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PHOTOSYNTHESIS

PHOTOSYNTHESIS. Getting energy to live. Baby heterotroph!. Heterotrophs must consume organic molecules for energy. Cellular respiration. Autotrophs produce their own food molecules Photosynthesis Cellular respiration. Autotroph. Capturing the Energy in Light.

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PHOTOSYNTHESIS

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  1. PHOTOSYNTHESIS

  2. Getting energy to live Baby heterotroph! • Heterotrophs must consume organic molecules for energy. • Cellular respiration. • Autotrophs produce their own food molecules • Photosynthesis • Cellular respiration Autotroph

  3. Capturing the Energy in Light • Photosynthesis is an example of a biochemical pathway. • Captures light energy. • Stores energy in form of chemical bonds. • Chemical bonds are in organic compounds.

  4. Light Absorption in Chloroplasts • Chloroplasts are the structures that capture light. • Photosynthesis Reactions takes place in the chloroplasts. • Chloroplasts were once free living. (Pair share: just like…) Structure of a Chloroplast

  5. Chloroplast structure • Chloroplasts are composed of: • Double membrane. • Thylakoids. • Grana • Stroma Structure of a Chloroplast

  6. Energy For Life Processes • Photosynthesis • Raw materials are water and carbon dioxide. • Products are glucose and oxygen. • Energy source is sunlight.

  7. A series of biochemical pathways • There are 2 main biochemical pathways • light dependent • Uses electrons “excited” by sunlight for energy • has 2 phases: photosystems 1 & 2 • Takes place in thylakoid • light independent (Calvin cycle). • Uses ATP & NADPH for energy to make glucose • Takes place in the stroma Diagram of the phases of photosynthesis

  8. Cyclical processes • Photosynthesis and cellular respiration form a cycle. • Carbon dioxide & water • Oxygen & glucose • Heterotrophs • Autotrophs Photosynthesis - respiration cycle

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