Micro Chapter 6 Question Preview (ID: 62594)
Micro Chapter 6.
TEACHERS: click here for quick copy question ID numbers.
Salts and sugars work to preserve foods by creating a
a) depletion of nutrients.
b) hypotonic environment.
c) hypertonic environment.
d) lower pH.
Most bacteria grow best at pH
a) 1
b) 5
c) 7
d) 14
Which of the following pairs of microbe classification terms and optimal growth temperatures is mismatched?
a) thermophile – growth at 37°C
b) psychrotroph – growth at 20-30°C
c) mesophile – growth at 25-40°C
d) psychrophile – growth at 15°C
During which growth phase will gram-positive bacteria be most susceptible to penicillin?
a) lag phase
b) The culture is equally susceptible during all phases.
c) stationary phase
d) log phase
Which of the following is the best definition of generation time?
a) the time needed for nuclear division
b) the length of time needed for a cell to divide
c) the duration of log phase
d) the length of time needed for lag phase
Which group of microorganisms is most likely to spoil a freshwater trout preserved with salt?
a) psychrophiles
b) facultative halophiles
c) anaerobes
d) thermophiles
Patients with indwelling catheters (long-term tubes inserted into body orifices for drainage, such as through the urethra and into the urinary bladder) are susceptible to infections because
a) biofilms develop on catheters.
b) injected solutions are contaminated.
c) their immune systems are weakened.
d) all bacteria cause infections.
An isolated colony on a streak plate contains millions (or even billions) of identical cells all arising from one initial cell.
a) True
b) False
c)
d)
Most pathogenic bacteria are thermophiles.
a) True
b) False
c)
d)
Nitrogen-fixing bacteria, such as cyanobacteria, can use atmospheric nitrogen (N2) for their nitrogen source.
a) True
b) False
c)
d)
The source of nutrient(s) in nutrient agar is
a) peptone and NaCl.
b) agar and NaCl.
c) peptone and beef extract.
d) All of these
Play Games with the Questions above at ReviewGameZone.com
To play games using the questions from above, visit ReviewGameZone.com and enter game ID number: 62594 in the upper right hand corner or click here.
To play games using the questions from above, visit ReviewGameZone.com and enter game ID number: 62594 in the upper right hand corner or click here.
TEACHERS / EDUCATORS
Log In | Sign Up / Register
Log In | Sign Up / Register