Food Safety and HACCP 2
Terms
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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