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23 Cards in this Set
- Front
- Back
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The growth of microbes take place on two levels-1. ? , 2.?
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1.cells synthesize new cell components and increase in size
2. The number of cells in the population increases |
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The division of bacterial cells occurs mainly through ?
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binary fission
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When cells divide and get bigger they need ? for protein synthesis and they also need the proteins because they will be used as ?
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ribosomes
enzymes |
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The time it takes for one cell to divide is the ? time or the ? time
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generation
doubling |
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Each new fission cycle or generation increases the population by a factor of ?
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2
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As long as the environment is favorable, the doubling effect continues at a ? rate. This growth pattern is termed ?
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constant
exponential |
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A bacterial population displays a predictable pattern of growth called a ? curve
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growth
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The ? phase is a relatively flat period, in which newly inoculated cells require a period of adjustment, enlargement and synthesis
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lag
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Cells reach the maximum rate of cell division during the ?/? growth phase
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exponential/log
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When a cell population enters a survival mode in which cells stop growing or grow slowly and death of cells balances out the rate of multiplication it is the ? growth phase
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stationary
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The ? phase is when cells begin to die at an exponential rate
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death
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Turbidometry uses a ?-meter to determine turbidity in a broth medium
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spectrophotometer
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Enumeration/counting of bacteria uses a special microscope slide called a ?
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cytometer
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The problem with counting cells is that it is hard to tell if they are ? or ?
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dead or alive
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The method for counting cells that electronically scans a culture as it passes through a tiny pipette is the ? counter
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coulter
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The ? cytometer counts cells and measures cell size and differentiates between live and dead cells
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flow
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Real time ? allows scientists to quantify bacteria and other microorganisms that are present in environmental or tissue samples without isolating or culturing them
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PCR-Polymerase chain reaction
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Microbial cultures in a nutrient limited batch environment exhibit four distinct stages of growth and they are ?
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LESD- lag phase
exponential/log phase stationary phase death phase |
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Cell population growth can be quantified by measuring ?, ?-counts, and ? -counts
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turbidity
colony cell |
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Photoautotroph's : energy source =?
carbon source =? |
sunlight
C02 |
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Chemoautotroph's : energy source=?
carbon source =? |
simple organic chemicals
CO2 |
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Photoheterotroph's: energy source=?
carbon source=? |
sunlight
organic |
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Chemoheterotroph's: energy source=?
carbon source=? |
Metabolic conversion of nutrients from other organisms
organic |
