Microbiology Exam 3 With All Graded
Exams Super Offer!!!
E - CORRECT ANSWER✔✔Microorganisms that "mineralize" organic compounds (select the essence of
mineralization, not from Wikipedia)
A. render them less toxic.
B. degrade them to minerals such as the salts of calcium, magnesium and potassium.
C. reduce them to methane.
D. render them water-soluble.
E. oxidize them to CO2.
A - CORRECT ANSWER✔✔Which of the below is notorious in Florida and elsewhere as the cause of
necrotic skin- and flesh-lesions?
A. Vibrio vulnificus
B. V. badassificus
C. V. fischeri
D. V. cholerae
E. V. parahemolyticus
B - CORRECT ANSWER✔✔Which causes a true "food poisoning," i.e., elaborates a toxin outside of the
host body in contrast to infecting the host gut and causing a gastroenteritis, though often mediated by
toxins.
A. Clostridium botulinum
,B. Staphylococcus aureus
C. A and B
D. Salmonella typhi
E. Vibrio cholerae
D - CORRECT ANSWER✔✔What term describes microbially mediated anaerobic oxidation of ammonia?
A. methanogenesis
B. diazotrophy
C. anamox
D. nitrification
E. autotrophy
A - CORRECT ANSWER✔✔A vaccine that protects against diphtheria, pertussis and tetanus (DPT)
addresses etiological agents with which of the respective gram reactions.
A. +/-/+
B. -/-/+
C. +/+/-
D. -/+/-
E. +/+/+
B - CORRECT ANSWER✔✔The above referenced DPT vaccine protects against bacterial diseases, the
etiological agents of which are currently assigned to which respective bacterial phyla (Phylum level)?
A. Actinobacteria/ Firmicutes/ Proteobacteria
B. Actinobacteria/ Proteobacteria/ Firmicutes
C. Actinobacteria/ Firmicutes/ Archaea
D. Actinobacteria/ Proteobacteria/ Fungi
,E. Proteobacteria/ Firmicutes / Protozoa
E - CORRECT ANSWER✔✔Which is/are characteristic of members of the Pseudomonas spp.?
A. respiratory metabolism, usually use molecular oxygen as terminal electron acceptor.
B. fluorescent soluble pigments released into media
C. Entner-Doudoroff glycolytic pathway
D. gram-negative, non-spore formers with polar flagella
E. All of the above
A - CORRECT ANSWER✔✔What term describes bacteria that can use 1-C organic molecules as a carbon
source?
A. Methylotroph
B. Methanogen
C. Diazotroph
D. Autotroph
E. auxotroph
E - CORRECT ANSWER✔✔Known and laboratory culturable members of Domain Archaea
A. all have prokaryotic cells.
B. are often obligate anaerobes.
C. are rare, relative to members of Domains Eukarya and Bacteria.
D. are often thermophiles and acidophiles.
E. are all of the above.
E - CORRECT ANSWER✔✔Serratia marcesans:
A. red pigment prodigiosin
, B. used by U.S. military to assess aerial dispersion of bioterrorism agent
C. Phylum Proteobacteria, Class Gammaprotoeobacteria
D. microbiology teaching laboratory demonstrating epidemics
E. all of the above
E - CORRECT ANSWER✔✔Bradyrhizobium japonicum
A. forms a nitrogen-fixing symbiosis with soybeans.
B. may grow chemolithotrophically as well as heterotrophically.
C. is a slow-growing member of Rhizobiaceae.
D. synthesizes the heme component of a leghemoglobin.
E. does all of the above.
E - CORRECT ANSWER✔✔Members of the genus Clostridium
A. may produce exotoxins as a primary virulence factor.
B. produce terminal bulging endospores that make cells look like squash (tennis) racquets.
C. are in Phylum Firmicutes.
D. are obligate anaerobic gram positive rods.
E. are all of the above
E - CORRECT ANSWER✔✔The moles-percent base composition of a DNA molecule may be estimated by
A. quantification of any one of the four bases.
B. determining Tm (melting temperature) for the DNA.
C. measuring the length of the DNA by electron microscopy.
D. asking a taxi driver.
E. all except D.
Exams Super Offer!!!
E - CORRECT ANSWER✔✔Microorganisms that "mineralize" organic compounds (select the essence of
mineralization, not from Wikipedia)
A. render them less toxic.
B. degrade them to minerals such as the salts of calcium, magnesium and potassium.
C. reduce them to methane.
D. render them water-soluble.
E. oxidize them to CO2.
A - CORRECT ANSWER✔✔Which of the below is notorious in Florida and elsewhere as the cause of
necrotic skin- and flesh-lesions?
A. Vibrio vulnificus
B. V. badassificus
C. V. fischeri
D. V. cholerae
E. V. parahemolyticus
B - CORRECT ANSWER✔✔Which causes a true "food poisoning," i.e., elaborates a toxin outside of the
host body in contrast to infecting the host gut and causing a gastroenteritis, though often mediated by
toxins.
A. Clostridium botulinum
,B. Staphylococcus aureus
C. A and B
D. Salmonella typhi
E. Vibrio cholerae
D - CORRECT ANSWER✔✔What term describes microbially mediated anaerobic oxidation of ammonia?
A. methanogenesis
B. diazotrophy
C. anamox
D. nitrification
E. autotrophy
A - CORRECT ANSWER✔✔A vaccine that protects against diphtheria, pertussis and tetanus (DPT)
addresses etiological agents with which of the respective gram reactions.
A. +/-/+
B. -/-/+
C. +/+/-
D. -/+/-
E. +/+/+
B - CORRECT ANSWER✔✔The above referenced DPT vaccine protects against bacterial diseases, the
etiological agents of which are currently assigned to which respective bacterial phyla (Phylum level)?
A. Actinobacteria/ Firmicutes/ Proteobacteria
B. Actinobacteria/ Proteobacteria/ Firmicutes
C. Actinobacteria/ Firmicutes/ Archaea
D. Actinobacteria/ Proteobacteria/ Fungi
,E. Proteobacteria/ Firmicutes / Protozoa
E - CORRECT ANSWER✔✔Which is/are characteristic of members of the Pseudomonas spp.?
A. respiratory metabolism, usually use molecular oxygen as terminal electron acceptor.
B. fluorescent soluble pigments released into media
C. Entner-Doudoroff glycolytic pathway
D. gram-negative, non-spore formers with polar flagella
E. All of the above
A - CORRECT ANSWER✔✔What term describes bacteria that can use 1-C organic molecules as a carbon
source?
A. Methylotroph
B. Methanogen
C. Diazotroph
D. Autotroph
E. auxotroph
E - CORRECT ANSWER✔✔Known and laboratory culturable members of Domain Archaea
A. all have prokaryotic cells.
B. are often obligate anaerobes.
C. are rare, relative to members of Domains Eukarya and Bacteria.
D. are often thermophiles and acidophiles.
E. are all of the above.
E - CORRECT ANSWER✔✔Serratia marcesans:
A. red pigment prodigiosin
, B. used by U.S. military to assess aerial dispersion of bioterrorism agent
C. Phylum Proteobacteria, Class Gammaprotoeobacteria
D. microbiology teaching laboratory demonstrating epidemics
E. all of the above
E - CORRECT ANSWER✔✔Bradyrhizobium japonicum
A. forms a nitrogen-fixing symbiosis with soybeans.
B. may grow chemolithotrophically as well as heterotrophically.
C. is a slow-growing member of Rhizobiaceae.
D. synthesizes the heme component of a leghemoglobin.
E. does all of the above.
E - CORRECT ANSWER✔✔Members of the genus Clostridium
A. may produce exotoxins as a primary virulence factor.
B. produce terminal bulging endospores that make cells look like squash (tennis) racquets.
C. are in Phylum Firmicutes.
D. are obligate anaerobic gram positive rods.
E. are all of the above
E - CORRECT ANSWER✔✔The moles-percent base composition of a DNA molecule may be estimated by
A. quantification of any one of the four bases.
B. determining Tm (melting temperature) for the DNA.
C. measuring the length of the DNA by electron microscopy.
D. asking a taxi driver.
E. all except D.
