Photosynthesis is the process in which green plants use sunlight to make their own food. Photosynthesis requires sunlight, chlorophyll, water, and carbon dioxide gas as raw materials. Chlorophyll is a substance in all green plants, especially in the leaves. Plants take in water from the soil and carbon dioxide from the air.
- Photosynthesis occurs in chloroplasts, which are unique organelles. Because this organelle has its own DNA and genes, it can produce its own proteins.
- The stroma, fluid, and grana comprise chloroplasts. Chlorophyll a, chlorophyll b, and carotenoids are three essential pigments that absorb light energy in the chloroplast.