An organism that can use gaseous oxygen in metabolism and has the enzymes to process toxic oxygen products is a(n)
A. aerobe.
B. obligate aerobe.
C. facultative anaerobe.
D. microaerophile.
E. obligate anaerobe.
Answer: A
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Microbiology Chapter 6
- Which of the following is an example of a metabolic activity that could be used to measure microbial growth?
- Which of these quantification methods would be most accurate when quantifying a filamentous mold culture?
- Which nutritional requirement is iron (Fe2+) considered to be a part of?
- During which phases of the bacterial growth curve are there no changes in the number of living cells?
- At which stage of bacterial growth is cell division the most rapid?
- Cells that live in high salt environments are called ________.
- Which of these does not contain nitrogen?
- Which of these microbes would not contain superoxide dismutase?
- All of the following are true about agar except ______.
- The large intestine is an environment that lacks any oxygen. Which of the following types of organisms would most likely be found there?
- What toxic oxygen form of oxygen does the enzyme catalase detoxify?
- While ____ is able to detoxify a reactive oxygen species, it also produces one, hydrogen peroxide.
- At which stage of bacterial growth does cell division NOT occur?
- Lactic acid bacteria, the bacteria involved in making kimchi and yogurt, are strict fermenters. What can you say about their requirements for oxygen?
- Penicillin functions by inhibiting the formation of new cell walls. At what stage of bacterial growth is penicillin most effective? Hint - when do you think cells are making new cell walls?
- You want to quantify a culture of motile bacteria. Which method of quantifying would you use if you needed the most accurate information as soon as possible?
- Salts and sugars work to preserve foods by creating a ____.
- Which of the following is the best definition of generation time?
- What is the difference between peroxidase and catalase?
- Most human pathogens are _________.
- Which method of quantifying bacterial numbers would be most effective for measuring the numbers of bacteria in drinking water, when you expect the numbers to be relatively low?
- Which pH is considered alkaline?
- The term aerotolerant anaerobe refers to an organism that ______.
- In which phase is the rate of cell death equal to the rate of cell growth?
- Luria Broth (LB) is a medium containing Tryptone, yeast extract, and sodium chloride.
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