Download Chap 10 Study Qs Part 4

Chapter 10 Study ?’s (part 4): Mechanisms of C-Fixation
8a) What is meant by transpiration?
8b) What do most plants do on hot, dry days?
Why? What is the “tradeoff” of doing this?
9a) Describe the process of photorespiration. Compare photorespiration to normal cellular respiration and to
photosynthesis.
9b) What is one hypothesis that photorespiration is a “leftover” of evolution?
10a) Explain the significance of the name: C4 plants.
10b) Explain the role of bundle-sheath cells and mesophyll cells in C4 photosynthesis. Include in your
explanation the location or arrangement of these cells in a leaf.
10c) How is the enzyme PEP carboxylase better suited to hot, dry climates than the enzyme rubisco?
11) How are CAM plants adapted to performing photosynthesis in hot climates?
12) Describe how C4 and CAM plants are similar and how they are different.
13) How much carbohydrate is estimated to be produced each year by photosynthesis?
Critical Thinking Question:
14) How can the rate of photosynthesis be measured? (3 things)