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17 Cards in this Set
- Front
- Back
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population growth
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increase in cell numbers
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cellular growth
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increase in individual cell size
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how do prokaryotes grow?
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binary fission
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generation time
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doubling time for a population of cells
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Batch culture
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growing cells in a closed system
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lag phase
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cells adjust to new environment. no increase in the bumber of cells
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exponential phase
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cells grow at an exponential rate
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stationary phase
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slow down in cell growth after exponential phase due to limited nutrients or inhibitory substances
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death phase
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cell viability decreases
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N=N02^n
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N=final cell number
N0=initial cell number n=number of generations or doublings |
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generation time formula
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g=t/n
t=time interval for n n=number of generations |
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growth rate constant
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Nt=mN0
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serial dilution
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way to calculate cell density
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Optical density of a solution
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proxy for growth when monitored vs. time
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Direct counts of cells
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looking at them under a microscope.
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viable counts of cells
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plate bacteria, count the colonies
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indirect counts
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spectrophotometer
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