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24 Cards in this Set
- Front
- Back
photosynthesis
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the conversion of light energy into chemical energy.
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autotroph
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-"producers" of the environment
-plants: photoautotrophs -produce their own organic material |
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heterotrophs
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-make their organic material by consuming organic material.
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chloroplast
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-site of photosynthesis
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mesophyll
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the fleshy part of a leaf where there is the highest concentration of chloroplast
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stomata
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pores in a leaf used for gas exchange
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photosynthesis reaction
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6CO2 + 6H2O + Light energy = C6H12O6 + 6O2
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2 stages of photosynthesis
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-light reactions in the thylakoid membrane
-calvin cycle |
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products of photosynthesis
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-O2
-sugar |
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chloroplast pigments
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-clustered in the thylakoid membrane
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Chlorophyll A
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-absorbs blue-violet and red light
-reflects green-yellow -Participates directly in light reactions. |
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Chlorophyll B
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- absorbs blue and orange light
-reflects green-yellow -Transfers all energy to A |
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Carotenoids
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-reflect orange and yellow
-disperses excess energy -energy provider for A |
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photosystem
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-light harvesting unit in the thylakoid membrane
-two different systems II, then I |
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reaction center
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-chlorophyll A that accepts all energy and splits water in the photosystem
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Photophosphorylation
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-electron transport chain
-proton pump into ATP synthase -products: ATP, NADPH |
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Calvin cycle
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-anabolic pathway
-3CO2 + 3RuBP = 6PGA -6PGA + 6ATP + 6NADPH = 6G3P -5G3P + 3ATP = 3RuBP |
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anabolic pathway
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-uses energy to make molecules
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products and energy required of anabolic pathway
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-products: 1 G3P, 6NADP+, 6H+, 9ADP
-energy required: 9ATP, 6NADPH, 3CO2 |
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C3 plants
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-take in CO2 directly from atmosphere
-rubisco fixes the CO2 |
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C4 plants
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-sugarcane, grass, corn
-2 types of photosynthetic cells: mesophyll, bundle sheath -PEP carboxylase: carbon fixation |
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Mesophyll cell
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-fixation of CO2
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Bundle sheath cells
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-calvin cycle
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CAM plants
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-water storing succulents
-stomata open at night and closed durring the day -PEP carboxylase: carbon fixation |