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Chapter 7. The Cell: Chloroplasts . Overview. Chloroplasts are organelles that convert energy to forms that cells can use for work chloroplasts : from sunlight to ATP & carbohydrates ATP = active energy carbohydrates = stored energy. Chloroplasts. Chloroplasts are plant organelles - PowerPoint PPT Presentation
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• Chapter 7.
The Cell: Chloroplasts
Overview
Chloroplasts are organelles that convert energy to forms that cells can use for work
chloroplasts:from sunlight to ATP & carbohydrates
ATP = active energy carbohydrates = stored energy
Chloroplasts
Chloroplasts are plant organelles chloroplasts
store chlorophyll & function in photosynthesis
in leaves, other green structures of plants & in eukaryotic algae
Chloroplasts
Function photosynthesis
generate ATP & synthesize sugars transform solar energy into chemical energy produce sugars and oxygen from CO2 & H2O
Structure of a Chloroplast Structure
2 membranesouter membrane inner membrane
Structures of a Chloroplast
• Thylakoid- system of membrane that is arranged in flattened sacs
• Light reactions take place in the Thylakoids.
• Chemiosmosistakes place across the membrane of a Thylakoid.
Structures of a Chloroplast
• Granum (grana is plural) – stack of connected and layered thylakoids
Structures of a chloroplast
• Stroma- solution that surrounds the grana
The Calvin Cycle (light- independent reactions) takes place in the stroma.
Why are chloroplasts green??• Chloroplasts contain a green pigment called
chlorophyll. This is what makes plants green
• Chlorophyll has a green pigment • Pigment = a substance which produces a
characteristic color as a result of the color (of light) being reflected because of its wavelength