MCAT Biology Question 1: Answer and Explanation
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Question: 1
1. Hyperbaric oxygen may be used as a treatment for certain types of bacterial infections. In this therapy, the patient is placed in a chamber in which the partial pressure of oxygen is significantly increased, increasing the partial pressure of oxygen in the patient's tissues. This treatment is most likely used for infections with:
- A. obligate aerobic bacteria.
- B. facultative anaerobic bacteria.
- C. aerotolerant anaerobic bacteria.
- D. obligate anaerobic bacteria.
Correct Answer: D
Explanation:
Obligate anaerobes cannot survive in the presence of oxygen and would likely be killed by such a therapy, treating the infection. The other types of bacteria listed can all survive in the presence of oxygen and would likely not be treated using this therapy.