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SBI4U1 Metabolic Processes

C4 & CAM: Questions. SBI4U1 Metabolic Processes. Ms. Ponvia. Work on the following questions:. p. 172 # 1, 2, 3, 6, 8. P. 172. A process whereby oxygen is added to RuBP by Rubisco , creating PGA and glycolate  which can then be released as CO 2 Oxygen. P. 172. c) 20%

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SBI4U1 Metabolic Processes

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  1. C4 & CAM: Questions SBI4U1Metabolic Processes Ms. Ponvia

  2. Work on the following questions: p. 172 # 1, 2, 3, 6, 8

  3. P. 172 A process whereby oxygen is added to RuBP by Rubisco, creating PGA and glycolate which can then be released as CO2 Oxygen

  4. P. 172 c) 20% d) Photosynthesis: G3P is produced, while in photorespiration: PGA and glycolate are produced

  5. P. 172

  6. P. 172 CO2 plasmodesmata OAA Mesophyll cells Bundle-sheath cells pyruvate

  7. P. 172 a) Malate is product of carbon fixation – occurs during night time in CAM plants. Thus late at night will find most malate. b) At end of day, when most malate have been converted back to pyruvate.

  8. P. 172 c) Hot, dry, desert environment prohibits opening of stomata during the day as transpiration rate (water loss) will be too high.

  9. P. 172 d) CO2 e) CO2 is incorporated into a 4C organic acids using PEP carboxylase & stored in vacuoles until morning.

  10. P. 172 More organic acids in the CAM plants that have been kept in the dark for 24 hours. (Recall, night time is when CO2 is incorporated into a 4C organic acid by PEP carboxylase.)

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