Prions
... Prions “small proteinaceous infectious agents without a nucleic acid genome……produce spongiform encephalopathies” ...
... Prions “small proteinaceous infectious agents without a nucleic acid genome……produce spongiform encephalopathies” ...
Bacteria and Virus test review
... 6. __________________________Blue green, photosynthetic bacteria 7. __________________________Any microorganism that can cause disease 8. __________________________Poison produced by some bacteria 9. __________________________The most common group of bacteria 10.__________________________A medicine ...
... 6. __________________________Blue green, photosynthetic bacteria 7. __________________________Any microorganism that can cause disease 8. __________________________Poison produced by some bacteria 9. __________________________The most common group of bacteria 10.__________________________A medicine ...
Viruses - mrsteeves
... a. Viruses appear similar to bacteria when studied with a light microscope. b. Viruses display the essential characteristics of living things. c. Viruses can reproduce independently if they contain DNA. d. Viruses cannot reproduce unless they infect a living cell. Slide 29 of 34 Copyright Pearson Pr ...
... a. Viruses appear similar to bacteria when studied with a light microscope. b. Viruses display the essential characteristics of living things. c. Viruses can reproduce independently if they contain DNA. d. Viruses cannot reproduce unless they infect a living cell. Slide 29 of 34 Copyright Pearson Pr ...
Characterizing and Classifying Viruses, Viroids, and Prions
... (malignant). Malignant tumors are also called cancer. The term metastasis describes the spreading of malignant cells, which rob normal cells of space and nutrients, cause pain, and derange the function of affected tissues until eventually the body can no longer withstand the loss of normal function ...
... (malignant). Malignant tumors are also called cancer. The term metastasis describes the spreading of malignant cells, which rob normal cells of space and nutrients, cause pain, and derange the function of affected tissues until eventually the body can no longer withstand the loss of normal function ...
lec3
... 4.Low – temperature steam and formaldehyde. 1. Physio- chemical method . 2. Kills vegetative bacteria , viruses , and spores at 73 Co . 3. Suitable for heat – sensitive items 4. Not suitable for sealed , oily items or those with retained air . ...
... 4.Low – temperature steam and formaldehyde. 1. Physio- chemical method . 2. Kills vegetative bacteria , viruses , and spores at 73 Co . 3. Suitable for heat – sensitive items 4. Not suitable for sealed , oily items or those with retained air . ...
Science Forward--Evolution
... John Dennehy: [6:33] When we produce the results of our data, we often look at them in a graphical form. This very much helps me. I'm a very visual thinker. To determine a relationship between multiple complex variables, it's very helpful to look at them graphically. If you can see the picture you c ...
... John Dennehy: [6:33] When we produce the results of our data, we often look at them in a graphical form. This very much helps me. I'm a very visual thinker. To determine a relationship between multiple complex variables, it's very helpful to look at them graphically. If you can see the picture you c ...
Sheet no.: Last year slides, Medical Virology
... non-enveloped viruses can escape the acidity of the stomach as well as bile secretions and might reach the small and large intestines developing specific types of diseases, for example poliovirus which belongs to enteroviruses that might produce latent infection in our bodies (a very serious diseas ...
... non-enveloped viruses can escape the acidity of the stomach as well as bile secretions and might reach the small and large intestines developing specific types of diseases, for example poliovirus which belongs to enteroviruses that might produce latent infection in our bodies (a very serious diseas ...
chapter05
... Heat to 72° C for 15 sec for most liquids Other objects can withstand higher temps and durations Autoclave High pressure increases boiling temp of water ...
... Heat to 72° C for 15 sec for most liquids Other objects can withstand higher temps and durations Autoclave High pressure increases boiling temp of water ...
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 ...
6/30/14 1 The only goal a virus has is to… General characteristics of
... 2) Oncogenic viruses: Oncogene = the mutated form of a normal, cellular gene involved in cell growth § Mutated oncogenes transform normal cells into cancerous cells. § Can be transferred by DNA oncogenic viruses § The genetic material of oncogenic viruses becomes integrated into the host cell' ...
... 2) Oncogenic viruses: Oncogene = the mutated form of a normal, cellular gene involved in cell growth § Mutated oncogenes transform normal cells into cancerous cells. § Can be transferred by DNA oncogenic viruses § The genetic material of oncogenic viruses becomes integrated into the host cell' ...
7.6 Viruses
... transcriptase. Thus it can be inferred that the virus A. Uses only DNA B. Uses only RNA C. Uses RNA as a template for DNA D. Uses DNA as a template for RNA ...
... transcriptase. Thus it can be inferred that the virus A. Uses only DNA B. Uses only RNA C. Uses RNA as a template for DNA D. Uses DNA as a template for RNA ...
2.7 - mikrobiol unsoed
... All the Virology on the WWW "seeks to be the best single site for Virology information on the Internet. We have collected all the virology related Web sites that might be of interest to our fellow virologists, and others interested in learning more about viruses". ...
... All the Virology on the WWW "seeks to be the best single site for Virology information on the Internet. We have collected all the virology related Web sites that might be of interest to our fellow virologists, and others interested in learning more about viruses". ...
Culture Methods
... infectious for humans and other animal hosts (there is disagreement on this point) • Repair and resuscitation methods improve the detection of viable and potentially cultural bacteria, but, these methods are rarely used to detect pathogens in drinking water. ...
... infectious for humans and other animal hosts (there is disagreement on this point) • Repair and resuscitation methods improve the detection of viable and potentially cultural bacteria, but, these methods are rarely used to detect pathogens in drinking water. ...
Virus - KICS Learns
... (replicate). The virus uses the cell's machinery and some of the cell's enzymes to generate virus parts which are later assembled into thousands of new, mature, infectious virus which can leave the cell to infect other cells. Poliomyelitis virus for example, may have over one million copies of its b ...
... (replicate). The virus uses the cell's machinery and some of the cell's enzymes to generate virus parts which are later assembled into thousands of new, mature, infectious virus which can leave the cell to infect other cells. Poliomyelitis virus for example, may have over one million copies of its b ...
Plant virus genome organization
... Also present in ds replicative form of RNA and in this state RNA was resistant to RNase attack. These experiments demonstrated that the a/a accepting activity was integral part of the viral +ve sense ssRNA Later 3’ terminus of TMV RNA accept histidine MBV RNAs and BSMV RNAs accept tyrosine The terti ...
... Also present in ds replicative form of RNA and in this state RNA was resistant to RNase attack. These experiments demonstrated that the a/a accepting activity was integral part of the viral +ve sense ssRNA Later 3’ terminus of TMV RNA accept histidine MBV RNAs and BSMV RNAs accept tyrosine The terti ...
محاضرة 8
... • Viruses are obligate intracellular parasites • Viruses cannot make energy or proteins independent of a host cell • Viral genome are RNA or DNA but not both. • Viruses have a naked capsid or envelope with attached proteins • Viruses do not have the genetic capability to multiply by division. • Viru ...
... • Viruses are obligate intracellular parasites • Viruses cannot make energy or proteins independent of a host cell • Viral genome are RNA or DNA but not both. • Viruses have a naked capsid or envelope with attached proteins • Viruses do not have the genetic capability to multiply by division. • Viru ...
Biol 179 Study Guide Exam 1
... 2. The biological specialty that deals with the classification and naming of organisms is t ___. 3. The Swedish biologist, Linnaeus, developed a two-part ____ naming system for organisms. 4. The name of an organism according to the binomial system developed by Linnaeus includes both the _____ and th ...
... 2. The biological specialty that deals with the classification and naming of organisms is t ___. 3. The Swedish biologist, Linnaeus, developed a two-part ____ naming system for organisms. 4. The name of an organism according to the binomial system developed by Linnaeus includes both the _____ and th ...
File - Peter Litsas
... Anaerobic bacteria survive without oxygen, and they get energy from fermentation. There are many types of plankton that are considered bacteria. Cyanobacteria produce much of the world’s oxygen, they are also known as blue-green algae. (Science For All Americans) A virus is a non-living infectious a ...
... Anaerobic bacteria survive without oxygen, and they get energy from fermentation. There are many types of plankton that are considered bacteria. Cyanobacteria produce much of the world’s oxygen, they are also known as blue-green algae. (Science For All Americans) A virus is a non-living infectious a ...
Microbiology
... c. The recipient cell has a different set of genes d. New combinations of genes increase the genetic diversity in that population of bacteria 2. Genetic diversity helps to ensure that even if the environment changes, a few bacteria may have the right combinations of genes to survive ...
... c. The recipient cell has a different set of genes d. New combinations of genes increase the genetic diversity in that population of bacteria 2. Genetic diversity helps to ensure that even if the environment changes, a few bacteria may have the right combinations of genes to survive ...
What is Photosynthesis?
... 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 formed from the host cell's plasma membrane. Spi ...
... 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 formed from the host cell's plasma membrane. Spi ...
PowerPoint Presentation - Introduction to viruses
... • Repetitive Structure • High Level of Redundancy ...
... • Repetitive Structure • High Level of Redundancy ...
Chapter 17 Power Point
... About 100 years ago in what is now Ukraine, an epidemic of tobacco mosaic disease occurred that seriously threatened the tobacco crop The disease-causing nature of the juice from infected tobacco leaves was discovered by the ...
... About 100 years ago in what is now Ukraine, an epidemic of tobacco mosaic disease occurred that seriously threatened the tobacco crop The disease-causing nature of the juice from infected tobacco leaves was discovered by the ...
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.