1. Light-Dependent Reactions:
* Location: Chloroplasts, specifically the thylakoid membranes.
* Ingredients: Sunlight, water (H2O), and chlorophyll (the green pigment in plants).
* Process:
* Sunlight energy is captured by chlorophyll and used to split water molecules.
* This splitting releases electrons, which are used to create ATP (adenosine triphosphate) and NADPH (nicotinamide adenine dinucleotide phosphate).
* Oxygen (O2) is released as a byproduct.
2. Light-Independent Reactions (Calvin Cycle):
* Location: Chloroplasts, specifically the stroma (the fluid inside the chloroplast).
* Ingredients: Carbon dioxide (CO2), ATP, and NADPH.
* Process:
* Carbon dioxide from the atmosphere is used to create a simple sugar molecule called glucose.
* This process requires energy from ATP and reducing power from NADPH, both produced in the light-dependent reactions.
Here's a simple summary:
1. Sunlight provides energy.
2. Water is split, releasing electrons and oxygen.
3. Electrons are used to create energy-carrying molecules (ATP and NADPH).
4. Carbon dioxide is used to create glucose (sugar) with the help of ATP and NADPH.
In short, plants use sunlight, water, and carbon dioxide to create glucose (sugar) as their food source, releasing oxygen as a byproduct. This sugar provides energy for the plant's growth, development, and other vital functions.
