PHOTOSYNTHESIS
Photosynthesis (photo- light and synthesis- to make/ bring together)
Photosynthesis is the process of converting light energy into chemical energy. It occurs in two stages.
1. Light dependent stage
- the light energy from the sun is used to split water molecules into oxygen and hydrogen
-oxygen is released as a by-product
-energy is stored in ATP
6H2O --> 3O2 + 12H+ + energy (ATP)
2. Light independent stage
-hydrogen combines with carbon dioxide to form sugar (reduction reaction)
-ATP from light stage provide energy for this reaction
-this stage can occur in presence or absence of light (day or night)
6CO2 + 6 H+ --> C6H12O6
Products of photosynthesis:
1. The glucose is used
-during respiration to release energy
- converted and stored as starch for later use in plants
-used to make proteins, other carbohydrates (like cellulose), fats and other substances plants require
2. The oxygen is give off as a waste product, but some are used in respiration in the plant as well.
Photosynthesis is the process of converting light energy into chemical energy. It occurs in two stages.
1. Light dependent stage
- the light energy from the sun is used to split water molecules into oxygen and hydrogen
-oxygen is released as a by-product
-energy is stored in ATP
6H2O --> 3O2 + 12H+ + energy (ATP)
2. Light independent stage
-hydrogen combines with carbon dioxide to form sugar (reduction reaction)
-ATP from light stage provide energy for this reaction
-this stage can occur in presence or absence of light (day or night)
6CO2 + 6 H+ --> C6H12O6
Products of photosynthesis:
1. The glucose is used
-during respiration to release energy
- converted and stored as starch for later use in plants
-used to make proteins, other carbohydrates (like cellulose), fats and other substances plants require
2. The oxygen is give off as a waste product, but some are used in respiration in the plant as well.
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