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KEY CONCEPT The overall process of photosynthesis produces sugars that store chemical energy.

KEY CONCEPT The overall process of photosynthesis produces sugars that store chemical energy. Photosynthetic organisms are producers. Producers are organisms that make their own source of chemical energy. Photosynthesis captures energy from sunlight to make sugars. chloroplast. leaf cell.

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KEY CONCEPT The overall process of photosynthesis produces sugars that store chemical energy.

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  1. KEY CONCEPTThe overall process of photosynthesis produces sugars that store chemical energy.

  2. Photosynthetic organisms are producers. • Producers are organisms that make their own source of chemical energy. • Photosynthesis captures energy from sunlight to make sugars.

  3. chloroplast leaf cell leaf • Chlorophyll is a molecule that absorbs light energy. • In plants, chlorophyll is found in chloroplasts.

  4. Photosynthesis in plants occurs in chloroplasts. • Photosynthesis takes place in two parts of chloroplasts. • Granum (Looks like roll of Quarters) • Are stacks of thylakoids (Each Quarter in the roll) 2. Stroma (fluid around the grana, kind of like the cell’s cytoplasm)

  5. There are two types of reactions that take place in Photosynthesis. First: Light-dependent reactions Second: Light-independent reactions.

  6. First: • The light-dependent reactions capture energy from sunlight. • take place in thylakoids • water and sunlight are needed • chlorophyll absorbs energy • energy is transferred along thylakoid membrane then to light-independent reactions • oxygen is released O2 H2O

  7. Second: • The light-independent reactions make sugars. • take place in stroma • needs carbon dioxide from atmosphere • use energy from light dependent reactions to build a sugar in a cycle of chemical reactions (Calvin’s cycle) energy CO2

  8. granum (stack of thylakoids) 1 chloroplast sunlight 6H2O 6O2 2 energy thylakoid stroma (fluid outside the thylakoids) 6CO2 1 six-carbon sugar C6H12O6 3 4 • The equation for the overall process is: 6CO2 + 6H2O  C6H12O6 + 6O2

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