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30 Cards in this Set
- Front
- Back
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Atmospheric gases that most often influence microbial growth are ? and ?
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O2 and CO2
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? gas has the greatest impact on microbial growth
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O2(Oxygen gas)
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As Oxygen enters into cellular reactions it is transformed into several toxic products ? and ?
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O2-(one molecule of Oxygen by itself is a free radical)
H2O2(Hydrogen peroxide) |
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Most cells have developed enzymes that go about scavenging and neutralizing the free radical chemicals developed during cellular reaction and the enzymes are ? and ?
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Superoxide dimutase(SOD)
and Catalase |
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Cells that are ? have one or both of the chemicals required to eliminate the free radical 02- and H202 depending on how much O2 they will come in contact with
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aerobic
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SOD and Catalase are ? for aerobic organisms
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essential
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Catalase specifically breaks apart the toxic product ?
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H2O2(hydrogen peroxide)
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An ? can use gaseous Oxygen in its metabolism and possesses the enzymes ? and ? needed to process toxic oxygen products
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aerobe
SOD(Super Oxide Dimutase) Catalase |
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An ? aerobe cannot grow without oxygen
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obigate
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A ? aerobe does not require oxygen for its metabolism and is capable of growth in the absence of it, like the bacteria ?
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facultative
E.coli |
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A ? does not grow at normal atmospheric concentrations of O2 but requires a small amount of it in metabolism
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Microaerophile
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A ? lacks the metabolic enzyme systems for using O2 in ? or ?
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Anaerobe
respiration metabolism |
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?/? anaerobes cannot tolerate any free O2 in the immediate environment and will die if exposed to it.
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Strict
obligate |
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? anaerobes do not utilize oxygen but can survive and grow to a limited extent in its presence. It tolerates O2 but doesn't use it or need it
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Aerotolerant
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O2 is the final ? acceptor in the ETC
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electron
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The device used to grow anaerobic microbes is called a ? or ?
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anaerobic chamber
gas chamber |
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The gas generator envelope has ? added to the chemicals to generate H2 and CO2 and they combine with O2 to form H20 which is visible as ? on the chamber walls
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water
condensation |
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The anaerobic indicator strip is dipped in ? If there is O2 present it will turn ? in color. If there is no O2 present it will stay ? in color
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Methylene blue
blue white |
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Fluid Thioglycolate is a ? media that absorbs oxygen or slows its penetration in the medium.
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reducing
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Fluid Thioglycolate is used for growing ? or used for determining ? requirements
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anaerobes
02 |
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All microbes require some ? in their metabolism
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CO2
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? need a higher amount of CO2 than normally present in atmospheric gas
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capnophiles
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Proteins can be denatured by the pH of ? and ?
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acids and bases
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The majority of organisms live and grow in habitats between pH ? and ?
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6 and 8
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Acidophiles are ? to acidic environments
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obligate
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Proteins can handle slightly ? solutions
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alkaline/basic
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Soaps are ? in nature so they can break apart cell membranes of microbes
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alkaline
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Organisms are more likely to be adapted to ? pH environments
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acidic
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The organism that grows between 0 and 1 pH is ?
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Euglena mutabilis
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Archae that lives in hot coal piles at a pH of 1-2 is ?
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Thermoplasms
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