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7 Cards in this Set

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What is Growth of a popluation
An increase in number of cells.
What are requirements for growth?
Physical and Chemical
Physical requirements:
Enzyme activity depends on the temperature.
Psychorophilic-prefer cold 0--20C
mesophilic -mod. temp 20-40C
thermophilic- heat loving-above 40C
Another Physical requirement
1. Extent of acidity or alkalinity. Referred to as ph of solution.
What is ph of bacteria?
6.5 to 7.5ph
which Eukaryote can tolerate high salt concentration?
Halophiles
Microbial Growth is best when
Osmotic pressure is ideal. Salt concentration of microbial cytoplasm is 1% and external is 1%.