bacteria - Pleasantville High School
... Some can be killed off with antibiotics which stop their ...
... Some can be killed off with antibiotics which stop their ...
viruses! - Science with Mrs. Schulte
... NON-LIVING particle that enters and then reproduces inside a living cell. Considered to be NON-LIVING because they are not cells and cannot make or take in food. ...
... NON-LIVING particle that enters and then reproduces inside a living cell. Considered to be NON-LIVING because they are not cells and cannot make or take in food. ...
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 ...
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” ...
Virues and Bacteria
... What is a Virus?? Non-living particles that can’t reproduce; contain nucleic acids (DNA or RNA) and is enclosed in a protein coat *Smaller than the smallest bacterium and must have a host; do replicate on their own *Don’t carry out respiration, develop or grow *Found soil, air, water *Can mutate t ...
... What is a Virus?? Non-living particles that can’t reproduce; contain nucleic acids (DNA or RNA) and is enclosed in a protein coat *Smaller than the smallest bacterium and must have a host; do replicate on their own *Don’t carry out respiration, develop or grow *Found soil, air, water *Can mutate t ...
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 ...
BACTERIA - Virus and Bacteria worksheet
... 8. ________ The host cell explodes, releasing more viruses. ...
... 8. ________ The host cell explodes, releasing more viruses. ...
4C Viruses
... are not living because they must live inside another cell and use the host’s machinery to reproduce and synthesize proteins. A virus consists of nucleic acids (DNA or RNA) in a capsid (protein coat) and is much smaller than a cell. 2. Viruses reproduce either by using the host cell’s machinery to re ...
... are not living because they must live inside another cell and use the host’s machinery to reproduce and synthesize proteins. A virus consists of nucleic acids (DNA or RNA) in a capsid (protein coat) and is much smaller than a cell. 2. Viruses reproduce either by using the host cell’s machinery to re ...
1.3 Viruses are not alive but affect living things. Vocabulary Host cell
... Share some characteristics with living things (organized) Not considered living things because they cannot grow, respond or reproduce without help from the host cell. Use host cells to make copies of themselves 5 steps are attachment, injection, production, assembly, and release Once the v ...
... Share some characteristics with living things (organized) Not considered living things because they cannot grow, respond or reproduce without help from the host cell. Use host cells to make copies of themselves 5 steps are attachment, injection, production, assembly, and release Once the v ...
Our selections for Fall 2005
... – Mixing of viruses that infect birds, pigs, produce new strains able to jump to humans. – New antigenic type leaves population unprotected – Numerous epidemics throughout history • Flu of 1918-1919 killed 20 million – Asia watched very carefully: bird flu? ...
... – Mixing of viruses that infect birds, pigs, produce new strains able to jump to humans. – New antigenic type leaves population unprotected – Numerous epidemics throughout history • Flu of 1918-1919 killed 20 million – Asia watched very carefully: bird flu? ...
Viruses - saddlespace.org
... Not capable of reproduction without a host So, are viruses living things? Most biologists say they are not…they are on the border of non-living and living. SPOOKY! ...
... Not capable of reproduction without a host So, are viruses living things? Most biologists say they are not…they are on the border of non-living and living. SPOOKY! ...
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 - Elgin Local Schools
... • Particles of nucleic acid, protein, some lipids • Reproduce vicariously • Use the cells they infect to build new viruses ...
... • Particles of nucleic acid, protein, some lipids • Reproduce vicariously • Use the cells they infect to build new viruses ...
Viruses - Elgin Local Schools
... • Particles of nucleic acid, protein, some lipids • Reproduce vicariously • Use the cells they infect to build new viruses ...
... • Particles of nucleic acid, protein, some lipids • Reproduce vicariously • Use the cells they infect to build new viruses ...
Name - TeacherPage.com
... 5. Why are most viruses highly specific to the cells they infect? 6. What are bacteriophages? 7. Complete the flowchart about a lytic infection. The bacteriophage attaches to the bacterium’s ___________________. ...
... 5. Why are most viruses highly specific to the cells they infect? 6. What are bacteriophages? 7. Complete the flowchart about a lytic infection. The bacteriophage attaches to the bacterium’s ___________________. ...
Viruses - Mr. Enns
... WANTED DEAD OR ALIVE?? 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! ...
... WANTED DEAD OR ALIVE?? 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 - Spanish Point Biology
... a) Attach – the ………..attaches to the …………….. of the host cell. b) Inject – the virus injects its ……….(or ……)through the cell wall/membrane into the host cell. c) Copy – the virus uses host cell’s ………. to copy its ………./RNA. d) Make – the virus uses the host cell’s ribosomes to make new ……… coats. e) ...
... a) Attach – the ………..attaches to the …………….. of the host cell. b) Inject – the virus injects its ……….(or ……)through the cell wall/membrane into the host cell. c) Copy – the virus uses host cell’s ………. to copy its ………./RNA. d) Make – the virus uses the host cell’s ribosomes to make new ……… coats. e) ...
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. ...
Introduction to viruses
A virus is a biological agent that reproduces inside the cells of living hosts. When infected by a virus, a host cell is forced to produce many thousands of identical copies of the original virus, at an extraordinary rate. Unlike most living things, viruses do not have cells that divide; new viruses are assembled in the infected host cell. But unlike still simpler infectious agents, viruses contain genes, which gives them the ability to mutate and evolve. Over 5,000 species of viruses have been discovered.The origins of viruses are unclear: some may have evolved from plasmids—pieces of DNA that can move between cells—while others may have evolved from bacteria. A virus consists of two or three parts: genes, made from either DNA or RNA, long molecules that carry genetic information; a protein coat that protects the genes; and in some viruses, an envelope of fat that surrounds and protects them when they are not contained within a host cell. Viruses vary in shape from the simple helical and icosahedral to more complex structures. Viruses range in size from 20 to 300 nanometres; it would take 30,000 to 750,000 of them, side by side, to stretch to 1 centimetre (0.39 in).Viruses spread in many ways. Just as many viruses are very specific as to which host species or tissue they attack, each species of virus relies on a particular method for propagation. Plant viruses are often spread from plant to plant by insects and other organisms, known as vectors. Some viruses of animals, including humans, are spread by exposure to infected bodily fluids. Viruses such as influenza are spread through the air by droplets of moisture when people cough or sneeze. Viruses such as norovirus are transmitted by the faecal–oral route, which involves the contamination of hands, food and water. Rotavirus is often spread by direct contact with infected children. The human immunodeficiency virus, HIV, is transmitted by bodily fluids transferred during sex. Others, such as the Dengue virus, are spread by blood-sucking insects.Viral infections can cause disease in humans, animals and even plants. However, they are usually eliminated by the immune system, conferring lifetime immunity to the host for that virus. Antibiotics have no effect on viruses, but antiviral drugs have been developed to treat life-threatening infections. Vaccines that produce lifelong immunity can prevent some viral infections.