Chapter 8 - Photosynthesis

Chapter 8 - Photosynthesis - PHOTOSYNTHESIS Click to edit...

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Click to edit Master subtitle style 4/30/11 PHOTOSYNTHESIS CHAPTER 8
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4/30/11 Trophic organization Heterotroph Must eat food, organic molecules from their environment, to sustain life Autotroph Make organic molecules from inorganic sources Photoautotroph Use light as a source of energy Green plants, algae, cyanobacteria
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4/30/11 Photosynthesis Energy within light is captured and used to synthesize carbohydrates 6CO2 + 12H2O + light energy → C6H12O6 + 6O2 + 6H2 18ATP and 12NADPH used → Glucose CO2 is reduced H2O is oxidized Energy from light drives this endergonic reaction
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4/30/11 Important players in photosynthesis A. Chloroplasts B. Light and the electromagnetic spectrum C. Pigments D. NADP+ ATP is the universal energy currency ATP is found in all types or organisms (archaea, bacteria, and eukaryotes). Cells generate ATP from glucose catabolism by substrate level phosphorylation and oxidative phosphorylation. In photosynthesis cells generate ATP by photophosphorylation 6CO2 + 12H2O + light C6H12O6 +6H2O
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4/30/11 Biosphere Regions on the surface of the Earth and in the atmosphere where living organisms exist Largely driven by the photosynthetic power of green plants Cycle where cells use organic molecules for energy and plants replenish those molecules using photosynthesis Plants also produce oxygen
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4/30/11 Chloroplast Organelles in plants and algae that carry out photosynthesis Chlorophyll- green pigment Majority of photosynthesis occurs in leaves in central mesophyll Stomata- carbon dioxide enters and oxygen exits leaf
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4/30/11 Chloroplast anatomy Outer and inner membrane Intermembrane space Thylakoid membrane contains pigment molecules Thylakoid membrane forms thylakoids Enclose thylakoid lumen Granum - stack of thylakoids Stroma- fluid filled region between thylakoid membrane and inner membrane
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4/30/11 2 stages of photosynthesis Calvin cycle – light independent Occurs in stroma Uses ATP and NADPH to incorporate CO2 into organic molecules Light reactions – light dependent Take place in thylakoid membranes Produce ATP, NADPH and O2
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This note was uploaded on 04/29/2011 for the course CELL 101 taught by Professor Burdsal during the Fall '08 term at Tulane.

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Chapter 8 - Photosynthesis - PHOTOSYNTHESIS Click to edit...

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