The organelle that serves as the site of photosynthesis in a eukaryotic cell is the chloroplast.
Chloroplasts are specialized organelles found in plant cells and some protists. They contain chlorophyll, the green pigment that captures light energy from the sun. This energy is then used to convert carbon dioxide and water into glucose and oxygen through the process of photosynthesis. The ability to photosynthesize allows plants to produce their own food and play a crucial role in the Earth’s ecosystem by providing energy for themselves and the organisms that consume them.