Lecture_Class_fourteen

Lecture_Class_fourteen - 11 Light (photon) ATP CYCLE NADPH...

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1 Prebiotic: Hot springs Photosynthesis: Energy from Sunlight
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2 Photosynthesis: Energy from Sunlight
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3 What exactly is photosynthesis ?
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4 Glycolysis/TCA NADH+ H+ & ATP--Used to synthesize biomolecules Electron-Transport Chain redox : Energy for synthesis
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5 DAP NADH + H + ATP NADH + H + ATP NADH + H + ATP NADH + H + ATP
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6 e- NADP+ NADPH +H+ Used to synthesize biomolecules Light e- Photosynthesis redox: Energy from Sunlight for synthesis [H+] Photosynthesis : “synthesis from light” ATP
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7 I. The chemical and enzymatic reactions of photosynthesis
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8 A. The chemical outline: Plants take in CO 2 and release O 2 and water 2 6 12 6 2 2 6 6 6 O O H C O H CO + + NADH +H + + ATP NAD+ + ADP + Pi Two sources of oxygen: CO 2 and H 2 O
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9 2 6 12 6 2 2 6 6 6 O O H C O H CO + + 1. Determining the source of O 2 released by photosynthesis
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10 Two pathways: Light reactions : light energy converted to chemical energy (in ATP and NADPH + H + ) Light-independent reactions : use the ATP and NADPH + H + plus CO 2 to produce sugars 2. Two interdependent pathways
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Unformatted text preview: 11 Light (photon) ATP CYCLE NADPH CYCLE Light reactions Light-independent reactions CALVIN CYCLE Stroma ELECTRON TRANSPORT Thylakoid Chloroplast Chlorophyll [H+] 12 B. The light reactions Molecules that absorb specific wavelengths in the visible range of the spectrum are called pigments . 13 Photons can have a wide range of wavelengths and energy levels. 14 15 16 Accessory pigments 17 18 Light can be captured by antenna pigments (green) and transferred among themselves until reaching the special-pair chlorophyll molecules (red) in the reaction center of a photosystem 19 20 21 Photosynthesis : synthesis from light The broad outline: Plants take in CO 2 and release O 2 2 2 6 12 6 2 6 12 6 2 2 2 Light + 6 6 6 6 energy + 6 6 CO H O C H O O C H O O CO H O + + + + Animals take O 2 and release CO 2...
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Lecture_Class_fourteen - 11 Light (photon) ATP CYCLE NADPH...

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