You would find a plant's chloroplasts primarily in the cells of the green tissues, especially concentrated in the parenchyma cells of the leaf mesophyll, which are the internal cell layers of a leaf
. Chloroplasts are located throughout the cytoplasm of these cells
. More specifically, within a leaf, chloroplasts are abundant in the palisade and spongy mesophyll cells, which are specialized for photosynthesis
. They are organelles enclosed by a double membrane and contain internal thylakoid membranes arranged in stacks called grana, where photosynthesis takes place
. Chloroplasts are generally absent from root cells because roots typically do not perform photosynthesis due to lack of light exposure
. Thus, if you are looking for chloroplasts in a plant, the best place to look is inside the leaf cells, particularly the mesophyll cells.
