What is the main function of chloroplasts in plant cells?

What is the main function of chloroplasts in plant cells?

• A. Absorb sunlight and convert water and carbon dioxide into glucose.
• B. Store genetic material and regulate cellular activities.
• C. Produce ATP through cellular respiration.
• D. Break down waste products within the cell.

Answer: (A)

Chloroplasts are the sites of photosynthesis, where light energy is captured and used to build glucose from carbon dioxide and water. In the light-dependent reactions, light drives the splitting of water, releasing oxygen and producing ATP and NADPH. Those energy carriers feed the Calvin cycle in the stroma, which fixes carbon dioxide into sugar that eventually becomes glucose. The overall result is storing energy in glucose with oxygen as a byproduct. Chloroplasts aren’t primarily for storing genetic material or breaking down wastes, and producing ATP in the context of cellular respiration happens mainly in mitochondria, not chloroplasts.

Chloroplasts are the sites of photosynthesis, where light energy is captured and used to build glucose from carbon dioxide and water. In the light-dependent reactions, light drives the splitting of water, releasing oxygen and producing ATP and NADPH. Those energy carriers feed the Calvin cycle in the stroma, which fixes carbon dioxide into sugar that eventually becomes glucose. The overall result is storing energy in glucose with oxygen as a byproduct. Chloroplasts aren’t primarily for storing genetic material or breaking down wastes, and producing ATP in the context of cellular respiration happens mainly in mitochondria, not chloroplasts.