What is Photosynthesis?
Photosynthesis is the process of converting the light energy from chloroplasts in plants to chemical energy that is stored in sugar. In autotrophic eukaryotes photosynthesis takes place in the chloroplasts which contain thylakoids. Photosynthesis is: 6CO2+12H2O+Light energy-->C6H12O6+6O2+6H2O
The Calvin Cycle occurs in the stroma by using energy from ATP and electrons from NADPH. For every three CO2 molecules that are converted into glucose one molecule of G2P exits. Alternate Mechanisms C3 plants- close their stomata and conserve water on hot and dry days. C4 plants- try to minimize the cost of photorespiration by incorporating CO2 into four-carbon compounds, and then exported into bundle-shealth cells CAM- open their stomata at night which involves CO2 and organic acids. |