PhotosynthesisPhotosynthesisPhotosynthesisPhotosynthesis.

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Presentation transcript:

PhotosynthesisPhotosynthesisPhotosynthesisPhotosynthesis

Calvin Cycle (C 3 Pathway) 6ATP + 6NADPH + 3 RuBP + 3 CO 2  6 G3P 1 G3P Ready for cell use 5 G3P3 ATP +

Calvin Cycle

6 NADPH 3 ATP 6 – G3P 3C 5 – G3P 6 ATP 5C 3 – RuBP (Ribulose Bisphophate) 1C 3 – CO 2 3C 6 - PGA Calvin Cycle 1 – G3P 5C 3 – RuBP C 3 Pathway Rubisco

6 NADPH 3 ATP 6 – G3P 3C 5 – G3P 6 ATP 5C 3 – RuBP 1C 3 – CO 2 3C 6 - PGA Calvin Cycle 2 – G3P 5C 3 – RuBP C 3 Pathway Rubisco 3C 1 – G3P

Photorespiration In arid conditions… stomata close O 2 builds up CO 2 is depleted Rubisco links RuBP to O 2 No carbon fixation No sugars

ATP O2O2O2O2 CalvinCycle Vascular Tissue C 4 Pathway – PR Solution 1 CO 2 fixing enzyme has minimal O 2 affinity 4-C molecule forms (C 4 Pathway) Spatial separation of Calvin cycle (rubisco) and O 2 CO 2 3C 3C Sugar 4CMesophyllCellBundleSheathCell Rubisco works here

Temporal separation of carbon fixation & Calvin cycle Stomata open at night to collect CO 2 (minimal evap.) Fixed CO 2 kept until ATP & NADPH available during day CAM Pathway – PR Solution 2

Photosynthesis Review Light RxnsC FixationCalvin Cycle C 3 Plants C 4 Plants CAM Plants Mesophyll Bundle Sheath Cell Mesophyll

Photosynthesis Review What is the disadvantage of open stomata?

Photosynthesis Review What color of visible light carries the most energy?

Photosynthesis Review Put the following in the order an e - may pass through: Photosystem I, G3P, ETC, NADPH, photosystem II, water

Photosynthesis Review Location in the cell of the Calvin Cycle of C 3 plants

Photosynthesis Review TWO things that can happen to the primary product of ps?

Photosynthesis Review Location of Calvin Cycle in C 4 plants

Photosynthesis Review Put the following in order of size: RuBP, G3P, Starch, Glucose, Sucrose

Photosynthesis Review Englemann’s experiment determined the effect of _______ on the rate of photosynthesis.

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