- The structure shown is a chloroplast, an organelle found in plant cells responsible for photosynthesis.
- It has a double membrane: an outer membrane and an inner membrane, with an intermembrane space between them.
- Inside the inner membrane is the stroma, a fluid-filled space containing enzymes for the Calvin cycle.
- Within the stroma are thylakoids, flattened sac-like structures that contain chlorophyll and other pigments.
- Thylakoids are often stacked into grana (singular: granum), connected by lamellae (unstacked thylakoids).
- The interior of each thylakoid forms a lumen, which is important for creating a proton gradient during the light-dependent reactions.
Parent Tip: Review the logic above to help your child master the concept of chloroplast worksheet.
