Photosynthetic organisms are producers.

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Presentation transcript:

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

Photosynthetic organisms are producers. Producers make their own source of chemical energy. (Autotrophs) Plants use photosynthesis and are producers. Photosynthesis captures energy from sunlight to make sugars. Endergonic Reaction: Reaction that requires energy (sun) End Result: Oxygen and Sugar

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

Photosynthesis in plants occurs in chloroplasts. Photosynthesis takes place in two parts of chloroplasts. grana (thylakoids) stroma chloroplast stroma grana (thylakoids)

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 What happens? oxygen is released hydrogen kept for later use End Result: H, ATP, O

The light-independent reactions make sugars. take place in stroma needs carbon dioxide from atmosphere use energy to build a sugar in a cycle of chemical reactions

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

Review What is used during the light dependent reactions? What is created during the light dependent reactions? What is used during the light independent reactions? What is created during the light independent reactions? Where does light independent take place?