what are the 3 types of oxygen requirements in bacteria?
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['Aerobes: Aerobes grow in ambient air, which contains 21% oxygen and small amount of (0.03%) of carbon dioxide. ... ', 'Obligate aerobes: They have absolute requirement for oxygen in order to grow. ... ', 'Anaerobes: Usually bacteria of this group can not grow in the presence of oxygen, oxygen is toxic for them.']
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Most bacteria grow best within certain ranges of temperature, and have specific requirements related to their need for air, the proper amount of water, acid and salt. By controlling nutrients, water, temperature and time, air, acidity, and salt, you can eliminate, control, or reduce the rate at which bacteria grow.
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Aerobic organisms use oxygen for respiration. Anaerobic organisms adapt to live without oxygen. ... any organism that is able to live without oxygen.
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['oxygen gas.', 'liquid oxygen.', 'oxygen concentrators.', 'hyperbaric oxygen therapy.']
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For each microorganism, there is a set of conditions (both physical and chemical) under which it can survive. Microbes have a variety of physical requirements for growth, including temperature, pH, and water stress.
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Like other anaerobic organisms, anaerobic bacteria do not require oxygen for respiration. Rather various organic and even inorganic materials may be used as electron acceptors during this process.
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['water vapour, H 2O.', 'carbon dioxide, CO. ... ', 'methane, CH. ... ', 'nitrous oxide, N 2O.', 'CFCs (chlorofluorocarbons)']
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['a. Bacteria are prokaryotic cells.', 'b. Like the Eukarya, they have membranes composed of unbranched fatty acid chains attached to glycerol by ester linkages (see Fig. ... ', 'c. The cell walls of Bacteria, unlike the Archaea and the Eukarya, contain peptidoglycan.', 'e.']
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Do anaerobic bacteria require oxidase? No, because anaerobic bacteria do not require oxygen.
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In order to grow in nature or in the laboratory, a bacterium must have an energy source, a source of carbon and other required nutrients, and a permissive range of physical conditions such as O2 concentration, temperature, and pH.
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Oxygen toxicity: Anaerobes lack certain enzymes that are essential for bacteria to survive in presence of oxygen. During growth and metabolism, oxygen reduction products are generated within the organism. ... Therefore, superoxide anion must be removed from the cell in order to survive in presence of oxygen.
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['Single-Celled. Perhaps the most straightforward characteristic of bacteria is their existence as single-celled organisms. ... ', 'Absent Organelles. ... ', 'Plasma Membrane. ... ', 'Cell Walls. ... ', 'DNA.']
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There are five water quality parameters: pH, biological oxygen demand (BOD), suspended solids (SS), dissolved oxygen (DO), and total coliform bacteria.
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['Cell walls: virtually all bacteria contain peptidoglycan in their cell walls; however, archaea and eukaryotes lack peptidoglycan. ... ', 'Fatty acids: bacteria and eukaryotes produce membrane lipids consisting of fatty acids linked by ester bonds to a molecule of glycerol.']
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Glycolysis can take place without oxygen in a process called fermentation. The other three stages of cellular respiration—pyruvate oxidation, the citric acid cycle, and oxidative phosphorylation—require oxygen in order to occur.
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Biological Oxygen Demand (BOD) and Water. Biochemical oxygen demand (BOD) represents the amount of oxygen consumed by bacteria and other microorganisms while they decompose organic matter under aerobic (oxygen is present) conditions at a specified temperature.
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Strictly anaerobic bacteria lacks all enzymes which metabolize hydrogen peroxide and superoxide radicals. ... Aerobic and most facultatively anaerobic bacteria have catalase, which converts hydrogen peroxide to water and oxygen (see Fig.