Viruses
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Viruses are microscopic particles that infect and often destroy cells. They contain proteins and nucleic acids but do not grow, metabolize, or respond to stimuli like living things. Viruses reproduce by forcing the cells they infect to produce more viruses instead of healthy new cells. Viruses come in different shapes like spheres, cylinders, and crystals, and contain either RNA or DNA as their nucleic acid.
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![[object Object],Viruses are tiny, they are smaller than the smallest bacteria . Red blood cell 7500 nm](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
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viruses
The document is about viruses and their properties. It discusses that viruses can infect bacteria, plants, and animals, and some viruses cause diseases like colds, flu, and cancer in humans. Viruses are either DNA or RNA protected by a protein coat, and they force host cells to make copies of the virus until the cell explodes and releases new viruses. Viruses range in size from 20-250 nanometers and replicate by entering a host cell, releasing their genetic material, forcing the cell to make more virus copies, and then releasing new viruses to infect other cells.
Bryophytes
Viruses are particles that can only reproduce by infecting living cells and contain nucleic acid, protein, and sometimes lipids. They do not have fossils but may have impacted life's history. Viruses use capsids made of protein to enter host cells. Some viruses infect bacteria while others contain RNA as their genetic material or are made solely of protein. Viruses can cause lytic infections that burst cells or lysogenic infections where viral DNA embeds in the host. Many human diseases are caused by viruses like polio, measles, AIDS, influenza, and rabies.
Viruses ppt
Viruses are microscopic particles that can only reproduce inside living cells. They contain genetic material inside a protein coat and come in various shapes. Viruses use the machinery of host cells to produce more viruses rather than healthy new cells. They are classified based on shape, genetic material, and the type of disease or organism they affect. Viruses can either enter a lytic cycle where they immediately destroy the host cell to release new viruses, or a lysogenic cycle where their genes remain inactive until triggering further infection. Antibiotics do not work on viruses, so prevention through vaccination is important.
viruses
Viruses are non-living particles that can only reproduce inside host cells. They are smaller than bacteria and contain genetic material (DNA or RNA) surrounded by a protein coat called a capsid. Viruses infect specific hosts like bacteria, plants, and animals, and can cause diseases in these hosts by hijacking the host cell's machinery to produce more viruses. While some viruses are harmful, not all viruses cause disease. Viruses come in different shapes and sizes and use host cells to replicate their genetic material and protein coats to produce new virus particles.
Viral structure & properaties
Viruses are defined as nucleoprotein complexes that infect host cells and use their metabolic processes to replicate. They are the smallest known infectious agents and are metabolically inert outside of host cells, requiring entry into a host cell to replicate. Viruses come in different structures with either DNA or RNA genomes and may have capsids alone or capsids surrounded by envelopes. They infect bacteria, plants, animals, and humans by invading cells and forcing them to produce new virus copies until the cell lyses.
Virus
Virology is the study of viruses – submicroscopic, parasitic particles of genetic material contained in a protein coat and virus-like agents. It focuses on the following aspects of viruses: their structure, classification and evolution, their ways to infect and exploit host cells for reproduction, their interaction with host organism physiology and immunity, the diseases they cause, the techniques to isolate and culture them, and their use in research and therapy. Virology is considered to be a subfield of microbiology or of medicine.
Detection of banana viruses in weed plants through dac elisa
it contain the detail of banana viruses in weed plants using DAC-ELISA. This is more use full for your study and project work
Ch9 review q
1. Viruses are much smaller than bacteria, lack cellular structures, and can only replicate inside living cells. They contain either DNA or RNA surrounded by a protein coat and sometimes an envelope.
2. Viruses are classified based on their nucleic acid, protein coat, and genome organization/sequence. Examples include the herpesvirus family and human herpesvirus 2 genus.
3. Viral growth is measured in plaque-forming units and viruses can be cultured using cell cultures or embryonic eggs.
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viruses
The document is about viruses and their properties. It discusses that viruses can infect bacteria, plants, and animals, and some viruses cause diseases like colds, flu, and cancer in humans. Viruses are either DNA or RNA protected by a protein coat, and they force host cells to make copies of the virus until the cell explodes and releases new viruses. Viruses range in size from 20-250 nanometers and replicate by entering a host cell, releasing their genetic material, forcing the cell to make more virus copies, and then releasing new viruses to infect other cells.
Bryophytes
Viruses are particles that can only reproduce by infecting living cells and contain nucleic acid, protein, and sometimes lipids. They do not have fossils but may have impacted life's history. Viruses use capsids made of protein to enter host cells. Some viruses infect bacteria while others contain RNA as their genetic material or are made solely of protein. Viruses can cause lytic infections that burst cells or lysogenic infections where viral DNA embeds in the host. Many human diseases are caused by viruses like polio, measles, AIDS, influenza, and rabies.
Viruses ppt
Viruses are microscopic particles that can only reproduce inside living cells. They contain genetic material inside a protein coat and come in various shapes. Viruses use the machinery of host cells to produce more viruses rather than healthy new cells. They are classified based on shape, genetic material, and the type of disease or organism they affect. Viruses can either enter a lytic cycle where they immediately destroy the host cell to release new viruses, or a lysogenic cycle where their genes remain inactive until triggering further infection. Antibiotics do not work on viruses, so prevention through vaccination is important.
viruses
Viruses are non-living particles that can only reproduce inside host cells. They are smaller than bacteria and contain genetic material (DNA or RNA) surrounded by a protein coat called a capsid. Viruses infect specific hosts like bacteria, plants, and animals, and can cause diseases in these hosts by hijacking the host cell's machinery to produce more viruses. While some viruses are harmful, not all viruses cause disease. Viruses come in different shapes and sizes and use host cells to replicate their genetic material and protein coats to produce new virus particles.
Viral structure & properaties
Viruses are defined as nucleoprotein complexes that infect host cells and use their metabolic processes to replicate. They are the smallest known infectious agents and are metabolically inert outside of host cells, requiring entry into a host cell to replicate. Viruses come in different structures with either DNA or RNA genomes and may have capsids alone or capsids surrounded by envelopes. They infect bacteria, plants, animals, and humans by invading cells and forcing them to produce new virus copies until the cell lyses.
Virus
Virology is the study of viruses – submicroscopic, parasitic particles of genetic material contained in a protein coat and virus-like agents. It focuses on the following aspects of viruses: their structure, classification and evolution, their ways to infect and exploit host cells for reproduction, their interaction with host organism physiology and immunity, the diseases they cause, the techniques to isolate and culture them, and their use in research and therapy. Virology is considered to be a subfield of microbiology or of medicine.
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1. Viruses are much smaller than bacteria, lack cellular structures, and can only replicate inside living cells. They contain either DNA or RNA surrounded by a protein coat and sometimes an envelope.
2. Viruses are classified based on their nucleic acid, protein coat, and genome organization/sequence. Examples include the herpesvirus family and human herpesvirus 2 genus.
3. Viral growth is measured in plaque-forming units and viruses can be cultured using cell cultures or embryonic eggs.
Viruses
Viruses come in a variety of shapes and sizes and are composed of either RNA or DNA surrounded by a protein capsid. They can only replicate by infecting living host cells. Viruses enter cells through different methods like endocytosis, fusing with membranes, or piercing the cell. Viral infection can result in lysis of the host cell or lysogeny where the viral DNA remains dormant within the host DNA. Common viral diseases are spread through routes like respiratory droplets, contaminated objects or fluids, mosquitoes, and food. Prevention methods include vaccines, good hygiene, and disinfectants.
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Viruses can replicate through two cycles: the lytic cycle or the lysogenic cycle. The lytic cycle involves 5 phases - adsorption, penetration, replication, assembling, and release of new virus particles that go on to infect other cells. The lysogenic cycle involves the virus inserting its genetic material into the host cell DNA without immediately destroying the cell. The genetic material is then replicated alongside future cell divisions.
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7. Cellular Response In Defence In Animals And Plants
The document discusses cellular defense mechanisms in animals and plants. In animals, phagocytosis and antibody production help defend against viruses and other pathogens. Phagocytes engulf and destroy invading microbes, while antibodies target specific antigens. Immunological memory allows faster responses upon second exposures. In plants, production of toxic compounds and compartmentalization of infections help limit damage from invaders.
Virus ( bhsa inggris biologi ),, nor azizah
The document discusses viruses, describing them as microscopic parasites that infect organisms and contain genetic material like DNA or RNA. It explains that viruses have characteristics of both living and nonliving things, and notes the structures of viruses can consist of a head, neck, foot and tail. Finally, it provides examples of the roles viruses play in human life, both beneficial by producing vaccines and harmful by causing diseases like influenza.
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Final Presentation For Ci776 For Slideshare
Viruses and bacteria are microscopic organisms. Viruses come in two types - active and hidden. Active viruses can make you sick immediately while hidden viruses can survive dormant for hundreds of years. Viruses are smaller than bacteria and contain protein coats and DNA. Antony van Leeuwenhoek first discovered bacteria in the 1600s using microscopes. Bacteria can reproduce through binary fission or conjugation and take different shapes like spiral, rodlike or spherical. They can be helpful in food production or harmful if not treated by processes like pasteurization.
Ezkare Presentation : Dark Color Version
Education Material about Virus Presentation Template
If you want to buy this presentation template, please visit http://madlis.com
Good design gets out of the way of the content you are sharing. It helps your audience focus on the content itself instead of the design.
But, it's no secret that most people dislike giving presentations. The dread of public speaking consistently ranks among the greatest fears in public surveys.
This presentation slides can help you reduce the anxiety involved with giving a presentation. Well-designed slides not only build your own confidence, they make your key points clearer to the audience.
Ezkare Presentation : Light Color Version
Education Material about Virus Presentation Template
If you want to buy this presentation template, please visit http://madlis.com
Good design gets out of the way of the content you are sharing. It helps your audience focus on the content itself instead of the design.
But, it's no secret that most people dislike giving presentations. The dread of public speaking consistently ranks among the greatest fears in public surveys.
This presentation slides can help you reduce the anxiety involved with giving a presentation. Well-designed slides not only build your own confidence, they make your key points clearer to the audience.
virus powerpoint
Viruses are non-living particles that can only reproduce inside host cells. They are smaller than bacteria and contain genetic material surrounded by a protein coat. Viruses come in various shapes and sizes and cause diseases like influenza, measles, HIV/AIDS, and some cancers. Edward Jenner developed the first vaccine for smallpox using a related cowpox virus. Viruses are identified based on their morphology, genetic material, presence of an envelope, capsid shape, host cell, and more. They exist in nature as parasites and depend on host cells for reproduction through lysogenic or lytic cycles.
Hoofdstuk 19 2008 deel 2
This document discusses several aspects of viruses including their life cycles, how they spread, and their classification. It notes that HIV targets lymphocytes and macrophages and causes irreversible damage to the immune system. It also describes how plant viruses can spread horizontally from an external source or vertically through inheritance, and how they move between plant cells via plasmodesmata. Additionally, it defines viroids as naked circular RNA that disrupts plant metabolism and prions as infectious proteins.
Astrovirus
Astroviruses are non-enveloped viruses with positive-sense RNA genomes that cause gastroenteritis. They have an icosahedral capsid containing three major proteins and a genome organized into three open reading frames. ORF1 encodes nonstructural proteins involved in replication, ORF2 encodes the structural capsid polyprotein which is processed by cellular proteases. Infection involves binding to an unknown receptor, translation of viral proteins, processing of polyproteins, replication through a negative-sense intermediate, and assembly of new virions which are released from the cell.
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The document summarizes key information about viruses, including their discovery, structure, and characteristics. It provides details on different virus shapes (helical, polyhedral, complex) and structures. Specific viruses discussed include tobacco mosaic virus (TMV), adenovirus, bacteriophage T4, and their components. Viruses are described as ultramicroscopic particles that can only be seen with electron microscopes and vary greatly in size and shape. They contain nucleic acids and infect host cells to reproduce.
Virus
A virus is an infectious agent made up of nucleic acid wrapped in a protein coat called a capsid. Viruses have no cell structure of their own and rely on hijacking the cellular machinery of host cells to replicate. They are parasites that infect organisms like bacteria and humans and can cause diseases like HIV. Viruses either contain DNA or RNA but not both and reproduce by injecting their nucleic acid into host cells to replicate their components and assemble new viral particles.
Viruses
Viruses are non-living particles that contain nucleic acid surrounded by a protein coat. They can only replicate inside a host cell by inserting their DNA or RNA and using the host's cellular machinery. There are two main viral replication cycles: lytic, where new viruses are assembled and burst out destroying the host cell, and lysogenic, where the viral DNA integrates into the host genome and replicates with the cell until proteins trigger new virus production. Viruses damage cells by inhibiting protein synthesis, lysing cell membranes, and producing toxic proteins. A lytic virus is most likely to cause a disease like influenza that has short incubation and produces symptoms quickly as it destroys host cells.
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Viruses
Viruses are non-cellular, obligate intracellular parasites that consist of nucleic acid (DNA or RNA) surrounded by a protein coat. They can only replicate inside living host cells by using the host's cellular machinery. Viruses come in a variety of shapes and sizes but are generally quite small, ranging from 18-400 nm. They are classified based on their nucleic acid composition and structure. Viruses infect both plants and animals and include important human pathogens.
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Viruses are the smallest infectious agents and can infect all forms of life. They are obligate intracellular parasites that contain either RNA or DNA. Many important human viruses are described including influenza, measles, hepatitis B, and HIV. Viruses have a protein coat that protects their genetic material and use host cells to replicate. Host responses to viral infection include innate immune defenses and adaptive immune responses like antibodies and T cells. Acute viral infections are generally mild and short-lived while some viruses can establish persistent infections by becoming latent or causing chronic or latent infections.
Virus.pptx
This document discusses viruses and provides information about their structure and life cycle. It defines viruses as non-cellular infectious particles composed of genetic material surrounded by a protein coat. Viruses are described as non-living because they contain no organelles and must use a host cell's machinery to replicate, but are also considered living because they can reproduce and mutate. The document outlines the differences between DNA and RNA viruses and describes viral capsids and envelopes. It explains the lytic and lysogenic replication cycles viruses use to infect host cells and how they are specific to certain kingdoms but not always specific species.
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Viruses
Viruses come in a variety of shapes and sizes and are composed of either RNA or DNA surrounded by a protein capsid. They can only replicate by infecting living host cells. Viruses enter cells through different methods like endocytosis, fusing with membranes, or piercing the cell. Viral infection can result in lysis of the host cell or lysogeny where the viral DNA remains dormant within the host DNA. Common viral diseases are spread through routes like respiratory droplets, contaminated objects or fluids, mosquitoes, and food. Prevention methods include vaccines, good hygiene, and disinfectants.
Virus
Viruses can replicate through two cycles: the lytic cycle or the lysogenic cycle. The lytic cycle involves 5 phases - adsorption, penetration, replication, assembling, and release of new virus particles that go on to infect other cells. The lysogenic cycle involves the virus inserting its genetic material into the host cell DNA without immediately destroying the cell. The genetic material is then replicated alongside future cell divisions.
Virus
Beijerinck (1897) coined the Latin name “virus” meaning poison
He studied filtered plant juices & found they caused healthy plants to become sick
Virus
HIV is a virus that contains nucleic acid inside a capsid surrounded by a viral envelope. It is extremely small, unable to move on its own, and relies on infecting cells to reproduce. The viral infection process involves the virus entering a cell, using the cell's machinery to produce new viral components, then releasing new viruses to infect other cells.
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The document discusses cellular defense mechanisms in animals and plants. In animals, phagocytosis and antibody production help defend against viruses and other pathogens. Phagocytes engulf and destroy invading microbes, while antibodies target specific antigens. Immunological memory allows faster responses upon second exposures. In plants, production of toxic compounds and compartmentalization of infections help limit damage from invaders.
Virus ( bhsa inggris biologi ),, nor azizah
The document discusses viruses, describing them as microscopic parasites that infect organisms and contain genetic material like DNA or RNA. It explains that viruses have characteristics of both living and nonliving things, and notes the structures of viruses can consist of a head, neck, foot and tail. Finally, it provides examples of the roles viruses play in human life, both beneficial by producing vaccines and harmful by causing diseases like influenza.
Hendra inside2
The document discusses the high level of biosecurity at a secretive lab that studies deadly viruses. Scientists at the lab work daily with a virus that could potentially kill millions. The lab has strict safety protocols, including multiple security checkpoints, airlock doors to seal sections, and requirements that nothing leaves and no one exits without sterilization and decontamination. The article notes that the team researching the viruses is nicknamed the "Bat Pack" and works toward developing vaccines and early warning systems for viruses like Hendra virus that can infect horses and humans.
Final Presentation For Ci776 For Slideshare
Viruses and bacteria are microscopic organisms. Viruses come in two types - active and hidden. Active viruses can make you sick immediately while hidden viruses can survive dormant for hundreds of years. Viruses are smaller than bacteria and contain protein coats and DNA. Antony van Leeuwenhoek first discovered bacteria in the 1600s using microscopes. Bacteria can reproduce through binary fission or conjugation and take different shapes like spiral, rodlike or spherical. They can be helpful in food production or harmful if not treated by processes like pasteurization.
Ezkare Presentation : Dark Color Version
Education Material about Virus Presentation Template
If you want to buy this presentation template, please visit http://madlis.com
Good design gets out of the way of the content you are sharing. It helps your audience focus on the content itself instead of the design.
But, it's no secret that most people dislike giving presentations. The dread of public speaking consistently ranks among the greatest fears in public surveys.
This presentation slides can help you reduce the anxiety involved with giving a presentation. Well-designed slides not only build your own confidence, they make your key points clearer to the audience.
Ezkare Presentation : Light Color Version
Education Material about Virus Presentation Template
If you want to buy this presentation template, please visit http://madlis.com
Good design gets out of the way of the content you are sharing. It helps your audience focus on the content itself instead of the design.
But, it's no secret that most people dislike giving presentations. The dread of public speaking consistently ranks among the greatest fears in public surveys.
This presentation slides can help you reduce the anxiety involved with giving a presentation. Well-designed slides not only build your own confidence, they make your key points clearer to the audience.
virus powerpoint
Viruses are non-living particles that can only reproduce inside host cells. They are smaller than bacteria and contain genetic material surrounded by a protein coat. Viruses come in various shapes and sizes and cause diseases like influenza, measles, HIV/AIDS, and some cancers. Edward Jenner developed the first vaccine for smallpox using a related cowpox virus. Viruses are identified based on their morphology, genetic material, presence of an envelope, capsid shape, host cell, and more. They exist in nature as parasites and depend on host cells for reproduction through lysogenic or lytic cycles.
Hoofdstuk 19 2008 deel 2
This document discusses several aspects of viruses including their life cycles, how they spread, and their classification. It notes that HIV targets lymphocytes and macrophages and causes irreversible damage to the immune system. It also describes how plant viruses can spread horizontally from an external source or vertically through inheritance, and how they move between plant cells via plasmodesmata. Additionally, it defines viroids as naked circular RNA that disrupts plant metabolism and prions as infectious proteins.
Astrovirus
Astroviruses are non-enveloped viruses with positive-sense RNA genomes that cause gastroenteritis. They have an icosahedral capsid containing three major proteins and a genome organized into three open reading frames. ORF1 encodes nonstructural proteins involved in replication, ORF2 encodes the structural capsid polyprotein which is processed by cellular proteases. Infection involves binding to an unknown receptor, translation of viral proteins, processing of polyproteins, replication through a negative-sense intermediate, and assembly of new virions which are released from the cell.
Structure of viruses
The document summarizes key information about viruses, including their discovery, structure, and characteristics. It provides details on different virus shapes (helical, polyhedral, complex) and structures. Specific viruses discussed include tobacco mosaic virus (TMV), adenovirus, bacteriophage T4, and their components. Viruses are described as ultramicroscopic particles that can only be seen with electron microscopes and vary greatly in size and shape. They contain nucleic acids and infect host cells to reproduce.
Virus
A virus is an infectious agent made up of nucleic acid wrapped in a protein coat called a capsid. Viruses have no cell structure of their own and rely on hijacking the cellular machinery of host cells to replicate. They are parasites that infect organisms like bacteria and humans and can cause diseases like HIV. Viruses either contain DNA or RNA but not both and reproduce by injecting their nucleic acid into host cells to replicate their components and assemble new viral particles.
Viruses
Viruses are non-living particles that contain nucleic acid surrounded by a protein coat. They can only replicate inside a host cell by inserting their DNA or RNA and using the host's cellular machinery. There are two main viral replication cycles: lytic, where new viruses are assembled and burst out destroying the host cell, and lysogenic, where the viral DNA integrates into the host genome and replicates with the cell until proteins trigger new virus production. Viruses damage cells by inhibiting protein synthesis, lysing cell membranes, and producing toxic proteins. A lytic virus is most likely to cause a disease like influenza that has short incubation and produces symptoms quickly as it destroys host cells.
33. introduction to virology
The document provides a brief history of smallpox and the development of vaccination. It describes how Edward Jenner used cowpox pus to inoculate and prevent smallpox in the 18th century. It then summarizes the World Health Organization's smallpox eradication program from 1967 to 1979 and contemporary concerns about smallpox being used for bioterrorism.
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The Varicella Zoster Virus causes chickenpox and shingles. It can become dormant in nerve cells. When the immune system weakens in old age, the virus can reactivate and cause a rash outbreak on one side of the body where the virus resides in the dorsal root ganglion. The virus has a lipid envelope, glycoproteins, and a capsid containing double-stranded DNA. It enters cells via membrane fusion initiated by glycoproteins. Inside cells, it takes over the host's DNA replication process. Treatment involves Vidarabine, which is phosphorylated and replaces dATP during viral DNA synthesis, producing faulty viral DNA and halting spread.
Viruses
Viruses are non-cellular, obligate intracellular parasites that consist of nucleic acid (DNA or RNA) surrounded by a protein coat. They can only replicate inside living host cells by using the host's cellular machinery. Viruses come in a variety of shapes and sizes but are generally quite small, ranging from 18-400 nm. They are classified based on their nucleic acid composition and structure. Viruses infect both plants and animals and include important human pathogens.
Introduction to virology
Viruses are the smallest infectious agents and can infect all forms of life. They are obligate intracellular parasites that contain either RNA or DNA. Many important human viruses are described including influenza, measles, hepatitis B, and HIV. Viruses have a protein coat that protects their genetic material and use host cells to replicate. Host responses to viral infection include innate immune defenses and adaptive immune responses like antibodies and T cells. Acute viral infections are generally mild and short-lived while some viruses can establish persistent infections by becoming latent or causing chronic or latent infections.
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7. Cellular Response In Defence In Animals And Plants
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This document discusses viruses and provides information about their structure and life cycle. It defines viruses as non-cellular infectious particles composed of genetic material surrounded by a protein coat. Viruses are described as non-living because they contain no organelles and must use a host cell's machinery to replicate, but are also considered living because they can reproduce and mutate. The document outlines the differences between DNA and RNA viruses and describes viral capsids and envelopes. It explains the lytic and lysogenic replication cycles viruses use to infect host cells and how they are specific to certain kingdoms but not always specific species.
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Viruses are non-living particles that can only reproduce inside host cells. They are much smaller than bacteria and come in various shapes. Viruses cause diseases like smallpox, influenza, and AIDS. They enter cells and use the cell's machinery to replicate themselves before destroying the cell. While viruses cannot live outside of a host, they have developed ways to spread between hosts, such as through respiratory droplets or animal vectors. The best ways to prevent viral spread are vaccination, good hygiene like handwashing, and avoiding contact with infected bodily fluids.
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Viruses are the smallest of all pathogens, ranging from 20-500 nanometers in size, consist of either DNA or RNA surrounded by a protein coat or capsule, and have characteristics of both living and non-living entities. They contain genetic material and can reproduce but only within a host cell by taking over the cell's machinery. Viruses cause infectious disease, come in different shapes, and have the ability to mutate or become dormant.
Understanding basic Virology.ppt
1. Viruses are the smallest infectious agents that can only replicate inside living host cells. They have either DNA or RNA genomes contained within a protein coat called a capsid which may be surrounded by an envelope in some viruses.
2. Viruses come in different shapes defined by their symmetry, with the most common being icosahedral and helical. Their structure allows them to protect their genomes and attach to and enter host cells.
3. Viruses are classified into families based on their nucleic acid composition and replication strategy, with DNA and RNA virus families causing a variety of important human diseases.
Viruses, structure, classification and characteristics
The document discusses viruses, defining them as infectious agents that can only multiply within host cells and consist of nucleic acids and protein coats. It covers virus structure, classification, life cycles, methods of transmission between hosts, discovery, theories of origin, and techniques for studying and cultivating viruses. The document provides an overview of the key aspects of virology, including what viruses are, how they spread and reproduce, approaches to classifying them, and historical developments in the field.
Viruses-and-other organisms-WPS-Office.pptx
Viruses come in a wide range of sizes but are generally quite small, ranging from 10-300 nm in diameter. They have either DNA or RNA as their genetic material and are unable to replicate without hijacking the cellular machinery of a host cell. Viruses can infect all manner of organisms, including humans, animals, plants, fungi, and bacteria. Some viruses are known to cause specific types of cancer in their hosts.
general organization and characterstics of virus
Viruses are nonliving infectious agents that contain either DNA or RNA surrounded by a protein coat called a capsid. They can only reproduce inside of living host cells by hijacking the cell's machinery to produce more viruses. Viruses vary greatly in size and morphology, ranging from 10-400 nanometers, and some have an additional outer envelope acquired from the host cell membrane. They exhibit both living characteristics like reproduction and mutation, as well as nonliving characteristics as they do not metabolize or divide outside of host cells.
07 viruses
Viruses are small infectious particles that contain genetic material and reproduce by inserting their DNA or RNA into host cells. They are not considered living organisms as they do not have cells, lack metabolism, and are obligate intracellular parasites. Viruses can cause diseases in humans and other organisms. They reproduce through lytic and lysogenic cycles and can be transmitted through various methods like contact, air, body fluids, or insect bites depending on the virus. While viruses cause disease, they can also be used to deliver beneficial genes or drugs through viral vectors in applications like gene therapy or chemotherapy. Other infectious particles like viroids and prions also lack cells but can damage crops or brains.
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Viruses, structure, classification and characteristics
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- 4. Are viruses living things?
- 5. A virus CAN REPRODUCE inside a cell that serves as a HOST . A HOST is a living thing that a virus or parasite lives on or in.
- 6. So viruses force the host´s cells to make viruses instead of healthy new cells. You need to remember that cells can produce all their structures, so in certain way they are like tiny factories.
- 8. - Viruses The Lytic Cycle
- 10. Based on their Nucleic Acids: RNA Viruses DNA Viruses
- 11. 1 chain formed by nucleotides 1 helix 2 chains formed by nucleotides 2 helix
- 12. Based on their SHAPE
- 13. CRYSTAL
- 14. CYLINDER
- 15. SPHERES
- 16. SPACECRAFT
- 18. avian influenza RNA virus CYLINDER
- 19. CYLINDER Tobacco mosaic virus (RNA virus)
- 20. Hepatitis B virus (DNA virus) CRISTALS
- 21. Polio virus; RNA virus. CRISTALS
- 22. SPHERES HIV Virus (RNA virus)
- 25. Variola virus, the cause of smallpox (DNA virus) SPHERES
- 26. Influenza A virus (RNA virus) SPHERES
- 27. T4 bacteriophage (DNA virus). SPACECRAFT
- 28. Bacteriophage (DNA virus) SPACECRAFT