Definitions
Growth Requirements
Bacterial Growth
More Metabolism
Grab Bag
100
Organisms that grow in acidic environments are known as
Acidophiles
100
What chemical requirement is the structural backbone of living matter
Carbon
100
In photosynthesis what compound absorbs light and releases an electron
Chlorophyll
100
What enzyme is capable of joining two compounds
Ligase
200
The mechanism by which bacteria replicate
Binary Fission
200
Which form of toxic oxygen in neutralized by catalase or peroxidase
Hydrogen peroxide
200
What is considered a countable plate when performing a plate count?
25/30 - 250/300
200
Biosynthesis of what compounds requires amination or transamination
Amino acids
200
Name one cellular component that feedback inhibition regulates the production of
Amino acids, Vitamins, Purines and pyrimidines
300
When a cell is surrounded by a higher concentration of solute it losses water and shrinks, this is known as
Plasmolysis
300
What is the optimum temperature for a mesophile?
35-37 degree C
300
List one technique that indirectly measures bacterial numbers
Turbidity Metabolic activity Dry Weight
300
What specific type of fermentation is used to make yogurt, sauerkraut and pickles
Lactic acid fermentation
300
A facultative halophile can tolerate up to what percentage of salt
2%
400
The machine used to measure the turbidity of a culture is known as
Spectrophotometer
400
Where do cells obtain nitrogen from?
Ammonium or nitrate
400
What is the generation time for most bacteria
1-3 hr
400
When a pathway can be used for both catabolism and anabolism it is known as
Amphibolic
400
Which electron transport chain carrier molecule carries only electrons
Cytochromes
500
The time it takes for a population of organisms to double in number
Generation time
500
Name two trace elements required for growth of organisms
Iron, Copper, Zinc, Molybdenum
500
Draw a bacterial growth curve labeling each part
Lag Log Stationary Death
500
Where does the starting material for purine and pyrimidine come from
5 carbon sugars - Pentose phosphate pathway or the Entner Doudoroff pathway Amino acids - Glycolysis or Kreb's cycle
500
What technique for the direct measurement of microbial growth is most commonly used to quantify coliforms
Filtration
M
e
n
u