Lab practical study - Bacterial growth + growth classification
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17 Terms
What is A?
Lag
What is B?
Log
What is C?
stationary
What is D?
Death
What happens during Lag?
no increase in number of bacterial cells
What happens during Log?
An exponential increase in number of living bacterial cells
What happens during Stationary?
A plateau in number of living cells, cell division and death is roughly equal
What happens during Death?
Exponential decline in number of living cells
What is a psychrophile?
Cold loving - 0-20 degrees C
What is a mesophile?
middle temperature - 20-45 degrees C
What is a thermophile?
moderate and high temps - 45-60 degrees C
What is an Obligate Thermophile
Only grows at high temperatures - above 60 degrees C
What is an facultative Thermophile
Can grow at moderate temperatures AND high temperatures: 37-60 degrees C
What is a Hyperthermophile?
Extreme heat grows up to 121 degrees C
What is an Acidophile’s optimal pH?
optimal pH <5.5
What is a Neutrophile’s optimal pH?
optimal pH about 7
What is an Alkaliphile’s optimal pH?
optimal pH >8
