How to Show Oxygen Is a By Product of Photosynthesis
Plants respire all the time because their cells need energy to stay alive, but plants can only photosynthesise when they are in the light.The diagrams summarise what this means for the overall release of carbon dioxide or oxygen from plants.
NOVA - Official Website | Illuminating Photosynthesis
Photosynthesis is a process where by energy from light is harvested and used to drive synthesis of carbohydrates from carbon dioxide and water. Photophosphorylation is a process where the light energy captured by the photosynthetic organisms is transformed into the phosphate bond energy of ATP. Components of photosystem I and II transfer the electrons from water to NADP. Second step of photosynthesis is called Calvin’s cycle and it is a dark reaction. There are two stages here, I and II. Stage I is carbon dioxide fixation and stage II is the regeneration phase. Photorespiration is the process wherein oxygen consumption occurs in illuminated temperature zone of plants under high oxygen and low carbon dioxide. C4 cycle is the pathway adopted by C4 plants to conserve the carbon dioxide released via photorespiration. It occurs in mesophyll cells.
Decarboxylation of malate during the day releases CO2 inside the leaves thus allowing carbon fixation to 3-phosphoglycerate by rubisco. Although some of the steps in photosynthesis are still not completely understood, the overall photosynthetic equation has been known since the 1800s. Jan van Helmont began the research of the process in the mid-1600s when he carefully measured the of the soil used by a plant and the mass of the plant as it grew.