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The Concept of Virus
The Concept of Virus

... poisonous fluid. A virus was something which could produce a disease. And in A.D. 50, Cornelius Aulus Celsus produced this remarkable sentence : ‘ Rabies is caused by a virus.’ The ideas of Celsus about viruses, considered in the light of our present knowledge, were probably rather primitive and the ...
The Concept of Virus
The Concept of Virus

... poisonous fluid. A virus was something which could produce a disease. And in A.D. 50, Cornelius Aulus Celsus produced this remarkable sentence : ‘ Rabies is caused by a virus.’ The ideas of Celsus about viruses, considered in the light of our present knowledge, were probably rather primitive and the ...
Viral evolution and the emergence of SARS
Viral evolution and the emergence of SARS

... hints at higher mutation rates; Sanz et al. 1999). On average, RNA polymerases produce almost one error in each replication cycle (Drake et al. 1998; Malpica et al. 2002), thus when populations of RNA viruses are large, they will produce a myriad of potentially adaptively useful genetic variation. S ...
my Powerpoint
my Powerpoint

... Living things that are usually too small to see with the naked eye.  They can be parasitic, saprophytic, mutualistic, beneficial, or harmful.  Some are photosynthetic.  Some have been genetically manipulated. ...
Biotechnology and Genetic Engineering
Biotechnology and Genetic Engineering

... See: http://micro.magnet.fsu.edu/cells/viruses/influenzavirus.html ...
In this essay you should have written it as two
In this essay you should have written it as two

... Enzymes from lysosomes digest bacteria Antigens are present on the surface of the bacteria/virus (specific) lymphocytes recognise (specific) antigen *specific required once Lymphocytes secrete / produce antibodies Antibodies attach to antigens and virus/bacteria are destroyed /made harmless maximum ...
Microbiology
Microbiology

... characteristics of life. ◘ They are not cells and do not use their own energy to grow or respond to their environment ◘ Although viruses can multiply, they do so differently than organisms. Viruses can multiply only inside a living host cell ◘ A virus acts like a parasite, as almost all viruses dest ...
Biology 20 Diversity of Life PowerPoint part 2.pps
Biology 20 Diversity of Life PowerPoint part 2.pps

... Viruses are infectious particles made only of a strand of DNA or RNA surrounded by protein coat. Viruses are small or very small (50-200 nm) and cannot be seen with a light microscope (you need an electron microscope). Some scientists consider viruses as complex chemicals ...
Viruses, Viroids, and Prions
Viruses, Viroids, and Prions

... • They have some properties of life but not others • For example, viruses can be killed, even crystallized like table salt • However, they can’t maintain a constant internal state (homeostasis). copyright cmassengale ...
Chapter 12 Section 12_1 DNA
Chapter 12 Section 12_1 DNA

... Molecular Cause of Transformation •  In 1944, a group of scientists led by Oswald Avery wanted to learn which ...
microbes overview
microbes overview

... carrageenan cell walls, substances used as thickening agents, e.g. Geledium, Chondrus – used as thickening agent in ice cream, toothpaste, salad, syrup, and snack foods • Phaeophyta (brown algae) contain xanthophylls, and oils. Cell walls composed of alginic acid, another thickening agent. Spore mot ...
Prokaryotes
Prokaryotes

... organisms or organic molecules for food ...
Ch. 19 Bacteria and Viruses
Ch. 19 Bacteria and Viruses

... II. Viruses (from Latin word for “poison”) A. What is a Virus? 1. Very small (need electron microscope to see) 2. Core of DNA or RNA surrounded by protein coat (capsid) with surface receptors (to recognize the cell they want to attack) a. Protein coat called capsid (proteins enable virus to enter h ...
7.6 Viruses
7.6 Viruses

... (b) The SARS-causing agent is a coronavirus like this one (colorized TEM), so named for the “corona” of glycoprotein spikes protruding from the envelope. ...
Viruses in Soil
Viruses in Soil

... Virus-like particles (VLPs) were isolated from fallow soils at SCRI using ...
Identification and Characterization of the Potato Leafroll Virus
Identification and Characterization of the Potato Leafroll Virus

... deletions were prepared using exonuclease III and mung bean nuclease (Henikoff, 1984). Subclones were sequenced by the dideoxynucleotide chain termination method of Sanger et al. (1977) using double-stranded plasmid DNA as template (Korneluk et al., 1985). Sequences were read using a Bio-Rad digitiz ...
Document
Document

... No countermeasures currently exist for the prevention or treatment of the severe sequelae of Filovirus (such as Ebola virus; EBOV) infection. To overcome this limitation in our biodefense preparedness, we have desig ned monoclonal antibodies (mAbs) which could be used in humans as immunoprotectants ...
What Are Bacteria?
What Are Bacteria?

... Tricky Viruses… And, depending on the type of virus, the viral particles may survive ‘intact’ for hours on a surface before degrading. If you touch that surface with your hands, and then touch your eyes, nose, or mouth, you may become infected! IF the virus has specificity to your cells! ...
Furtive foes: algal viruses as potential invaders
Furtive foes: algal viruses as potential invaders

... Algal virus invasions After introduction, successful viral invasions require access to a suitable host population because they cannot reproduce outside their host. The geographical range of potential host algae and the host range of the introduced virus are important for assessing the potential for ...
A picorna-like virus from the red imported fire ant, Solenopsis invicta
A picorna-like virus from the red imported fire ant, Solenopsis invicta

... SINV-1 contained sequence with similarity to RdRp (amino acids 1052 to 1327; Fig. 2C). According to Koonin and Dolja (1993), all positive-strand RNA viruses encode the RdRp and comparative analysis revealed that they possess eight common sequence motifs (Koonin, 1991). All eight of these motifs were ...
BIODIVERSITY-I: NON
BIODIVERSITY-I: NON

... [hypersensitive response (HR), systemic acquired resistance (SAR), phytoalexins, pathogenesis related (PR) proteins, plantibodies, phenolics, quinones, oxidative bursts]. Control of Plant Diseases: Principles & practices involved in the management of plant diseases by different methods, viz regulato ...
Biol 179 Study Guide Exam 1
Biol 179 Study Guide Exam 1

... from which they apparently were derived are the A) flagella and cilia B) microfilaments and microtubules C) mitochondria and chloroplasts D) rough ER and smooth ER E) plasma membrane and nuclear membrane 13. Current classification of prokaryotes is based on A) morphology of flagella B) sequencing of ...
Advanced Detection of Viruses and Protozoan Parasites in Water
Advanced Detection of Viruses and Protozoan Parasites in Water

... unit volume - a quantity of virus particles that may range from just a few or many more -at least some of which must be infectious. In addition, when a sample tests positive for viral infectivity using cell culture,the infectious agent is not necessarily known. The BGM cell line, routinely used for ...
53 morphology and general properties of viruses
53 morphology and general properties of viruses

... Haemagglutinin is a triangular spike and neuraminidase is mushroom-shaped. Envelope is sensitive to the action of lipid solvents. Envelopes confer chemical, antigenic and biological properties on viruses. The overall shape of the virus particle varies in different groups of viruses. Most animal viru ...
Chapter 35 Hepatitis viruses
Chapter 35 Hepatitis viruses

... Some copies of the RNA transcript are reverse transcribed into ssDNA The ssDNA is transcribed into dsDNA ...
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Plant virus



Plant viruses are viruses that affect plants. Like all other viruses, plant viruses are obligate intracellular parasites that do not have the molecular machinery to replicate without a host. Plant viruses are pathogenic to higher plants. While this article does not intend to list all plant viruses, it discusses some important viruses as well as their uses in plant molecular biology.
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