FINAL EXAM MB 495C/D - Microbial Diversity - Fall 1995

1. What are the three primary evolutionary branches of life? (5 points)

2. What are the three phenotypic groups of Archaea? (5 points)

3. What is the leading theory on the origin of viruses? (5 points)

4. All methanogens can make methane from _______ and _______. (5 points)

5. What was (if it ever existed) 'the RNA world'? (5 points)

6. How is the metabolism of Archaeoglobus related to it's methanogenic ancestry? (5 points)

7. Describe the phenotype, habitat, and metabolism of any particular Archaeal specie or group you find interesting. (10 points)

8. Describe the phenotype, habitat, and metabolism of any particular unicellular Eukaryal specie or group you find interesting. (10 points)

9. Why are fatty acids toxic to acidophiles (e.g. Sulfolobus)? (10 points)

10. What are some of the main problems with the Oparin Ocean ('Primordial Soup') hypothesis of the origin of life? How does the Wäctershäuser theory overcome these problems? (10 points)

11. Until very recently, no Corarchaeal species had been cultivated or even identified - how then was their existance known in advance? (10 points)

12. How do the properties of Archaeal RNA polymerases compare to those of Bacteria and Eukarya? (10 points)

13. As you can see from the tree (next page), no primative Eukarya have yet been identified. What biochemical , phenotypic, and metabolic properties would you predict a primative Eukarya to have? What kind of environments or environmental conditions would you look for them in? (10 points).