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23 Cards in this Set
- Front
- Back
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Which organism requires O2 to survive?
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Aerobes
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Which organism uses O2 as final hydrogen factor?
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Aerobes
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Which organism requires no O2?
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Obligate anaerobes
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Which organism dies in the presence of oxygen?
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Obligate anaerobes
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What organism utilizes other molecules for final hydrogen acceptor?
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Obligate anaerobes
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Which organism lacks enzymes superoxide dismutase and catalase to degrade superoxide to water and oxygen?
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Obligate anaerobes
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Why can't obligate anaerobes degrade superoxide to water and oxygen?
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Lacks enzymes superoxide dismutase and catalase
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Which organism can survive with or without oxygen?
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Facultative anaerobes
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Which organism prefers oxygen but will utilize fermentative pathway without oxygen?
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Facultative anaerobes
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Which organism requires little amounts of O2 and can die in excess?
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Microaerophiles
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What happens to microaerophiles with excess oxygen?
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Can die
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Why does aerotolerant anaerobes survive in the presence of oxygen?
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It contains enzymes superoxide dismutase and catalase
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Which organsim contains enzymes superoxide dismutase and catalase?
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Aerotolerant anaerobes
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What organism is like obligate anaerobes but can survive in the presence of oxygen?
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Aerotolerant anaerobes
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What is the shake tube inoculation?
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Bacteria is shaken in melted agar medium and dispersed throughout the test tube. Then it rapidly solidifies
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In the shake tube inoculation, where does obligate aerobic bacteria gather and why?
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At the top of the tube in order to absorb maximal amount of oxygen
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In the tube, where does obligate anaerobic bacteria gather and why?
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At the bottom to avoid oxygen
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Which bacteria is not harmed by lack of oxygen and where can they be found?
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Facultative bacteria. Along the test tube
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Where does facultative bacteria mostly gather and why?
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At the top because aerobic respiration is the most beneficial one
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Which organism requires oxygen but at a low concentration?
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Microaerophiles
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Where do microaerophiles gather on a test tube?
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Upper part of the test tube but not at the top
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Which bacteria is not affected at all by oxygen?
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Aerotolerant bacteria
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Where is aerotolerant bacteria found on a test tube?
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They are evenly spread along the test tube
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