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Questions and Answers
Which type of bacteria can survive in the presence of oxygen, but respire anaerobically?
Which type of bacteria can survive in the presence of oxygen, but respire anaerobically?
- Obligate aerobes
- Aerotolerant anaerobes (correct)
- Facultative anaerobes
- Obligate anaerobes
Which type of bacteria lacks certain enzymes that detoxify hydrogen peroxide and oxygen free radicals?
Which type of bacteria lacks certain enzymes that detoxify hydrogen peroxide and oxygen free radicals?
- Obligate aerobes
- Facultative anaerobes
- Obligate anaerobes (correct)
- Aerotolerant anaerobes
Which type of bacteria can perform both fermentation and aerobic respiration?
Which type of bacteria can perform both fermentation and aerobic respiration?
- Facultative anaerobes (correct)
- Aerotolerant anaerobes
- Obligate anaerobes
- Obligate aerobes
Which type of bacteria requires the presence of oxygen for growth and cannot carry out fermentation?
Which type of bacteria requires the presence of oxygen for growth and cannot carry out fermentation?
Which type of bacteria lacks certain enzymes that detoxify hydrogen peroxide and oxygen free radicals, making them susceptible to oxygen?
Which type of bacteria lacks certain enzymes that detoxify hydrogen peroxide and oxygen free radicals, making them susceptible to oxygen?
Which type of bacteria can respire anaerobically but can survive in the presence of oxygen?
Which type of bacteria can respire anaerobically but can survive in the presence of oxygen?
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Study Notes
Bacterial Types by Oxygen Requirement and Respiration
- Facultative Anaerobes: Capable of surviving with or without oxygen but prefer anaerobic respiration when oxygen is absent.
- Aerotolerant Anaerobes: Thrive in the presence of oxygen but lack enzymes to detoxify hydrogen peroxide and oxygen free radicals.
- Obligate Anaerobes: Require a complete absence of oxygen for growth; cannot engage in fermentation in its presence.
- Microaerophiles: Need a low concentration of oxygen to survive and cannot perform fermentation.
- Obligate Aerobes: Depend entirely on oxygen for growth and are unable to survive in anaerobic conditions.
- Aerobic Respiration and Fermentation: Some bacteria, like facultative anaerobes, can efficiently switch between fermentation and aerobic respiration depending on the availability of oxygen.
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