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6. What does Syntrophy mean?
- Mixed culture of anerobes growing in close association (hydrogen transfer)
- Mixed culture of aerobes growing in close association (hydrogen transfer)
7. One problem with using Phenotypes is convergence? What does this mean?
- Phenotypes may be similar because of similar environments not evolution
- Very different pathways for same growth
- Gradual changes in DNA
8. Why is Salt Agar used as a selective media for S.aureus?
- It kills all the S.aureus
- It kills all other bacteria apart from S.aureus
- It increases pH so enzymes work better
9. Which of these is a physical barrier?
10. Which of these steps requires O2 during fermentation of sugars?
- Link Reaction
- Krebs Cycle (pyruvate-->CO2 and H2O)
- Glycolysis (glucose-->pyruvate)
11. Cocci are bacteria that divide in a single plane. Which bacteria originates on the skin?
- Staphylocci Endodermis
- Streptococcus Pnemoniae
- Staphylococcus aureus
12. Which of these is not a function of Pilli?
- Adhesion
- Bat away mucus
- exchange of DNA
13. Enterotoxin is?
- Effect upon gastrointestinal system
- Effect on nervous system
14. What do bacteria need for metabolism?
- Source of Carbon
- Nutrients
- Oxygen
15. Chromosomes removed from our strain, mix radiolabled, heat, reaneal. If 70% same species. What is this describing?
- Hybridisation
- PCF
- Agglutination
16. What phase is shown by a steep inclin?
- Lag Phase
- Exponential Phase
- Stationary Phase
- Death Phase
17. Which bacteria release endotoxins?
- Gram Negaitve
- Gram Negative and Gram Positve
- Gram Postive
18. Bacilli can be both gram + and gram - but what is another word for Bacilli?
19. What do Collagenase enzymes do?
- Hydrolyse collagen in connective tissues
- Hydrolyse hyaluronic acid
- Break down fibrin in blood clots
20. Commensalism
- Where one pair of organisms benefits and the other is unaffected
- Interdependent both benefiting
- Exploit human body
