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30 Cards in this Set
- Front
- Back
Bacteria grow via
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Binary Fission
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Inward pinching of the cell membrane and cell wall to separate cell into two identical cells
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Cytokinesis
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Bacteria produce Asexually or Sexually?
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Asexually
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A shorter doubling time means a ________ incubation time
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Shorter
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Before cell division begins, metabolic processes occurring
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Lag phase
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Exponential growth phase, more susceptible to antibiotics, symptoms develop
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Log phase
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Death rate becomes equal to reproduction rate
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Stationary phase
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Waste products outpace growth, rapid die-off
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Decline phase
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Highly resistant survival structures formed by species of Bacillus and Clostridium
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Endospores
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Nutrients must be dissolved in ______, which makes up 70-90% of the cell
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Water
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Feed on light energy
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Phototrophs
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Feed on inorganic or organic compounds
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Chemotrophs
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Feed on CO2
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Autotrophs
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Feed on organic carbon sources
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Heterotrophs
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Process a biosynthesis of polysachharides, lipids, amino acids, proteins, purines & pyramidines
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Chemoheterotrophs
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Thrive in Human range temperatures, 10 to 48C
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Mesophiles
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Thrive in -10 to 20C range
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Psychrophiles
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Thrive in 40 to 75C
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Thermophiles
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Thrive in 65 to 110C
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Hyper Thermophiles
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Most cells grow at a pH level of ____
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7
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Prokaryotes tolerant of pH in the lower ranges (0-6). Used in yogurt, cheese and other dairy production
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Acidophiles
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Organisms that require oxygen to survive
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Obligate Aerobes
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Organisms that prefer a lower O2 level than normal air
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Microaerophiles
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Organisms that do not or cannot process air
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Anaerobes
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Organisms that are not effected by the presence of O2
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Aerotolerant
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Organisms to which O2 is toxic
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Obligate anaerobes
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Organisms that need both low O2 and high CO2
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Capnophilic
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Organisms that can tolerate exceedingly high hydrostatic pressures
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Barophiles
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Salt-tolerant prokaryotes
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Halophiles
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Organisms that require high osmotic pressures regardless of content
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Osmophiles
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