Photosynthesis occurs in the chloroplasts of plant cells, as well as in some algae and bacteria.

Here's a breakdown:

* Chloroplasts: These are organelles found within plant cells. They contain chlorophyll, the green pigment that absorbs light energy for photosynthesis.

* Algae: Some algae also contain chloroplasts and perform photosynthesis.

* Bacteria: Certain types of bacteria, known as cyanobacteria, also perform photosynthesis but lack chloroplasts. They have specialized membranes that contain chlorophyll and other pigments.

So, while the specific location within the cell differs slightly, the overall process of photosynthesis takes place in the chloroplasts of plants and algae, and in specialized membranes of cyanobacteria.