Microbiology Mastering Chapters 11-12 – Flashcards
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Pairs of spherical bacterial cells are called __________.
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diplococci
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Which of the following might or might not happen during binary fission?
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separation of daughter cells
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The grouping Archaea is which of the following in the modern taxonomic hierarchy?
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domain
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Which of the following groups of archaea plays an important role in sewage treatment?
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methanogens
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Which of the following is NOT a typical habitat for an extremophile?
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the bottom of a swamp
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Which of the following is characteristic of archaea?
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They lack peptidoglycan cell walls.
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Rhizobium is important agriculturally because it supplies __________ to plants such as peas and beans.
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nitrogen
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Which of the following microbes is NOT pathogenic to humans?
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Agrobacterium
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Why do the botulinum toxins used in Botox NOT cause the symptoms of botulism?
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Botox is injected into the muscles and is not absorbed into other parts of the body.
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Why do cyanobacteria possess heterocysts?
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Heterocysts shield the organism's nitrogen fixation enzymes from oxygen.
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Bergey's Manual contains __________.
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taxonomic information
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Which of the following is NOT multinucleate?
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merozoites
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A scientist isolates a cell that does NOT form a spindle during prophase of mitosis. Which of the following will result in this cell?
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The chromosomes will not separate properly.
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Which of the following groups does NOT include amoebae?
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parabasalids
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When shellfish ingest dinoflagellates, __________.
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they can become poisonous
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Slime molds are NOT classified as fungi, in part because they __________.
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are not absorptive heterotrophs
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Fungi that are aseptate are said to be __________.
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coenocytic
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Which of the following groups of algae is notable for having members with silica cell walls?
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Chrysophyta
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Which of the following divisions of algae is NOT correctly matched to the organisms below?
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Chrysophyta: kelp
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Water molds differ from the fungi in all of the following characteristics EXCEPT __________.
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lack of photosynthetic pigments
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The only arthropod vectors that can spend their entire lifetime associated with one host are __________.
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lice
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Which of the following describes cells that result from meiosis?
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genetically different haploid cells
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What is the key difference between yeast and mold?
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Yeast is unicellular, while mold is multicellular.
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You are given an unknown, pure sample of a eukaryotic organism. Which of the following tests would allow you to determine if the sample contains algae?
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Place the sample in a clear container filled with media containing no sugars, and leave it in a sunny window. After a few weeks, look for growth of the organism.
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Which of the following new chemicals would NOT be effective against Giardia?
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a chemical that inhibits the formation of cell walls
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A patient's sputum culture shows yeast-like growth when incubated at 37 degrees Celsius and filamentous growth when grown at 25 degrees Celsius. Which of the following is true concerning her illness?
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The pathogen is a dimorphic fungus.
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Choose the answer that best describes the three characteristics common to all protozoa.
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eukaryotic, unicellular, lack a cell wall
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The plague is transmitted by (fleas/lice/ticks/mites).
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Fleas
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Fungi reproduce only asexually. (T/F)
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False
