Practice Questions
Taxonomy (Groups)

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1. Which group is helically coiled with one or more axial fibrils associated with it?
   
   1. spirochetes
   2. curved bacteria
   3. gram-negative aerobic rods
   4. gram-positive cocci
   5. gram-negative anaerobic rods
   
   
   
2. Which organism is able to penetrate and reproduce within prokaryotic cells?
   
   1. Campylobacter
   2. Microcyclus
   3. Spirillum
   4. Bdellovibrio
   5. Aquaspirillum
   
   
   
3. Some strains of the Pseudomonadaceae carry out anaerobic respiration. Can you give an example?
   
   1. They use nitrate as a terminal electron acceptor.
   2. In the denitrification process, they form molecular nitrogen.
   3. They fix atmospheric nitrogen.
   4. a and b
   5. All of these.
   
   
   
4. Which of the following species may produce tumorous growths called galls on plants?
   
   1. Rhizobium
   2. Azobacter
   3. Agrobacterium
   4. Legionella
   5. Bradyrhizobium
   
   
   
5. What do Escherichia, Salmonella, and Shigella species have in common?
   
   1. They are Gram-negative rods.
   2. They are facultative anaerobes.
   3. They are members of the Enterobacteriaceae.
   4. They are considered enteric bacteria.
   5. All of the above.
   
   
   
6. Which association is mismatched?
   
   1. Clostridium tetani - Cholera
   2. C. perfringens - Gas gangrene
   3. Staphylococcus aureus - food poisoning
   4. Psittacosis - Chlamydia
   5. Rocky Mt. spotted fever - Ticks/Rickettsia rickettsii
   
   
   
7. How do the Cyanobacteria differ from other phototrophic bacteria?
   
   1. The Cyanobacteria do not photosynthesize; the other phototrophic bacteria are capable of photosynthesis.
   2. The Cyanobacteria contain carotenoids; the other phototrophic bacteria do not contain carotenoids.
   3. Most Cyanobacteria split water to form oxygen; the anoxygenic phototrophic bacteria do not produce oxygen.
   4. Most Cyanobacteria do not produce oxygen; the anoxygenic phototrophic bacteria are capable of producing oxygen.
   5. a and b
   
   
   
8. How are chemolithotrophic bacteria defined?
   
   1. They are thermophilic, spore formers.
   2. They oxidize inorganic compounds to generate ATP.
   3. They oxidize organic compounds to generate ATP.
   4. They are widely distributed in nature and are important in denitrification.
   5. They play a significant role as part of the normal microbiota of the human digestive tract.
   
   
   
9. Which organism is associated with acid mine drainage and causes ecological damage?
   
   1. Siderocapsa species
   2. Caulobacter species
   3. Thiobacillus thiooxidans
   4. Flexibacter species
   5. Rhodomicrobium species
   
   
   
10. Of what significance is the cell appendage known of as the "prosthecae"?
    
    1. It serves an important purpose in reproduction.
    2. It enhances motility among certain bacteria.
    3. It allows the organism to survive in areas of low nutrient concentration by providing a greater surface area for nutrient uptake.
    4. It allows bacteria to adhere to each other, forming rosettes.
    5. c and d

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