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30 Cards in this Set
- Front
- Back
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Drinking water utilities monitor their production system for the occurrence of A. Methanogens B. Coliform bacteria C. Nematodes D. Yeasts |
B. Coliform |
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Milk is usually pasteurized by A. The high temperature short-time method. B. Ultrapasteurization C. The batch method D. Electrical currents |
A. The high temperature short-time method. |
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During sewage treatment, microbial action on a large scale first takes place in the
A. Primary phase B. Secondary phase C. Microbial action is not a part of sewage treatment D. Microbial action takes place after the secondary phase |
B. Secondary phase
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Which of the following is unlikely to be a waterborne pathogen ? A. Giardia lamblia B. Salmonella C. Vibrio D. Staphylococcus |
D. Staphylococcus
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The "bloom" in wine making refers to A. The flowering of the grape plant B. The biofilm on the skin of the grapes C. The fermentation taking place in vats D. None of the above |
B. The biofilm on the skin of the grapes
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When algae produce biofuels, what is the other significant byproduct of photosynthesis? A. CO2 B. Energy C. Waste D. O2 |
D. O2
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Secondary metabolites of microbes are formed during the ______ phase of growth A. Exponential B. Stationary C. Trophophase D. Idiophase |
B. Stationary
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In industrial fermentation, which step precedes downstream processing ? A. Removal of waste B. Introduction of microbes into chamber C. Packaging of product D. Fermentation |
D. Fermentation |
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Which of the following are currently being produced through biotechnology? A. Glycerol B. Vitamins C. Steroids D. All of the above |
D. All the above |
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In biotechnology, fermentation refers to A. The anaerobic metabolism of microorganisms B. The creation of alcohol beverages C. The mass culturing of microorganisms to yield large quantities of products D. All of the above |
C. The mass culturing of microorganisms to yield large quantities of products
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Raw sewage is still being dumped into aquatic environment in many places around the world. |
True |
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Food products should always be kept completely free of microorganisms |
False: food products will usually be colonized by harmless microorganisms |
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Alcoholic beverages are produced by the fermentation of sugar to ethanol and carbon dioxide. |
True |
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The incidence of many food-borne illnesses has been declining for some years now. |
True |
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Refrigerating food prevents growth of all bacteria. |
False: refrigerating food prevents the growth of many bacteria, but some pathogens, such as listeria and salmonella can continue to grow at low temperatures |
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Which of the following is not a major subdivision of the biosphere? A. Hydrosphere B. Lithosphere C. Stratosphere D. Atmosphere |
C. Stratosphere
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A/an _____ is defined as a collection of populations sharing a given habitat A. Biosphere B. Community C. Biome D. Ecosystem |
B. Community
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The quantity of available nutrients ____from the lower levels of the energy pyramid to the higher ones. A. Increases B. Decreases C. Remains stable S. Cycles |
B. Decreases
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Which of the following is considered a greenhouse gas? A. CO2 B. CH4 C. N2O D. All of these |
D. All of these
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Root nodules contain______, which can_____. A. Azotobacter, fix N2 B. Nitrosomonas, nitrify NH3( negative) C. Rhizobia, fix N2 B. Bacillus, dentrify NO3 (negative) |
C. Rhizobia, fix N2
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Which elements has/have an inorganic reservoir that exists primarily in sedimentary deposits? A. Nitrogen B. Phosphorus C. Sulfur D. Both B and C |
D. Both B and C
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What percentage of the earth's biomass is made of microbes ? A. A small fraction B. At least half of it C. All of it D. All of the above |
B. At least half of it
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Genomic analysis of the land, sea, and air has shown us that A. There are many more animals then we expected B. There were much fewer microbes than we expected C. Seawater is much more sterile than we expected D. Microbes colonize places we never imagined |
D. Microbes colonize places we never imagined
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Microbes in the environment are likely to be A. Living in biofilms on surfaces B. Living solitary and planktonic lives C. Nonculturable in the lab D. Two of the above |
D. Two of the above
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Recent studies reveal that A. 100% of photosynthesis is accomplished by plants B. Viruses may well be responsible for some photosynthesis C. The sun is the only source of energy for photosynthesis D. None of the above |
B. Viruses may well be responsible for some photosynthesis
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Pure cultures are very common in the biosphere. |
False: pure cultures are very rare in the biosphere |
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Bioremediation usually involves more than one type of microorganism. |
True |
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The production of all nitrogenous compounds begin with the process called nitrogen fixation. |
True |
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The high mercury content found in some fish is the result of a process called bioaccumulation. |
True |
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As far as we know, all microorganisms exist in multiple-species communities. |
False: one microbe has been found to live in a single-organism community. |
