Our selections for Fall 2005
... – Variants, caused by easy mutation of RNA – Immune system can’t recognize all differences, but some protection with age. – Multiplies in narrow temperature range, nose/sinus cooler than body temperature ...
... – Variants, caused by easy mutation of RNA – Immune system can’t recognize all differences, but some protection with age. – Multiplies in narrow temperature range, nose/sinus cooler than body temperature ...
notes chap. 24 virsuses - Fort Thomas Independent Schools
... Virulent – when a virus causes a disease Temperate – when a virus doesn’t cause disease right away (AIDS, cancer) Obligate intracellular parasite – (virus) must use a host for reproducing Nanometer (nm) – measurement for virus. 4000 can fit within a typed “o” ...
... Virulent – when a virus causes a disease Temperate – when a virus doesn’t cause disease right away (AIDS, cancer) Obligate intracellular parasite – (virus) must use a host for reproducing Nanometer (nm) – measurement for virus. 4000 can fit within a typed “o” ...
BACTERIA - Virus and Bacteria worksheet
... 1. ____________________ Do viruses belong to a kingdom? 2. _____________________________ A virus is made of ____ and ____. 3. ________________________ Viruses that contain RNA are called: 4. ________________________ Name of virus that attack bacteria? 5. ________________________ Made up of only ...
... 1. ____________________ Do viruses belong to a kingdom? 2. _____________________________ A virus is made of ____ and ____. 3. ________________________ Viruses that contain RNA are called: 4. ________________________ Name of virus that attack bacteria? 5. ________________________ Made up of only ...
Virues and Bacteria
... Bacteria Adaptations Endospore forms around bacteria during harsh conditions, cells grow and reproduce, can produce toxins; Botulism (food poisoning), anthrax (lives in soil). Bacteria can mutate quickly to environmental change and become more dangerous and resistant to ...
... Bacteria Adaptations Endospore forms around bacteria during harsh conditions, cells grow and reproduce, can produce toxins; Botulism (food poisoning), anthrax (lives in soil). Bacteria can mutate quickly to environmental change and become more dangerous and resistant to ...
Viruses
... 2. Viruses require a host organism, or living cell, to reproduce. 3. Viruses are parasites because they harm living cells. A virus has two basic parts: 1. a core of hereditary material 2. an outer coat of protein Viral Host Cell Infection 1. After a cell attaches to its host cell, it injects its her ...
... 2. Viruses require a host organism, or living cell, to reproduce. 3. Viruses are parasites because they harm living cells. A virus has two basic parts: 1. a core of hereditary material 2. an outer coat of protein Viral Host Cell Infection 1. After a cell attaches to its host cell, it injects its her ...
Chapter 5: Viruses and Monerans
... 1. How does a virus reproduce? How does this relate to how the virus causes disease? The virus injects hereditary material (nucleic acids) into a host cell, causing the host cell to ignore its normal functions and to produce more virus particles instead. The virus particles then leave the host cell ...
... 1. How does a virus reproduce? How does this relate to how the virus causes disease? The virus injects hereditary material (nucleic acids) into a host cell, causing the host cell to ignore its normal functions and to produce more virus particles instead. The virus particles then leave the host cell ...
1.3 Viruses are not alive but affect living things. Vocabulary Host cell
... 1.3 Viruses are not alive but affect living things. Vocabulary Host cell Viruses share some characteristics with living things ...
... 1.3 Viruses are not alive but affect living things. Vocabulary Host cell Viruses share some characteristics with living things ...
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 ...
... (cells) are closely related and why viruses are able to infect certain cells but not others Dec 23:09 PM ...
Essential Knowledge 3.C.3: Viral replication results in genetic
... Viruses reproduce in a host cell following one of two general replicative mechanisms. Compare and contrast the lytic cycle and lysogenic cycle of viral reproduction. ...
... Viruses reproduce in a host cell following one of two general replicative mechanisms. Compare and contrast the lytic cycle and lysogenic cycle of viral reproduction. ...
What is a virus
... - Capsid- a protein coat that surrounds the genetic material Why are viruses considered nonliving? - They are not composed of cells. - They cannot reproduce independently (require a host). Can cause disease - Germ theory of infectious disease- disease can be caused by microorganisms (bacteria, virus ...
... - Capsid- a protein coat that surrounds the genetic material Why are viruses considered nonliving? - They are not composed of cells. - They cannot reproduce independently (require a host). Can cause disease - Germ theory of infectious disease- disease can be caused by microorganisms (bacteria, virus ...
Viruses - saddlespace.org
... • Antiviral drugs are available to treat only a few viral diseases. Why is this so??? – Because the drug is likely to be toxic to the host as well as the virus. ...
... • Antiviral drugs are available to treat only a few viral diseases. Why is this so??? – Because the drug is likely to be toxic to the host as well as the virus. ...
Viruses
... Only 3 characteristics of life: reproduction, evolution, and genetic code (DNA/RNA) Can only reproduce inside a host cell! Process or reproduction = lytic cycle ...
... Only 3 characteristics of life: reproduction, evolution, and genetic code (DNA/RNA) Can only reproduce inside a host cell! Process or reproduction = lytic cycle ...
Viruses - Mr. Enns
... Viruses are tiny, non-living particles that can reproduce ONLY inside a host cell. Viruses seem to be living because they can infect us and spread… ….but a virus has no nucleus and no organelles So its not classed as living! ...
... Viruses are tiny, non-living particles that can reproduce ONLY inside a host cell. Viruses seem to be living because they can infect us and spread… ….but a virus has no nucleus and no organelles So its not classed as living! ...
Viruses - Elgin Local Schools
... Viruses: Nucleic Acids: -DNA or RNA -single strand or double strand Capsid: proteins coat that enables infection of cell ...
... Viruses: Nucleic Acids: -DNA or RNA -single strand or double strand Capsid: proteins coat that enables infection of cell ...
Viruses - Elgin Local Schools
... Viruses: Nucleic Acids: -DNA or RNA -single strand or double strand Capsid: proteins coat that enables infection of cell ...
... Viruses: Nucleic Acids: -DNA or RNA -single strand or double strand Capsid: proteins coat that enables infection of cell ...
Name - TeacherPage.com
... Viruses and Disease (pages 486-487) 9. What are some human diseases that viruses cause? 10. What is a vaccine? 11. How does a vaccine prevent a viral disease when injected into the body? 12. What are cancer causing viruses known as? 13. What are retroviruses and what happens when they infect the ce ...
... Viruses and Disease (pages 486-487) 9. What are some human diseases that viruses cause? 10. What is a vaccine? 11. How does a vaccine prevent a viral disease when injected into the body? 12. What are cancer causing viruses known as? 13. What are retroviruses and what happens when they infect the ce ...
20.1 viruses - OG
... 5. Once inside the viral genes are expressed. This may lead to the cells destruction. ...
... 5. Once inside the viral genes are expressed. This may lead to the cells destruction. ...
Virus
A virus is a small infectious agent that replicates only inside the living cells of other organisms. Viruses can infect all types of life forms, from animals and plants to microorganisms, including bacteria and archaea.Since Dmitri Ivanovsky's 1892 article describing a non-bacterial pathogen infecting tobacco plants, and the discovery of the tobacco mosaic virus by Martinus Beijerinck in 1898, about 5,000 virus species have been described in detail, although there are millions of different types. Viruses are found in almost every ecosystem on Earth and are the most abundant type of biological entity. The study of viruses is known as virology, a sub-speciality of microbiology.While not inside an infected cell or in the process of infecting a cell, viruses exist in the form of independent particles. These viral particles, also known as virions, consist of two or three parts: (i) the genetic material made from either DNA or RNA, long molecules that carry genetic information; (ii) a protein coat, called the capsid, which surrounds and protects the genetic material; and in some cases (iii) an envelope of lipids that surrounds the protein coat when they are outside a cell. The shapes of these virus particles range from simple helical and icosahedral forms for some virus species to more complex structures for others. Most virus species have virions that are too small to be seen with an optical microscope. The average virion is about one one-hundredth the size of the average bacterium.The origins of viruses in the evolutionary history of life are unclear: some may have evolved from plasmids—pieces of DNA that can move between cells—while others may have evolved from bacteria. In evolution, viruses are an important means of horizontal gene transfer, which increases genetic diversity. Viruses are considered by some to be a life form, because they carry genetic material, reproduce, and evolve through natural selection. However they lack key characteristics (such as cell structure) that are generally considered necessary to count as life. Because they possess some but not all such qualities, viruses have been described as ""organisms at the edge of life"".Viruses spread in many ways; viruses in plants are often transmitted from plant to plant by insects that feed on plant sap, such as aphids; viruses in animals can be carried by blood-sucking insects. These disease-bearing organisms are known as vectors. Influenza viruses are spread by coughing and sneezing. Norovirus and rotavirus, common causes of viral gastroenteritis, are transmitted by the faecal–oral route and are passed from person to person by contact, entering the body in food or water. HIV is one of several viruses transmitted through sexual contact and by exposure to infected blood. The range of host cells that a virus can infect is called its ""host range"". This can be narrow, meaning a virus is capable of infecting few species, or broad, meaning it is capable of infecting many.Viral infections in animals provoke an immune response that usually eliminates the infecting virus. Immune responses can also be produced by vaccines, which confer an artificially acquired immunity to the specific viral infection. However, some viruses including those that cause AIDS and viral hepatitis evade these immune responses and result in chronic infections. Antibiotics have no effect on viruses, but several antiviral drugs have been developed.