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11 Cards in this Set
- Front
- Back
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Match the type of organism with its molecular oxygen requirement.
A. capnophile B. obligate anaerobe C. aerotolerant anaerobe D. obligate aerobe E. facultative anaerobe F. microaerophile 1. requires oxygen 2. harmed by molecular oxygen, grow in atmosphere without molecular oxygen 3. use oxygen when available but also able to grow without oxygen 4. requires increased carbon dioxide 5. grow without oxygen but are not harmed by its presence 6. grow in LOW oxygen concentrations (lower than room air) |
1. D
2. B 3. E 4. A 5. C 6. F |
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Cyanobacteria are an example of this type.
A) Chemoautotroph B) Chemoheterotroph C) Photoautotroph D) Photoheterotroph E) None of the above |
C) Photoautotroph
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The term facultative anaerobe refers to an organism that
A) Doesn't use oxygen but tolerates it. B) Is killed by oxygen. C) Uses oxygen or grows without oxygen. D) Requires less oxygen than is present in air. E) Prefers to grow without oxygen. |
C) Uses oxygen or grows without oxygen.
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Which enzyme catalyzes the reaction: 2H2O2 > 2H2O + O2?
A) Catalase B) Oxidase C) Peroxidase D) Superoxide dismutase E) None of the above |
A) Catalase
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Which enzyme catalyzes the reaction: H2O2 + 2H+ > 2H2O?
A) Catalase B) Oxidase C) Peroxidase D) Superoxide dismutase E) None of the above |
C) Peroxidase
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A culture medium on which only gram-positive organisms grow and a yellow halo surrounds Staphylococcus aureus colonies is called a(n)
A) Selective medium. B) Differential medium. C) Enrichment culture. D) B and C. E) A and B. |
E) A and B.
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The addition of which of the following to a culture medium will neutralize acids?
A) Sugars B) pH C) Carbon D) Heat E) Buffers |
E) Buffers
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Which organism produces catalase and superoxide dismutase?
A) Aerotolerant anaerobe B) Obligate anaerobe C) Aerobe |
C) Aerobe
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An experiment began with 4 cells and ended with 128 cells. How many generations did the cells go through?
A) 64 B) 5 C) 6 D) 32 E) 4 |
B) 5
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You have isolated a bacterium that grows in a medium containing an organic substrate and nitrate in the absence of oxygen. The nitrate is reduced to nitrogen gas. This bacterium is
A) A photoauttoph. B) A photoheterotroph. C) Using anaerobic respiration. D) Gram-negative. E) A chemoautotroph. |
C) Using anaerobic respiration.
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Which of the following pairs is mismatched?
A) Dissimilatory sulfate-reducing bacteria > produce H2S B) Cytophaga > a gliding, nonfruiting bacterium C) Actinomycetes > reproduce by fragmentation D) Archaea > live in extreme environments E) Chemoautotrophic bacteria > fix atmospheric nitrogen |
E) Chemoautotrophic bacteria > fix atmospheric nitrogen
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