311C L10OL - Photosynthesis: The Process that Feed the...

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Unformatted text preview: Photosynthesis: The Process that Feed the Biosphere Energy Flow & Chemical Cycling Light energy ECOSYSTEM CO 2 + H 2 O Photosynthesis in chloroplasts Cellular respiration in mitochondria Organic molecules + O 2 ATP powers most cellular work Heat energy Figure 9.2 Photosynthesis: Overview Summary of photosynthesis: 6 CO 2 + 12 H 2 O + E C 6 H 12 O 6 + 6 O 2 + 6 H 2 O 6 CO 2 + 6 H 2 O + E C 6 H 12 O 6 + 6 O 2 CO 2 + H 2 O + E [CH 2 O] + O 2 Photosynthesis: Overview Where does O 2 come from? C O 2 + 2 H 2 O CO 2 + 2 H 2 O Photosynthesis & Redox 6 CO 2 + 6 H 2 O C 6 H 12 O 6 + 6 O 2 Photosynthesis: Overview Photosynthesis consists of two stages 1. Light reactions 2. Calvin cycle The Light Reactions Convert light energy to the chemical energy of NADPH and ATP Occurs in thylakoid membranes The Nature of Sunlight Travels in waves Particle-like behavior Photons = light particles with a fixed quantity of energy The electromagnetic spectrum Photosynthetic Pigments Absorb light that can be used to drive photosynthesis Photosynthetic Pigments Absorption spectra Chlorophyll a Chlorophyll b Carotenoids Accessory pigments...
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311C L10OL - Photosynthesis: The Process that Feed the...

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