animal cells have a plasma membrane
... leaves through a porcelain filter that retains bacteria leaves still got disease something smaller than bacteria was causing disease ...
... leaves through a porcelain filter that retains bacteria leaves still got disease something smaller than bacteria was causing disease ...
Avian Influenza – The Bird Flu
... • The naturally occurring disease found in most birds, ducks, and fowls passes the disease through their excretions on the ground. • Since the disease is highly contagious among birds it is then passed to domestic birds such as turkeys and chickens. • The virus is then passed to mammals and humans w ...
... • The naturally occurring disease found in most birds, ducks, and fowls passes the disease through their excretions on the ground. • Since the disease is highly contagious among birds it is then passed to domestic birds such as turkeys and chickens. • The virus is then passed to mammals and humans w ...
Section I Section I
... microscope and a metal shadowing technique to identify tobacco mosaic virus in purified preparations. Ultrastructural studies of viruses were greatly expanded and enhanced in the 1950s by the development of negative staining and methods for cutting ultrathin sections. X-ray diffraction methods have ...
... microscope and a metal shadowing technique to identify tobacco mosaic virus in purified preparations. Ultrastructural studies of viruses were greatly expanded and enhanced in the 1950s by the development of negative staining and methods for cutting ultrathin sections. X-ray diffraction methods have ...
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 ...
... 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 ...
Biol 179 Study Guide Exam 1
... synthesis for the capsid formation D) the integration and stabilizing of a virus into its capsid, which provides protection until conditions are better for reproduction 18. If a virus enters the lytic phase in a host's cell, it will cause A) the host cell to reject the virus B) the host cell to shri ...
... synthesis for the capsid formation D) the integration and stabilizing of a virus into its capsid, which provides protection until conditions are better for reproduction 18. If a virus enters the lytic phase in a host's cell, it will cause A) the host cell to reject the virus B) the host cell to shri ...
Inquiry into Life, Eleventh Edition
... • Biology of viruses-noncellular, obligate parasites – Viral structure • 0.2 microns in size, much smaller than bacteria • Many shapes- rods, blocks, polyhedrons • 2 basic parts – Outer capsid of protein subunits – Inner core of nucleic acid » Can be either double-stranded DNA. Single-stranded DNA, ...
... • Biology of viruses-noncellular, obligate parasites – Viral structure • 0.2 microns in size, much smaller than bacteria • Many shapes- rods, blocks, polyhedrons • 2 basic parts – Outer capsid of protein subunits – Inner core of nucleic acid » Can be either double-stranded DNA. Single-stranded DNA, ...
Chp.5 Infections
... Viruses • Live by penetrating cells • Resistant to antibiotics • Vaccination will prevent – Not available for all viruses ...
... Viruses • Live by penetrating cells • Resistant to antibiotics • Vaccination will prevent – Not available for all viruses ...
What is Photosynthesis?
... that causes AIDS. Inside, genetic material is surrounded by a protein coat and molecules of reverse transcriptase, an enzyme that catalyzes the transcription of DNA from the viral RNA template after the virus enters the host cell. This virus is among those that also have an outer envelope that is fo ...
... that causes AIDS. Inside, genetic material is surrounded by a protein coat and molecules of reverse transcriptase, an enzyme that catalyzes the transcription of DNA from the viral RNA template after the virus enters the host cell. This virus is among those that also have an outer envelope that is fo ...
New virus - Da Bronco Plug
... (1) is replicated and passed on to daughter cells and (2) can be induced to leave the chromosome and initiate a lytic cycle ...
... (1) is replicated and passed on to daughter cells and (2) can be induced to leave the chromosome and initiate a lytic cycle ...
Sheet no.: Last year slides, Medical Virology
... and by this, the cycle of the living virus would not be completed, because those enzymes and proteins were necessary for the completion. (Make the infected cells resistant to the viral infection). In addition, they (the interferons) activate immune system and therefore cells like the natural killing ...
... and by this, the cycle of the living virus would not be completed, because those enzymes and proteins were necessary for the completion. (Make the infected cells resistant to the viral infection). In addition, they (the interferons) activate immune system and therefore cells like the natural killing ...
ch_13_study guide
... host cell. A virus that infects bacteria is referred to as a bacteriophage, or simply a phage. Viruses also infect humans, other animals, plants, and even fungi and protozoa. Sizes of Viruses Viruses are so small that most cannot be seen by light microscopy. The smallest have a diameter of 10 nm, wh ...
... host cell. A virus that infects bacteria is referred to as a bacteriophage, or simply a phage. Viruses also infect humans, other animals, plants, and even fungi and protozoa. Sizes of Viruses Viruses are so small that most cannot be seen by light microscopy. The smallest have a diameter of 10 nm, wh ...
Microbes
... 7. Explain the lytic and lysogenic cycles in viruses. What happens in each? Lytic-virus invades cell, makes new viral parts using the host materials, assembly of new virus, release of virus often destroys host cell. Lysogenic- virus invades cell and becomes part of the host DNA. When host cell divid ...
... 7. Explain the lytic and lysogenic cycles in viruses. What happens in each? Lytic-virus invades cell, makes new viral parts using the host materials, assembly of new virus, release of virus often destroys host cell. Lysogenic- virus invades cell and becomes part of the host DNA. When host cell divid ...
lesson plan - jennifer martiny lab
... i. Ribosomes are like the ovens of a cell if a cell were like a house. These “ovens” help “bake” things that the cell needs like proteins. ii. Proteins are the building blocks of cells and can even create more cells – cell babies. Ribosomes, however, are not the power houses of a cell since they can ...
... i. Ribosomes are like the ovens of a cell if a cell were like a house. These “ovens” help “bake” things that the cell needs like proteins. ii. Proteins are the building blocks of cells and can even create more cells – cell babies. Ribosomes, however, are not the power houses of a cell since they can ...
General Properties of virus
... It is very smallest infectious agent (20 –350nm) Obligate intracellular parasites Contain only one type of nucleic acid, either DNA or RNA Do not possess cellular organization Lacks enzymes necessary for protein & NA synthesis Depends on host cell machinery for replication Causes a large ...
... It is very smallest infectious agent (20 –350nm) Obligate intracellular parasites Contain only one type of nucleic acid, either DNA or RNA Do not possess cellular organization Lacks enzymes necessary for protein & NA synthesis Depends on host cell machinery for replication Causes a large ...
ch_13_study guide
... Animal viruses have the same five basic replication pathways as bacteriophages, but some differences result in part from the presence of envelopes around some of the viruses and in part from the eukaryotic nature of animal cells and their lack of a cell wall. Attachment of Animal Viruses Animal viru ...
... Animal viruses have the same five basic replication pathways as bacteriophages, but some differences result in part from the presence of envelopes around some of the viruses and in part from the eukaryotic nature of animal cells and their lack of a cell wall. Attachment of Animal Viruses Animal viru ...
Microorganisms Power Point
... The respiratory failure and paralysis that occur with severe botulism may require a patient to be on a breathing machine (ventilator) for weeks, plus intensive medical and nursing care. After several weeks, the paralysis slowly improves. If diagnosed early, foodborne and wound botulism can be treat ...
... The respiratory failure and paralysis that occur with severe botulism may require a patient to be on a breathing machine (ventilator) for weeks, plus intensive medical and nursing care. After several weeks, the paralysis slowly improves. If diagnosed early, foodborne and wound botulism can be treat ...
Questions from the Audience
... Model • Common preconceptions identified in previous study • Treatment group received education tailored to previously identified preconceptions • Control group received similar education without consideration of preconceptions ...
... Model • Common preconceptions identified in previous study • Treatment group received education tailored to previously identified preconceptions • Control group received similar education without consideration of preconceptions ...
File
... 2. Bacteria – unicellular organisms that are classified according to their shapes; they are found everywhere. They are found in air, soil, water, on plants and animals, etc. Can be heterotrophic or autotrophic. Most utilize oxygen, but some operate anaerobically. Can be beneficial or harmful. The mo ...
... 2. Bacteria – unicellular organisms that are classified according to their shapes; they are found everywhere. They are found in air, soil, water, on plants and animals, etc. Can be heterotrophic or autotrophic. Most utilize oxygen, but some operate anaerobically. Can be beneficial or harmful. The mo ...
Lab
... 3) Which statement below correctly identifies the reason why viruses are not considered alive? I choose this answer because __________________ a) They have DNA or RNA b) They have a protein coat ___________________________________________ c) They are really small d) They can only reproduce inside ce ...
... 3) Which statement below correctly identifies the reason why viruses are not considered alive? I choose this answer because __________________ a) They have DNA or RNA b) They have a protein coat ___________________________________________ c) They are really small d) They can only reproduce inside ce ...
Biology Study Guide
... inheritance. Interpret a pedigree. Understand the consequences of sex-linked disorders. DNA (Ch 9-11) What does DNA stand for? Where is DNA located? Who discovered DNA? Describe the structure of DNA. Describe the base-pairing rules for DNA. Describe the process of gel electrophoresis. What is electr ...
... inheritance. Interpret a pedigree. Understand the consequences of sex-linked disorders. DNA (Ch 9-11) What does DNA stand for? Where is DNA located? Who discovered DNA? Describe the structure of DNA. Describe the base-pairing rules for DNA. Describe the process of gel electrophoresis. What is electr ...
C. Primary Morphological types[3]
... insufficient to code for more than a few sorts of protein molecules of limited size. The only reasonable way to build a protein shell, therefore, was to use the same type of molecule over and over again, hence their theory of identical subunits, symmetrically packed to form the protein shell.” 3. CA ...
... insufficient to code for more than a few sorts of protein molecules of limited size. The only reasonable way to build a protein shell, therefore, was to use the same type of molecule over and over again, hence their theory of identical subunits, symmetrically packed to form the protein shell.” 3. CA ...
Transport of Viruses, Bacteria, and Protozoa in Groundwater
... Cryptosporidium, the “hidden germ” about 400,000 illnesses, greater than 100 deaths DNA evidence: human, not bovine, origin ...
... Cryptosporidium, the “hidden germ” about 400,000 illnesses, greater than 100 deaths DNA evidence: human, not bovine, origin ...
eprint_5_13643_353
... genomic-size transcript because the virus is able to replicate in enucleated cells. Class III (e.g. paramyxoviruses, rhabdoviruses.) The genome is of -ve polarity to the messenger. A virion RNA-dependent RNA transcriptase first transcribes the genomes into separate monocistronic messengers initiatin ...
... genomic-size transcript because the virus is able to replicate in enucleated cells. Class III (e.g. paramyxoviruses, rhabdoviruses.) The genome is of -ve polarity to the messenger. A virion RNA-dependent RNA transcriptase first transcribes the genomes into separate monocistronic messengers initiatin ...
Viruses and Bacteria
... cells. It is a retrovirus (RNA in virus) Can have a dormancy of many years A person infected with the HIV virus will die from some other illness because the HIV attacks and kills the white blood cells (which attack and kill pathogens in the body) Some viruses cause cancer or tumors. Warts are ...
... cells. It is a retrovirus (RNA in virus) Can have a dormancy of many years A person infected with the HIV virus will die from some other illness because the HIV attacks and kills the white blood cells (which attack and kill pathogens in the body) Some viruses cause cancer or tumors. Warts are ...
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 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 ...
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.