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15 Cards in this Set

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What is the definition of microbiology?
The study of microscopic organisms.
______ -->The study of the biochemical, physiological and sociological interactions of microorganisms with food
Food microbiology
What are the four classes of microorganims?
Bacteria
Fungi (molds and yeasts)
Protozoa (parasites)
Viruses
Which two of the following four must be grown in a tissue culture to survive?
Bacteria
Fungi
Protozoa
Viruses
The mission of a microorganism is to _____
survive and multiply
Lactic acid bacteria and some molds are helpful or harmful?
helpful!!
Spoilage organisms are those that grow at _____ temps
refrigeration
____ are free living organisms that can be cultivated using lab medio
bacteria
Are bacterica pro or eukaryotes?
Prokaryotes
What are some of the characteristics of prokaryotes?
Cell wall
cell membrane(lipid bilayer)
no nuclear membrance
single, circular DNA
movement-simple flagella
respiration-cell membrane
The growth rate for bacteria is as short as ____
20 minutes
Bacteria require ___ and ___ to grow
food and water
What are the 4 phases of the bacterial growth curve?
1) Lag phase -- the initial adjustment to the environment before the bacteria begins to grow

2) Log Phase- after it gets adjusted, it divides by binary fission

3) Stationary phase

4) Death phase
There are two types of functional classification. What are they
Oxydation-Reduction Potential and Growth Temperature.
An ____ _____ is a bacteria that only grows in the presence of oxygen
Obligate Aerobe