Questions and Answers
What is a toga?
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.
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Spirochetes are generally easy to culture in the laboratory.
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The deeply branching bacteria contain species that have evolved most recently.
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All the bacteria classified within the genus Bacillus are capable of forming endospores.
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Mycoplasmas are bacteria that lack cell walls.
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Phototrophic bacteria may have carotenoids, which are the red and orange pigments also used as accessory pigments by plants.
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The class Bacilli includes both rod-shaped and spherical bacterial species.
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What is the domain that includes the Crenarchaeota and Euryarchaeota?
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The class that consists of high G+C bacteria is called?
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What are the pigments used by green and purple bacteria for photosynthesis called?
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What source of carbon do purple sulfur bacteria use?
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Variability in cellular shape, as exemplified by mycoplasmas, is described by the term?
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What is the class of Proteobacteria characterized by oligotrophy that includes chlamydias and the rickettsias?
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Organisms that must live within the cells of their hosts are called?
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The Halobacteria are classified within which archaeal phylum?
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What special growth medium is required to culture members of the genus Neisseria?
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The medically important genus Salmonella is classified within which family of the Gammaproteobacteria?
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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.