7. In photosynthetic bacteria, where do the light reactions of photosynthesis take place? Where are the enzymes of the dark reactions located?

8. How do green sulfur bacteria and purple sulfur bacteria differ in the structure of their photosynthetic regions of the cell?

9. What is the biochemical function of ribosomes? How do the ribosomes of bacteria and of eucaryotes differ? Which do mitochondrial ribosomes more nearly resemble?

10. What kinds of eucaryotic cells have cell walls? What is their purpose?

11. How is the DNA of eucaryotic cells packaged or stored?

12. How do some antibiotic molecules assist ions in passage through the cell membrane? Is this an example of active, or passive, transport?

13. What is a sodium pump in cells? Where does it build up an excess of sodium ions? Is this active, or passive, transport?