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6. What is added to a selective media?
- an inhibitory substance or an indicator
- substances like blood, serum, egg
- Nutrients
7. What is the disadvantage of liquid cultures?
- Only motile bacteria can reproduce
- Does not provide a pure culture from mixed innocula
- Kills off bacteria
8. What is added to an enriched medium?
- substances like blood, serum, egg
- Nutrients
- Complex polysaccharides
9. What does a complex media do?
- include blood, egg or serum
- provide special nutrients
- provide special temperatures
10. Which of these is a use of lawn culture?
- preparing antibodies
- Bacteriophage typing
- pregnancy test
11. What media is used in stab culturing?
- blood agar
- gelatin or glucose
- Agar
12. Which types of bacteria grow in temperatures above 45 degrees?
- Thermophiles
- psychrophiles
- mesophiles
13. What is water activity?
- The intensity at which water disssociates with various non-aqueous molecules
- The intensity at which water associates with various non-aqueous molecules
- The intensity at which water associates with various aqueous molecules
14. What is a special media based on?
- Oxygen requirement
- Nutrient requirement
- temperature requirement
15. Which bacteria retain the crystal violet dye in the gram staining protocol?
- Gram + and -
- Gram +
- Gram -