Microbiology Chapter 4 (Part 2) Flashcards
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Questions and Answers

What is a toga?

  • An outer membrane found in a taxon within the deeply branching bacteria (correct)
  • A form of bacterial infection
  • A species of bacteria
  • A type of ancient Roman clothing
  • The bacterial species found associated with the human body are very similar from one individual to another.

    False

    The phototrophic bacteria do not form a distinct taxonomic group.

    True

    Although Archaea cannot be classified as gram positive or gram negative, all Bacteria can be classified into one of these two categories.

    <p>False</p> Signup and view all the answers

    Spirochetes are generally easy to culture in the laboratory.

    <p>False</p> Signup and view all the answers

    The deeply branching bacteria contain species that have evolved most recently.

    <p>False</p> Signup and view all the answers

    All the bacteria classified within the genus Bacillus are capable of forming endospores.

    <p>True</p> Signup and view all the answers

    Mycoplasmas are bacteria that lack cell walls.

    <p>True</p> Signup and view all the answers

    Phototrophic bacteria may have carotenoids, which are the red and orange pigments also used as accessory pigments by plants.

    <p>True</p> Signup and view all the answers

    The class Bacilli includes both rod-shaped and spherical bacterial species.

    <p>True</p> Signup and view all the answers

    What is the domain that includes the Crenarchaeota and Euryarchaeota?

    <p>Archaea</p> Signup and view all the answers

    The class that consists of high G+C bacteria is called?

    <p>Actinobacteria</p> Signup and view all the answers

    What are the pigments used by green and purple bacteria for photosynthesis called?

    <p>bacteriochlorophylls</p> Signup and view all the answers

    What source of carbon do purple sulfur bacteria use?

    <p>carbon dioxide</p> Signup and view all the answers

    Variability in cellular shape, as exemplified by mycoplasmas, is described by the term?

    <p>pleomorphic</p> Signup and view all the answers

    What is the class of Proteobacteria characterized by oligotrophy that includes chlamydias and the rickettsias?

    <p>Alphaproteobacteria</p> Signup and view all the answers

    Organisms that must live within the cells of their hosts are called?

    <p>obligate intracellular pathogens</p> Signup and view all the answers

    The Halobacteria are classified within which archaeal phylum?

    <p>Euryarchaeota</p> Signup and view all the answers

    What special growth medium is required to culture members of the genus Neisseria?

    <p>chocolate</p> Signup and view all the answers

    The medically important genus Salmonella is classified within which family of the Gammaproteobacteria?

    <p>Enterobacteriaceae</p> Signup and view all the answers

    Study Notes

    Toga

    • A toga refers to an outer membrane found in a taxon of deeply branching bacteria.

    Bacterial Species Variability

    • Human-associated bacterial species vary significantly between individuals.

    Phototrophic Bacteria Taxonomy

    • Phototrophic bacteria do not form a distinct taxonomic group.

    Bacterial Classification

    • Archaea cannot be categorized as gram positive or gram negative; however, all Bacteria can be classified into these categories.

    Spirochetes Cultivation

    • Spirochetes are not generally easy to culture in laboratory settings.

    Deeply Branching Bacteria Evolution

    • Deeply branching bacteria comprise species that have evolved earlier, not more recently.

    Bacillus Genus

    • Every bacterium classified under the genus Bacillus is capable of forming endospores.

    Mycoplasmas Characteristics

    • Mycoplasmas are unique bacteria that lack cell walls.

    Photosynthetic Pigments

    • Phototrophic bacteria may contain carotenoids, which are red and orange pigments, serving as accessory pigments in plants.

    Class Bacilli

    • The class Bacilli includes bacterial species that are both rod-shaped and spherical.

    Archaeal Domains

    • The domain "Archaea" encompasses the subclasses Crenarchaeota and Euryarchaeota.

    Actinobacteria Class

    • The class Actinobacteria comprises high G+C content bacteria.

    Photosynthesis Pigments in Bacteria

    • Green and purple bacteria utilize bacteriochlorophylls for photosynthesis, which are colored green, purple, or blue.

    Carbon Source in Purple Sulfur Bacteria

    • Purple sulfur bacteria use carbon dioxide as their carbon source.

    Cellular Shape Variability

    • The term "pleomorphic" describes variability in cellular shape, as seen in mycoplasmas.

    Class of Proteobacteria

    • Alphaproteobacteria is a class of Proteobacteria known for oligotrophy and includes chlamydias and rickettsias.

    Intracellular Pathogens

    • Organisms that must live within host cells are classified as obligate intracellular pathogens.

    Halobacteria Classification

    • Halobacteria are classified within the archaeal phylum Euryarchaeota.

    Neisseria Cultivation

    • A special growth medium known as chocolate agar is required to culture members of the genus Neisseria.

    Salmonella Classification

    • The medically significant genus Salmonella belongs to the Enterobacteriaceae family within the Gammaproteobacteria class.

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    Test your knowledge with flashcards from Microbiology Chapter 4 (Part 2). This quiz covers key concepts including bacterial taxonomy and characteristics. Perfect for review before exams or to reinforce learning.

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