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19 Cards in this Set
- Front
- Back
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Plants and microorganisms release oxygen into the earth's atmosphere. The percentage of oxygen produced on earth by microorganisms is
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50%
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Bacteria which can survive in hot springs are called
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Hyperthermophiles
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the correct nomenclature for the skin bacterium which can cause food poisoning is
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Staphylococcus aureus should be written in italics with the first letter of the genus in "upper case" and the first letter of the species in "lower case"
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The ancient bacteria which first produced oxygen by photosynthesis belong to the group named
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cyanobacteria
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The three major groups of eukaryotic microorganisms are
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Algae, protozoa (protists) and fungi are the major groups of eukaryotic microorganisms
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Microorganisms have existed on Earth for approximately
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Microorganisms appeared on earth 3.5 billion years ago, approximately 1 billion years after the earth formed
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Microorganisms are found in
a, drinking water b, frozen foods c, aircraft fuel tanks d. the human gastrointestinal tract e, All examples listed |
Microorganisms are ubiquitous and exist in all environments
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Which penicillin-producing species of fungus was discovered by Alexander Fleming
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Penicillium notatum
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In general, which type of infectious disease has been most successfully controlled by antimicrobial agents
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bacterial
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Which of the following traits is NOT characteristic of an endotoxin?
Choose one answer. a. Cell-associated b. Non-specific effect c. Causes fever d. Released on cell lysis e. Specific effect |
non specific
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hich of the following enzymes are produced commercially from bacterial cultures?
Choose one answer. a. Lipases b. Taq polymerase c. All enzymes listed d. Alkaline proteases e. Cellulases |
All
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Escherichia coli 0157:H7, which causes a severe form of food poisoning, is:
Choose one answer. a. an aerobe b. a facultative anaerobe c. a thermophile d. microaerophilic e. a strict anaerobe |
a facultative anaerobe
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The two most common foodborne viruses in the western world are:
Choose one answer. a. influenza virus and norovirus b. chickenpox virus and influenza virus c. chickenpox virus and norovirus d. influenza virus and hepatitis A virus e. norovirus and hepatitis A virus |
Norovirus and hepatitis
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Late blight of potatoes is caused by the microorganism
a. Erwinia amylovora b. Ophiostoma novo-ulmi c. Xanthomonas campestris d. Phytophthora infestans e. Escherichia coli |
Phytophthora infestans
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The "helpful" microorganisms found in probiotic food products may include
a. Aspergillus niger b. Clostridium difficile c. norovirus d. Pseudomonas aeruginosa e. Bifidobacterium bifidum |
Bifidobacterium bifidum is a "helpful" microorganism found in probiotic food
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The most common and important group of microbes responsible for crop disease is
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fungi
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Post-harvest crop losses as a result of disease may be between
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10-30 %
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Which of the following microorganisms is used to produce citric acid
a. Streptomyces griseus b. Fusarium graminearum c. Aspergillus niger d. Saccharomyces cerevisiae e. Lactobacillus bulgaris |
Aspergillus niger
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In order to be an effective antimicrobial agent, properties of selective toxicity are important. Which of the following targets is appropriate
a. Mitochondrial function b. Obligate intracellular parasite c. Cell wall d. Eukaryotic protein synthesis e. Membrane |
cell wall
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