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26 Cards in this Set
- Front
- Back
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PSYCHROPHILES |
thrive in cold temps |
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MESOPHILES |
thrive in moderate temps |
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THERMOPHILES |
thrive in hot temps |
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HYPERTONIC SOLUTION |
cellular water passes through the plasma membrane to the high solute concentration |
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HYPOTONIC SOLUTION |
water enters the cell; microbes with a weak cell wall are subject to lysis |
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PHOTOTROPH |
"light feeder" |
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CHEMOTROPH |
"chemical feeder" |
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AUTOTROPH |
"self-feeder" |
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LITHOTROPH |
"rock feeder" |
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HETEROPTROPH/ORGANOTROPH |
"different feeder" |
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NITROGEN |
used by microorganisms to form the amino acids of proteins |
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TRACE ELEMENTS |
iron copper zinc molybdenum |
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AEROBES |
require oxygen |
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ANAEROBES |
do not require oxygen |
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OBLIGATE AEROBES |
require oxygen to synthesize the nutrients needed to live |
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FACULTATIVE ANAEROBES |
can grow without oxygen |
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OBLIGATE ANAEROBES |
bacteria that cannot use oxygen and is harmed by its presence |
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AEROTOLERANT ANAEROBES |
grow without oxygen but not killed |
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HYDROGEN PEROXIDE |
toxic to microbes developed enzymes to neutralize it |
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MICROBIAL GROWTH |
16 cells in 1 hour is 2^4 |
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LAG PHASE |
period of little of no cell division |
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LOG PHASE |
cells begin to divide |
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STATIONARY PHASE |
growth rate slows # of microbial deaths=# of new cells produced |
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DEATH PHASE |
# of deaths exceed # of new cells |
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PLATE COUNT |
most frequent method of measuring bacterial population |
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DIRECT COUNT |
volume of bacterial suspension is placed within a defined area on a microscopic slide |
