Microbial Growth Flashcards
An increase in the number of cells in a population
Microbial Growth
The range of conditions within which an organism can grow; Principle of limiting factors
Ecological Amplitude
What are the 5 categories of temperature requirements for microorganisms to grow in?
Psychrophiles, Mesophiles, Thermophiles, Extreme Thermophiles, Hyperthermophiles
Which ecological group is cold-loving, grows best at 15-20 degrees C; they are capable of growth at 0 degrees C.
Psychrophiles
This ecological group grows at exactly 4 degrees C
Psychrotrophs
This ecological group of organisms grow best between 25-40 degrees C; Includes most human pathogens that grow best at 37 degrees C (human body temperature)
Mesophiles
This ecological group grows best between 45-60 degrees C; Some can grow at 90 degrees; Heat Loving; Can be found in compost piles and habitats directly under the sun
Thermophiles
This ecological group grows best in temperatures around 80- 121 degrees C
Extreme Thermophiles
This ecological group can grow over the boiling point
Hyperthermophiles
Most bacteria grow between which pH levels
6.5 and 7.5 because strong acids and bases can be highly damaging to enzymes and other cellular substances
This microbe lives in habitats with a high solute concentration of salt
Osmophiles
This osmophile prefers high concentrations of salt
Extreme Halophiles
This microbe is remarkably resistant to salt, even though they don’t live in high salt areas.
Facultative Halophiles
This bacteria gets energy from inorganic molecules and carbon from CO2
Chemoautotrophs
This type of bacteria gets energy from sun and carbon from CO2
Phototrophs