viruses_bacteria
... • By 1997 some bacteria have evolved to the point they are completely immune to ALL antibiotics. ...
... • By 1997 some bacteria have evolved to the point they are completely immune to ALL antibiotics. ...
Virus
... 3.a.1 – DNA, and in some cases RNA, is the primary source of heritable information (19.2). 3.c.3 – Viral replication results in genetic variation, and viral infection can introduce genetic variation into the hosts (19.1 & 19.2). ...
... 3.a.1 – DNA, and in some cases RNA, is the primary source of heritable information (19.2). 3.c.3 – Viral replication results in genetic variation, and viral infection can introduce genetic variation into the hosts (19.1 & 19.2). ...
20_Bacteria and Virus PowerPoint
... Prion – protein particle that causes disease - misfolded proteins in the brain that cause a chain reaction of misfolding in other normal proteins they contact, clogging the brain tissue and causing disease. ...
... Prion – protein particle that causes disease - misfolded proteins in the brain that cause a chain reaction of misfolding in other normal proteins they contact, clogging the brain tissue and causing disease. ...
Chapter 20
... Prion – protein particle that causes disease - misfolded proteins in the brain that cause a chain reaction of misfolding in other normal proteins they contact, clogging the brain tissue and causing disease. ...
... Prion – protein particle that causes disease - misfolded proteins in the brain that cause a chain reaction of misfolding in other normal proteins they contact, clogging the brain tissue and causing disease. ...
Viruses and Bacteria
... Viruses Replicate Inside Living Cells • Viruses lack enzymes needed for metabolism and have no structures to make proteins • Use cells own machinery to replicate viruses • Pathogen: agent that causes disease – Viruses damage cells during replication ...
... Viruses Replicate Inside Living Cells • Viruses lack enzymes needed for metabolism and have no structures to make proteins • Use cells own machinery to replicate viruses • Pathogen: agent that causes disease – Viruses damage cells during replication ...
Bacterial Viruses, Viroids, and Prions
... λ repressor proteins bind to operators repressing transcription of λ genes prophage can be induced to excising → induction to lytic cycle can be the result of: ...
... λ repressor proteins bind to operators repressing transcription of λ genes prophage can be induced to excising → induction to lytic cycle can be the result of: ...
Viruses - Killeen ISD
... Virus Evolution • What makes a virus a “smart” or “successful” virus? – A smart virus is one that does not kill its host right away; moreover, a smart virus wants to be able to survive and reproduce for as long as possible without killing its host. From an evolutionary standpoint, is Ebola a “smart ...
... Virus Evolution • What makes a virus a “smart” or “successful” virus? – A smart virus is one that does not kill its host right away; moreover, a smart virus wants to be able to survive and reproduce for as long as possible without killing its host. From an evolutionary standpoint, is Ebola a “smart ...
d- All the above.
... a. size b. place of discover c. disease cause d. all above true 21. General character of viruses is a. contain only DNA or RNA b. contain a nuclei c. see with nicked eye d. contain flagella 22. Detection of viruses size can be by the follwing ...
... a. size b. place of discover c. disease cause d. all above true 21. General character of viruses is a. contain only DNA or RNA b. contain a nuclei c. see with nicked eye d. contain flagella 22. Detection of viruses size can be by the follwing ...
Chapter 25 Notes Viruses
... Discovery of Viruses Scientists that helped in the discovery of viruses Martinus beijerinck – studied the tobacco plant are concluded that diseased plants could infect the leaves of healthy plants Dr. Wendell Stanley – (1935) the first to isolate the tobacco mosaic virus and show ...
... Discovery of Viruses Scientists that helped in the discovery of viruses Martinus beijerinck – studied the tobacco plant are concluded that diseased plants could infect the leaves of healthy plants Dr. Wendell Stanley – (1935) the first to isolate the tobacco mosaic virus and show ...
chapter 4 review
... CHAPTER 5 REVIEW VIRUS: pg. 84 & 85 Size Extremely small Need electron microscope to see them Shape Varies Structure Protein coat (outside) DNA (inside) (see drawing) How are viruses different from living cells? (see study sheet 2) Viruses cannot do the 4 life processes Viruses are non living Viruse ...
... CHAPTER 5 REVIEW VIRUS: pg. 84 & 85 Size Extremely small Need electron microscope to see them Shape Varies Structure Protein coat (outside) DNA (inside) (see drawing) How are viruses different from living cells? (see study sheet 2) Viruses cannot do the 4 life processes Viruses are non living Viruse ...
virus4
... 2. Lysogenic cycle-may result in lysis of the cell or the virus becomes a permanent part of the chromosome by integrating ...
... 2. Lysogenic cycle-may result in lysis of the cell or the virus becomes a permanent part of the chromosome by integrating ...
Viruses - St Mary
... Retroviruses • Retroviruses also contain RNA as their genetic material. • When a virus infects a cell, it produces a copy of viral DNA from the viral RNA code. • The new DNA becomes part of the hereditary apparatus of the infected human cell. • The host cell does not burst, but it changes permanent ...
... Retroviruses • Retroviruses also contain RNA as their genetic material. • When a virus infects a cell, it produces a copy of viral DNA from the viral RNA code. • The new DNA becomes part of the hereditary apparatus of the infected human cell. • The host cell does not burst, but it changes permanent ...
Viruses - Fillingham
... themselves. Moving from one host to another, viruses pick up pieces of the first host’s DNA and carry it to the next cell to be infected. This is very common in bacteria infected by viruses, where the process is called transduction. ...
... themselves. Moving from one host to another, viruses pick up pieces of the first host’s DNA and carry it to the next cell to be infected. This is very common in bacteria infected by viruses, where the process is called transduction. ...
Food Poisoning Research
... Name ___________________________ Period _________ Date _________________ ...
... Name ___________________________ Period _________ Date _________________ ...
Hepatitis - Arkansas State University
... • Hepatitis is inflammation of the liver – Liver especially important in metabolism • Breakdown of drugs, toxins, waste products – Damage results in accumulation of bilirubin • Bilirubin is a stage in hemoglobin breakdown • Results in yellow color: jaundice – Hepatitis can be caused by several diffe ...
... • Hepatitis is inflammation of the liver – Liver especially important in metabolism • Breakdown of drugs, toxins, waste products – Damage results in accumulation of bilirubin • Bilirubin is a stage in hemoglobin breakdown • Results in yellow color: jaundice – Hepatitis can be caused by several diffe ...
Contributions/Accomplishments
... cells have both of them. These nucleic acids can either double stranded or single stranded. (Next lecture we will learn about DNA and RNA and how living cells use them.) The Membrane Envelope (if present) - some viruses have a fatty (lipid) membrane envelope. This envelope was acquired from the host ...
... cells have both of them. These nucleic acids can either double stranded or single stranded. (Next lecture we will learn about DNA and RNA and how living cells use them.) The Membrane Envelope (if present) - some viruses have a fatty (lipid) membrane envelope. This envelope was acquired from the host ...
DIVERSITY OF LIVING THINGS
... 8) What percent of a virus is made up of the capsid? 9) what does a capsid give the virus? 10) What are Bacteriophages? 11) What do they look like? 12) What special relationship do viruses have with their hosts? 13) what is meant by the term host range? 14) Give two examples of a host range virus in ...
... 8) What percent of a virus is made up of the capsid? 9) what does a capsid give the virus? 10) What are Bacteriophages? 11) What do they look like? 12) What special relationship do viruses have with their hosts? 13) what is meant by the term host range? 14) Give two examples of a host range virus in ...
Viruses - SaddleSpace/Haiku
... Consist of two parts: 1. Nucleic acid core. 2. Outer protein coat called a “capsid”. a) Protein coat determines the shape of the virus. b) Some viruses (animal) have membranous outer envelope instead of/or on top of a protein coat ...
... Consist of two parts: 1. Nucleic acid core. 2. Outer protein coat called a “capsid”. a) Protein coat determines the shape of the virus. b) Some viruses (animal) have membranous outer envelope instead of/or on top of a protein coat ...
Intro to Virology
... • J. Frederick Twort (1915) first isolated viruses that would infect bacteria, but did not follow up on these observations • K. Felix d'Herelle (1917) firmly established the existence of viruses that infect bacteria, and devised a method for enumerating them; he also demonstrated that these viruses ...
... • J. Frederick Twort (1915) first isolated viruses that would infect bacteria, but did not follow up on these observations • K. Felix d'Herelle (1917) firmly established the existence of viruses that infect bacteria, and devised a method for enumerating them; he also demonstrated that these viruses ...
Viruses
... Roles of Bacteria and Viruses • Bacteria play an important role in the environment and in industry. Both bacteria and viruses are important in research. ...
... Roles of Bacteria and Viruses • Bacteria play an important role in the environment and in industry. Both bacteria and viruses are important in research. ...
General Virology - California State University, Fullerton
... – Hijacks protein synthesis from cell(binding cell factors) – Needed to bind to similar viral protein for transcription Potential drug target in red tunnel ...
... – Hijacks protein synthesis from cell(binding cell factors) – Needed to bind to similar viral protein for transcription Potential drug target in red tunnel ...
26 microbial genetics
... - could be specialized (takes genes adjacent to a viral insertion site). ...
... - could be specialized (takes genes adjacent to a viral insertion site). ...
Characteristics
... A Virus attaches to the host and injects its DNA into the cell. B The viral DNA attaches to the host DNA. C DNA replication takes place (Interphase) D The cell undergoes mitosis E Stress causes the viral DNA to create the “weird” protein thus creating an outbreak! ...
... A Virus attaches to the host and injects its DNA into the cell. B The viral DNA attaches to the host DNA. C DNA replication takes place (Interphase) D The cell undergoes mitosis E Stress causes the viral DNA to create the “weird” protein thus creating an outbreak! ...
pathogen
... which normally lives in dog intestines but which can spend part of its life cycle in human host tissues. S Include parasitic nematode worms that live in plant tissue. ...
... which normally lives in dog intestines but which can spend part of its life cycle in human host tissues. S Include parasitic nematode worms that live in plant tissue. ...
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.