Quiz 7 Flashcards
1
Q
What happens when a culture is incubated above the organisms maximum temperature for growth?
A
The cell membranes collapse, proteins denature, and the cell usually dies.
2
Q
The speed up the growth rate in a chemostat, the ___ should be increased. To increase the cell yield as well, ___ should be increased.
A
Dilution rate / limiting nutrient
3
Q
Which of those listed below is NOT classified as a cardinal temperature?
A
Lethal temperature
4
Q
Why are the pour-plate and spread-plate techniques to enumerate cells OFTEN favored over traditional microscopy cell counting in today’s microbiology laboratories?
A
only viable cells are counted
5
Q
Maintaining a constant cell population in a chemostat requires the monitoring and control of:
A
All answers are correct
- the dilution rate of volume pumped in
- nutrient concentrations
- the populations by-products
