Microbiology UTA 2460 - Lab Practical 2
Exam 2026 Questions and Answers
What is the role of resazurin in fluid thioglycolate medium... - Answer -Resazurin
indicates the presence of oxygen in the media
A bacterial isolate is subcultured to two blood agar plates, one of which is
incubated in an anaerobe jar, and the other is incubated on a shelf in the incubator.
After incubation, growth is observed on the plate from the anaerobe jar, but there is
not growth on the plate incubated on the incubator shelf. Based on these results
how would this organism be categorized... - Answer -obligate anaerobe
Where would you predict an facultative anaerobe would grow in a tube of fluid
thioglycolate medium... - Answer -throughout the tube
The pink color in the top of the broth in an FTM tube indicates... - Answer -the
presence of oxygen
Both human pathogens and normal microbiota are typically classified as... -
Answer -mesophiles
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, Taq polymersae is a DNA polymerase enzyme that demonstrates maximal activity
at 72C. The organism from which this enzyme was isolated would most likely be
classified as a... - Answer -thermophile
Vibrio cholerae is the bacterium responsible for cholera, a GI tract infection.
Normally, it takes the ingestion of over one million bacterial cells to cause
infection, but the consumption of antacids significantly lowers this number. What
does this tell you about the likely classification of V. cholerae in terms of pH
preference... - Answer -it is likely an alkaliphile
How does pH negatively affect the metabolism of microorganisms... - Answer -pH
changes can denature enzymes
Why can jams and honey be stored at room temperature for long periods of time...
- Answer -the high sugar content causes plasmolysis of bacterial cells
Microorganisms that can grow at salt concentrations as high as 15-30% are known
as... - Answer -halophiles
An experiment involves the inoculation bacteria onto a variety of media with NaCl
concentrations ranging from 1% to 25%. Which of these media is most likely to be
isotonic with the bacterial cells... - Answer -1%
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
Exam 2026 Questions and Answers
What is the role of resazurin in fluid thioglycolate medium... - Answer -Resazurin
indicates the presence of oxygen in the media
A bacterial isolate is subcultured to two blood agar plates, one of which is
incubated in an anaerobe jar, and the other is incubated on a shelf in the incubator.
After incubation, growth is observed on the plate from the anaerobe jar, but there is
not growth on the plate incubated on the incubator shelf. Based on these results
how would this organism be categorized... - Answer -obligate anaerobe
Where would you predict an facultative anaerobe would grow in a tube of fluid
thioglycolate medium... - Answer -throughout the tube
The pink color in the top of the broth in an FTM tube indicates... - Answer -the
presence of oxygen
Both human pathogens and normal microbiota are typically classified as... -
Answer -mesophiles
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
, Taq polymersae is a DNA polymerase enzyme that demonstrates maximal activity
at 72C. The organism from which this enzyme was isolated would most likely be
classified as a... - Answer -thermophile
Vibrio cholerae is the bacterium responsible for cholera, a GI tract infection.
Normally, it takes the ingestion of over one million bacterial cells to cause
infection, but the consumption of antacids significantly lowers this number. What
does this tell you about the likely classification of V. cholerae in terms of pH
preference... - Answer -it is likely an alkaliphile
How does pH negatively affect the metabolism of microorganisms... - Answer -pH
changes can denature enzymes
Why can jams and honey be stored at room temperature for long periods of time...
- Answer -the high sugar content causes plasmolysis of bacterial cells
Microorganisms that can grow at salt concentrations as high as 15-30% are known
as... - Answer -halophiles
An experiment involves the inoculation bacteria onto a variety of media with NaCl
concentrations ranging from 1% to 25%. Which of these media is most likely to be
isotonic with the bacterial cells... - Answer -1%
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
