Chloroplasts are organelles found in plant cells and some other eukaryotic organisms. They are responsible for photosynthesis, the process by which plants convert light energy into chemical energy in the form of glucose.
Chloroplasts have a double membrane structure. Inside the chloroplast, there are stacks of thylakoid membranes called grana, as well as a fluid-filled space called the stroma.
The main function of chloroplasts is to carry out photosynthesis, which involves capturing light energy and using it to convert carbon dioxide and water into glucose and oxygen. This process occurs in the thylakoid membranes and the stroma of the chloroplast.