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36 Cards in this Set
- Front
- Back
- 3rd side (hint)
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trace elements
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other small amounts of minerals required for microbial growth
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aerobes
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use O2
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anaerobes
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dont use O2
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obligate aerobes
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require O2 to live
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facultative anaerobes
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developed the ability to grow without O2
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Obligate anaerobes
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unable to use O2
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superoxide dismutase
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enzyme that destroys superoxide free radicals
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aerotolerant anaerobes
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cannot use O2 for growth but can tolerate it
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microaerophiles
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aerobic but do not require O2
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culture medium
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nutrient material prepared for the growth of microorganisms in a lab
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inoculum
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when microbes introduced to culture medium
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culture
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microbes that grow in culture medium
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sterile
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contains no living organisms
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agar
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what they use to grow microorganisms in culture medium
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chemically defined medium
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exact chemical composisiton in known
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capnophiles
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microbes that grow better at high CO2 concentrations
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enrichment culture
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grow a particular microbe
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binary fission
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Prokaryotic cell reproduce 2 daughter cells
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budding
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small initial outgrowth
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generation time
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time require for a cell to divide
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serial dilution
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diluted original inoculum
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filtration
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microorganisms are filtered out to count them
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psychrophiles
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cold loving microbes
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mesophiles
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moderate temp. loving microbes
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aqua
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water
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aquarium
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psychotrophs
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spoilage microorganisms
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acidophiles
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tolerant of acidity
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plasmolysis
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loss of water causes cell's cytoplasm to shrink
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halophiles
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can tolerate high salt concentration
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four elements required for large microbial growth
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carbon, nitrogen, sulfar, and phosphorus
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in hypertonic solutions most microbes undergo
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plasmolysis
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lag phase
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little or no change in the number of cells but metabolic activity is high
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log phase
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bacteria multiply at fastest rate
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stationary phase
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equal between cell division and death
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death phase
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most deaths occur
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spectrophotometer
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used to determine tubidity by measuring the amount of light that passes through a suspension of cells
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