Final answer:
Photosynthesis occurs in the chloroplast, an organelle specific to plant cells. Chloroplasts have a double membrane envelope composed of an outer membrane and an inner membrane. Within the chloroplast, stacked, disc-shaped structures called thylakoids are where the light reactions of photosynthesis occur.
Step-by-step explanation:
Photosynthesis occurs in the chloroplasts of plant cells. Chloroplasts are organelles specific to plant cells where the process of photosynthesis takes place. They have a double membrane envelope composed of an outer membrane and an inner membrane, and within the chloroplasts are stacked, disc-shaped structures called thylakoids where the light reactions of photosynthesis occur.