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6. If the gram stain is negative what can be assumed about the peptidoglycan and outer membrane?
- It is thin
- It is thick
- It is permeable
7. Blood is an example of
- Differential agents
- Culture media
- Selective agents
- Polysaccharide
8. What is the inoculum in culture media?
- Nutrient solution for growing microorganisms
- Initial small number of cells added grown to give a culture
- A culture growing on an agar plate
9. At what temperature does agar melt?
10. What is the approximate WxL of E.coli
- 1500nm x 4000 nm
- 1500nm x 5000nm
- 1300nm x 4000nm
- 1300nm x 5000nm
11. In the bacterial cell wall there are meshlike polymers of identical subunits forming long strands
12. Crystal violet is an example of
- Selective agents
- Complex differential media
- Culture media
- Polysaccharide
13. Which is not a microscopic observation?
- Size and shape
- Age
- Endospores - present or absent
- Motility
- Gram stain
- Arrangement
14. What is peptidoglycan?
- A rigid structure that lies just outside the cell plasma membrane
- A fluid structure that lies inside of the cell
15. Which test looks for the presence of cytochrome c oxidase?
- Oxidase test
- Oxidation test
- Cytochrome c test
16. NaCl is an example of
- Polysaccharide
- Complex differential media
- Selective agents
- Culture media
17. In an oxidase test, negative results show as what colour?
- Colourless
- Cream
- Blue
- Purple
18. Some gram positive bacteria have layer of proteins on surface of peptidoglycan
19. Fermentable carbohydrate plus pH indicator is an example of what?
- Polysaccharide
- Culture media
- Differential agents
- Selective agents
20. Gram negative cell walls have teichoic acids