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Exam 2 UTA Micro Questions and Answers

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  • August 15, 2024
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  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • UTA
  • UTA
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MASTER01
Exam 2 UTA Micro Questions and
Answers

Prokaryote Habitats

✓ ~~~ ubiquitous: hot springs, ice caps, deep ocean, mucosal surfaces



Why are prokaryotes so important

✓ ~~~ v adaptive & resilient, stability of ecosystems, carbon & nitrogen fixation,
environmental cleanup



Mutualism

✓ ~~~ Pop. A and B are benefitted
ex. gut nutrient metabolism




Amensalism

✓ ~~~ Pop. A is harmed and B is unaffected
ex. antimicrobial defense on skin




Commensalism

✓ ~~~ Pop. A is benefitted and B is unaffected
ex. skin cells as food source




Neutralism

✓ ~~~ Both pop. are unaffected
ex. spores in soil

,Parasitism

✓ ~~~ Pop. A is benefitted and B is harmed
ex. tuberculosis




Prokaryote taxonomy

✓ ~~~ molecular, biochemical, microscopy, and nucleotide sequences is best approach for
classification



Gram Negative

✓ ~~~ -proteobacteria
-spirochete

-CFB group

-plantomycetes

-phototrophic




Proteobacteria

✓ ~~~ -alphaproteobacteria
-betaproteobacteria

-deltaproteobacteria gammaproteobacteria

epsilonproteobacteria




Alphaproteobacteria

, ✓ ~~~ -oligotroph (live in low nutrient environment)
-obligate intracellular bacteria

-rickettsia: pleomorphic, cocci rods or threads, rocky mountain spotted fever and

typhus

-chlamydia: coccoid or ovoid, chlamydia




Betaproteobacteria

✓ ~~~ -eutrophs (require many nutrients)
-Bordetella: coccobacillus, aerobic, fastidious, whooping cough

-Neisseria: coccus forming pairs, gonorrhea, meningitis, require moisture and high

concentration of CO2, oxidase positive




Deltaproteobacteria

✓ ~~~ -sulfate reducing
-Myxobacterium: coccoid forming colonies

-Desulfovibrio: comma shaped rod, reduce sulfur

-Bdellovibrio: comma shaped rod, obligate aerobes, parasitic infecting other bacteria




Gammaproteobacteria

✓ ~~~ -most diverse
-Pseudomonas Aeruginosa: bacillus, aerobic, infections of wounds, urinary, and

respiratory tracts

-Pasteurella Haemolytica: pneumonia in animals

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