PRELIM 02 - Microbial Growth and its Control Flashcards
__________ increase in number not size
Microbial growth
Time required for a cell to divide and its population to double
Generation time
Temperature (Type of requirement for microbial growth)
Physical
pH (Type of requirement for microbial growth)
Physical
Osmotic pressure (Type of requirement for microbial growth)
Physical
Carbon (Type of requirement for microbial growth)
Chemical
Nitrogen, Sulfur, Phosphorus (Type of requirement for microbial growth)
Chemical
Trace elements (Type of requirement for microbial growth)
Chemical
Oxygen (Type of requirement for microbial growth)
Chemical
Organic growth factors (Type of requirement for microbial growth)
Chemical
pH of most bacteria
6.5-7.5
pH of acidophiles
1
pH of fungi
5-6
Organisms that can grow at high salt concentrations
Extreme halophiles
High osmotic pressure (hypertonic) results to __________
Plasmolysis (shrinkage)
Low osmotic pressure (hypotonic) results to __________
Swelling
The structural backbone of living matter; it is half the dry weight of bacterial cell
Carbon
2 types of carbon sources
Chemoheterotrophs, Chemoautotrophs & photoautotrophs
A type of carbon source that get carbon from organism materials such as proteins, carbohydrates, and lipids
Chemoheterotrophs