UTA-Microbiology Exam 2-Dr.Parks
Questions And Answers With Verified
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Updated 2024
Prokaryotes Habitats - ANSWER✔✔ -found in hot springs, ice caps, deep ocean,
skin, and mucosal surfaces
-are ubiquitous
-why: they are very adaptable and resilient and are able to switch metabolic
respiration methods
-diversity is important: stability of ecosystems, carbon and nitrogen fixation,
environmental cleanup
-human pathogens and climate change
Microbiomes - ANSWER✔✔ -The diverse communities of bacteria that live on or
within the body and are essential to bodily function.
-prokaryotes + eukaryote microbes = microbiome
-differ btwn different sites and organisms
-resident: natural there
-transient: not there or there for a short while
Mutualism - ANSWER✔✔ -both are benefitted
-ex: gut nutrient metabolism
Amensalism - ANSWER✔✔ -A is harmed and B is unaffected
-ex: antimicrobial defense on skin
,Commensalism - ANSWER✔✔ -A is benefitted and B is unaffected
-ex: skin cells as food source
Neutralism - ANSWER✔✔ -both are unaffected
-ex:spores in soil
Parasitism - ANSWER✔✔ -A is benefitted and B is harmed
-ex: tuberculosis, leprosy, etc.
Taxonomy of Prokaryotes - ANSWER✔✔ -do not reproduce sexually
-not many distinctive morphological features
-molecular, biochemical, microscopi, and nucleotide sequences together is best
approach
Alphaproteobacteria - ANSWER✔✔ -gram (-) proteobacteria
-oligotrophs: lives in low nutrient environments
-obligate intracellular and must have host to be metabolically active
-Rickettsia spp.: causative agent for Rocky Mountain spotted fever and typhus
fever, transmitted from tick, others spread through lice
-Chlamydia spp.: causative agents for lymphogranuloma venereum (STD), spreads
rapidly, endospore like
Agrobacterium - ANSWER✔✔ -gram-negative bacillus
-plant pathogen, one species
-A.tumefaciens causes tumors in plants
Rhizobium - ANSWER✔✔ -gram-negative, rectangular bacilli with rounded ends
forming clusters
- nitrogen fixing batters that live in soil and form symbiotic relationship with roots
of legumes
Betaproteobacteria - ANSWER✔✔ -gram (-) proteobacteria
-eutrophs: require many nutrients (copiotrophs)
-Bordetella spp.: causative agents with whooping cough (pertussis) and kneel
cough (dogs), produce toxins to paralyze lung cilia
-Neisseria gonorrhea: causative agent for gonorrhea STD, painful peeing
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