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15 Cards in this Set

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Binary fission
single cell divides into two identical cells.
Mycelial Growth
Standard Plate Count-Reflects # of Viable microbes & assumes that each bacterium grows into a single colony
Mycelial Growth
Plate count done by either pour or spread plate method
Mycelial Growth
filtration[ bacteria obtained on surface of a membrane filter and then transferred tol a cult. medium to grow and be counted
Mycellial Growth
MPN-most probable number- used for microbes that will grown in liquid medium. It is a statistical estimation.
Mycellial growth
Direct Microscopic Count- Microbes in a measured volume of a bacterial suspension are counted without the use of specially designed slide.
Budding
A sexual reprodujction beginning as a protuberance from the parent cell that grow to become a daughter cell. Release of an eneveloped virus through the plasma membrane of an animal cell.
Growth Rates``
Generation Time-The time required for a cell to divide (and its population to double).
Growth Curve
1. Lag Phase-Little or no change in # of cells, but metabolic activity is high.
growth curve`
2. Log phase-bacteria multiply at the fastest rate possible under the conditions provided.
growth curve
3. stationary phase- equilibrium between cell division and death.
growth curve
4. death phase- the # of deaths exceeds the # of new cells formed.
Enumeration of cell number and culture mass-viable and total counts, turbidity
Turbidity- Monitoring bacterial growth as bacteria multiply in a liq. medium the medium becomes turbid or cloudy with cells. Less light transmitted the more bacteria in the sample.
Metabolic Activity
Measure metabolic activity. acid production is used to determine amts. of vitamins eg; of metabolic test.
Dry Weight
Fungus is removed from the medium, filtered pand placed in weighing bottle, dried . In bacteria removed from centrifugation.