Download Review_L9_Variations in PS

Review Questions - L9: Variations in Photosynthesis
Questions:
1. What is transpiration?
2. Why is transpiration useful for a plant?
3. What are the drawbacks of transpiration?
4. What is the function of stomata?
5. Describe the types of environment you would find a C3, C4 and CAM plant in.
6. What is photorespiration and why is it a problem for plants?
7. Why is rubiso the most abundant enzyme on the planet?
8. How is a C4 plant different from a C3 plant?
9. Make a diagram that shows the C4 pathway in a C4 plant. Be sure to include CO2, PEP, PEP
carboxylase, oxaloacetate, malate, pyruvate and ATP, and also include in what types of cells these
steps are occurring.
10. What is the main difference between rubisco and PEP carboxylase?
11. Where does cyclic electron flow occur in a C4 plant and what is its function?
12. Where in the chloroplast are Photosystem 2s typically found? PS 1s?
13. Besides the 4-carbon product, what else must travel between the mesophyll cell and bundle sheath
cell in a C4 plant?
14. How is a CAM plant different from a C4 plant?
15. Make a diagram of the C4 pathway in a CAM plant. Be sure to include CO2, PEP, PEP carboxylase,
oxaloacetate, malate, malic acid, pyruvate, central vacuole and ATP, , and also include where and
when these steps are occurring.
16. Under what circumstances would a C3 plant be more successful than a C4 or CAM plant? Under
what circumstances would a C4 or CAM plant be more successful that a C3 plant?