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II. Photosynthesis
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Review of plant cell Have cell walls and chloroplasts.
Chloroplasts are site of photosynthesis
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A. What it is… Plants use sunlight to produce sugar Equation:
6H2O + 6CO2 C6H12O6+ 6O2 (glucose)
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Chloroplasts contain green pigment called chlorophyll
3. How it works… Chloroplasts contain green pigment called chlorophyll Absorbs blue, violet & red light (energy) from sunlight
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B. Photosynthesis occurs in 2 parts
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1. Light Reaction Light (energy) absorbed by chlorophyll is used to split H2O into H and O atoms ATP is made Oxygen is a “waste product” Occurs in the thylakoids
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2. Dark Reaction (Calvin Cycle)
Using ATP, H atoms from part 1 combine with CO2 to make glucose (C6H12O6). Occurs in the stroma
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B H E A F C G D
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Chloroplast H2 O CO2 LIGHT Stroma Thylakoid Sugars O2
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