BACTERIAL GROWTH REQUIREMENTS Flashcards
increase in the number of
cells
GROWTH
structural backbone of all organic
molecules
CARBON
utilize inorganic compounds for
their carbon source
AUTOTROPHS
utilize organic compounds such
as glucose serve as the carbon source of
HETEROTROPHS
energy source
- sunlight
- oxidation of inorganic
substances
bacterial cell is made up mostly of
WATER
MOISTURE
for optimal growth
OXYGEN
require oxygen
AEROBES
cannot survive in the presence of oxygen
ANAEROBES
can grow in the presence or absence of oxygen
FACULTATIVE
can grow under low oxygen tension but
their rate of growth is diminished
Microaerophiles
require the addition of carbon dioxide to
enhance their growth
Capnophiles
organisms which grow best at 10-20 C
Psychrophiles
organisms which are able to grow at 20-40 C
Mesophiles
Organisms which grow temperature above 40-
60 C
Thermophiles
organisms which grow best at > 100 C
Hyperthermophiles
organisms that grow at a low pH ( < 6.0 )
Acidophiles
organisms that grow at a neutral pH ( 7.0 – 7.2 )
Neutrophiles
organisms that grow at a at high pH
Alkalophiles
movement of water from low to high
solute concentration
OSMOSIS
organisms that need high osmotic pressure
for maximal growth
Osmophiles
organisms that require salt for growth
Halophiles
prepare for cell division
Lag
active growth
Log
Death = Growth rate
Stationary
nutrients consumed
Death / Decline
