UTA MICROBIOLOGY ACTUAL EXAM PAPER
2026 QUESTIONS WITH ANSWERS GRADED
A+
◉ 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
◉ Gram Negative Phyla. Answer: -Proteobacteria
-Spirochete
-CFB group
-Planctomycetes
-Phototrophic bacteria
◉ Gram Postitive Phyla. Answer: -Actinobacteria
-Firmicutes
◉ Atypical. Answer: -neither
-tenericutes
,◉ 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
, -Neisseria meningitides: causative agent for bacterial meningitis,
difficult to culture, typically live off our blood
◉ Gammaproteobacteria. Answer: -gram negative
-most diverse
-Pseudomonas aeruginosa - common infection of wounds, urinary tract,
& respiratory tract
-Pasteurella haemolytica - causative agent for severe pneumonia in
animals
-Haemophilus influenza - causative agent for upper & lower respiratory
infections (does not cause influenza)
-Vibrio spp. - commonly found in alkaline environments such as ocean
ports & lagoons, gastrointestinal disease, cellulitis, blood-borne
infections
-Vibrio cholera - causative agent of cholera and common to water
contamination
-Legionella pneumophila- causative agent for Legionnaire's disease and
common to water contamination
-Enterobacter family - includes E. coli, & Salmonella spp., Coliforms -
"E. coli - like" microbes that ferment lactose completely, Noncoliforms -
fermentation of lactose is incomplete or absent
-E. coli - most mutualistic, some produce Shiga toxin
-Salmonella can have multiple serotypes, many that cause salmonellosis
◉ Deltaproteobacteria. Answer: -gram (-) proteobacteria
2026 QUESTIONS WITH ANSWERS GRADED
A+
◉ 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
◉ Gram Negative Phyla. Answer: -Proteobacteria
-Spirochete
-CFB group
-Planctomycetes
-Phototrophic bacteria
◉ Gram Postitive Phyla. Answer: -Actinobacteria
-Firmicutes
◉ Atypical. Answer: -neither
-tenericutes
,◉ 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
, -Neisseria meningitides: causative agent for bacterial meningitis,
difficult to culture, typically live off our blood
◉ Gammaproteobacteria. Answer: -gram negative
-most diverse
-Pseudomonas aeruginosa - common infection of wounds, urinary tract,
& respiratory tract
-Pasteurella haemolytica - causative agent for severe pneumonia in
animals
-Haemophilus influenza - causative agent for upper & lower respiratory
infections (does not cause influenza)
-Vibrio spp. - commonly found in alkaline environments such as ocean
ports & lagoons, gastrointestinal disease, cellulitis, blood-borne
infections
-Vibrio cholera - causative agent of cholera and common to water
contamination
-Legionella pneumophila- causative agent for Legionnaire's disease and
common to water contamination
-Enterobacter family - includes E. coli, & Salmonella spp., Coliforms -
"E. coli - like" microbes that ferment lactose completely, Noncoliforms -
fermentation of lactose is incomplete or absent
-E. coli - most mutualistic, some produce Shiga toxin
-Salmonella can have multiple serotypes, many that cause salmonellosis
◉ Deltaproteobacteria. Answer: -gram (-) proteobacteria
