12PhotosynthesisWA09PDF

12PhotosynthesisWA09PDF - Key Concepts Covered on Exam...

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Key Concepts Covered on Exam Photosynthesis Understand what producers provide for consumers Be able to compare and contrast the light collecting reactions with the conversion of carbon dioxide to carbohydrates in the Calvin cycle - with respect to location within the chloroplast, principal role, and starting materials and products for each process Know the source of oxygen produced in photosynthesis and understand the reason why water is split Understand the principle of how ATP is formed in chloroplasts Understand the direction of adjustments in chlorophyll levels and Calvin cycle enzyme levels in response to growth of plants in sun or shade Be able to compare the ecological advantages and disadvantages of C3 versus C4 plants Be able to compare and contrast photosynthesis and respiration with respect to the location of electron transport / ATP synthase versus the carbon cycles, the mechanism of ATP formation, the starting materials and products, the role of oxygen and water, and the role of H (electron and H + ) carriers
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Fig. 1.5 Sunlight Ecosystem Heat Heat Cycling of chemical nutrients Producers (plants and other photosynthetic organisms) Chemical energy Consumers (such as animals) Photosynthesis
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Fig. 9.2 C-H bonds High potential energy Low potential energy Light energy ECOSYSTEM Photosynthesis in chloroplasts CO 2 + H 2 O Cellular respiration in mitochondria Organic molecules + O 2 ATP powers most cellular work Heat energy ATP
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Fig. 2.19
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Mint kept mouse alive, but not in the basement… http://www.americanscientist.org/issues/id.800,y.1998,no.6,content.true,page.1,css.print/issue.aspx "the injury which is continually done to the atmosphere by the respiration of such a large number of animals . .. is, in part at least, repaired by the vegetable creation" From experiment to understanding: Joseph Priestly, 1771-1772, 1780 http://home.nycap.rr.com/useless/priestly/priestly.html
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Jan Ingenhousz clarified role of light in photosynthesis, 1779
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(a) Plants (c) Unicellular protist 10 µ m 1.5 µ m 40 µ m (d) Cyanobacteria (e) Purple sulfur bacteria (b) Multicellular alga Photosynthetic Organisms Fig. 10.2
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Leaf cross section Vein Mesophyll Stomata CO 2 O 2 Chloroplast Mesophyll cell 5 µ m Thylakoid space Thylakoid Granum Stroma 1 µ m Fig. 10.3 Plant photosynthesis occurs
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12PhotosynthesisWA09PDF - Key Concepts Covered on Exam...

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