Chloroplasts Chloroplasts Chloroplasts are only found in photosynthetic, eukaryotic cells.
Chloroplasts are capable of harnessing energy from the sun's rays of light.
Using this energy from the sunlight, chloroplasts are able to form ATP as well as synthesizing sugars from water and carbon dioxide. These layers surround a semi-fluid interior called the stroma. Within the stroma, another system of interconnecting, disk-shaped compartments are formed. Light-trapping pigments, enzymes, and other proteins are responsible for the first stage of photosynthesis. This synthesis stage occurs in the stroma.