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23 Cards in this Set

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