What is the function of chloroplasts in leaf cells?

• A. They store water.
• B. They capture light for photosynthesis.
• C. They transport nutrients in roots.
• D. They produce chlorophyll only but do nothing else.

Answer: (B)

Chloroplasts in leaf cells are where light energy is turned into chemical energy through photosynthesis. They contain chlorophyll, the green pigment that captures light. With that light energy, chloroplasts drive reactions that use carbon dioxide and water to make glucose (sugar) and release oxygen. This is why leaves are green and why they’re the main site for making plant food.

Storing water isn’t done by chloroplasts—the plant’s water is held in the vacuole. Transporting nutrients in roots is handled by the plant’s vascular tissues (xylem and phloem). Chloroplasts aren’t just about producing chlorophyll; their central role is to capture light and power photosynthesis to create sugars that fuel the plant’s growth.