Bio 2010 - Microbiology » Summer 2022 » Chapter 6 Quiz

Need help with your exam preparation?

Existing Quiz Clients Login here
Question #1
Organisms which obtain their energy from chemicals are designated as:
A.   organotrophs
B.   autotrophs
C.   chemotrophs
D.   prototrophs
Question #2
An organism has an optimal growth rate when the hydrogen ion concentration is very high. This organism is:
A.   halophile
B.   acidophile
C.   osmotolerant
D.   barophile
Question #3
Starvation proteins are produced by a culture during which of the following segments of the growth curve?
A.   Lag phase
B.   Stationary phase
C.   Decline/death phase
D.   Exponential phase
Question #4
A culture broth tube was very turbid at the surface but clear throughout the rest of the tube indicating that the
A.   organism are aerobes
B.   organism is an obligate anaerobe.
C.   organism should be grown in an anaerobic chamber
D.   organism is killed by oxygen
Question #5
Generation time is:
A.   time required for the population to double
B.   the same for all microorganisms
C.   time required for the initial adjustment
D.   the amount of time needed for the cell to get larger
Question #6
Which of the following is the suitable temperature range for mesophiles?
A.   >40°C
B.   None of these
C.   25-40°C
D.   20-30°C
Question #7
Exponential phase of growth curve of bacteria is of limited duration because of:
A.   accumulation of toxic metabolites
B.   rise in cell density
C.   all of these
D.   exhaustion of nutrient
Question #8
In the exponential phase, the cells and cell mass:
A.   double at a constant rate
B.   first increases then decreases
C.   decreases
D.   are constant
Question #9
Bacteria have been found in all of Earth's ecosystems. What term would generally refer to those found in the hottest locations on Earth (like the water geysers in Yellow Stone National Park)?
A.   mesophiles
B.   psychrophiles
C.   thermophiles
D.   hyperthermophiles

Need help with your exam preparation?

Existing Quiz Clients Login here