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IB Biology Ecology 4.2
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Photosynthesis
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1. Light enters the chloroplast of the leaf cells.
2. Chlorophyll present in the grana (chloroplast) captures the light energy.
3. A part of the energy is used to split the water molecule into hydrogen and oxygen (light reaction). The splitted oxygen molecules are released into the air and the splitted hydrogen molecules are carried to the stroma.
4. Unused energy is stored in the stroma of the chloroplast. Carbon dioxide enters into the leaves.
5. Stroma combines the molecules of hydrogen and carbon dioxide to produce carbohydrates.
6. The produced carbohydrates are carried to other plant cells.
- Light energy from the sun is converted into chemical energy (food).
Formula: 6CO2+6H2O+sun energy->6O2+C6H12O6 (glucose)
2. Chlorophyll present in the grana (chloroplast) captures the light energy.
3. A part of the energy is used to split the water molecule into hydrogen and oxygen (light reaction). The splitted oxygen molecules are released into the air and the splitted hydrogen molecules are carried to the stroma.
4. Unused energy is stored in the stroma of the chloroplast. Carbon dioxide enters into the leaves.
5. Stroma combines the molecules of hydrogen and carbon dioxide to produce carbohydrates.
6. The produced carbohydrates are carried to other plant cells.
- Light energy from the sun is converted into chemical energy (food).
Formula: 6CO2+6H2O+sun energy->6O2+C6H12O6 (glucose)
