1. Light-Dependent Reactions:
* Location: Thylakoid membrane.
* Process: This stage involves the absorption of light energy by chlorophyll and other pigments located within the thylakoid membrane. This energy is used to split water molecules, releasing electrons, protons (H+), and oxygen. The electrons are passed along an electron transport chain, generating ATP (adenosine triphosphate) and NADPH (nicotinamide adenine dinucleotide phosphate), which are energy carriers.
2. Light-Independent Reactions (Calvin Cycle):
* Location: Stroma.
* Process: This stage occurs in the stroma, the fluid-filled space surrounding the thylakoids. Here, the energy carriers (ATP and NADPH) produced in the light-dependent reactions are used to convert carbon dioxide (CO2) into glucose. This process is also called carbon fixation.
In summary:
* Light-dependent reactions: Thylakoid membrane
* Light-independent reactions (Calvin Cycle): Stroma
This separation of the two stages within the chloroplast ensures efficient energy transfer and the production of glucose, the primary product of photosynthesis.
