcountyhighschools

... Every ________ that originates from an infected host cell has a __________________________ The lysogenic phase can continue for many _____________ At any time the provirus can activate and enter a ______________ cycle 3) RNA Viruses = ____________________ viruses. Enzyme needed to convert RNA to DNA ...
Giant viruses!
Giant viruses!

... agents invisible to the light microscope and capable of passing through "sterilizing" filters. In addition to their extremely small size, most viruses studied over the years also exhibited minimal genomes and gene contents, almost entirely relying on cell-encoded functions to multiply, as expected f ...
LN #12 Viruses
LN #12 Viruses

... • Viruses are a lot smaller than bacteria or animal cells. • Unlike cells that are living, viruses are nonliving. • They are unable to grow and reproduce on their own and therefore must infect cells to do so. ...
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History of virology



The history of virology – the scientific study of viruses and the infections they cause – began in the closing years of the 19th century. Although Louis Pasteur and Edward Jenner developed the first vaccines to protect against viral infections, they did not know that viruses existed. The first evidence of the existence of viruses came from experiments with filters that had pores small enough to retain bacteria. In 1892, Dmitry Ivanovsky used one of these filters to show that sap from a diseased tobacco plant remained infectious to healthy tobacco plants despite having been filtered. Martinus Beijerinck called the filtered, infectious substance a ""virus"" and this discovery is considered to be the beginning of virology. By the 20th century many viruses were discovered.
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