Which process primarily occurs in chloroplasts and yields glucose and oxygen using light energy?

Which process primarily occurs in chloroplasts and yields glucose and oxygen using light energy?

• A. Photosynthesis
• B. Respiration
• C. Transpiration
• D. Osmosis

Answer: (A)

Photosynthesis is the process by which plants, algae, and some bacteria use light energy to build glucose from carbon dioxide and water, releasing oxygen in the process. In chloroplasts, light energy drives the light-dependent reactions that split water and produce ATP and NADPH, then the Calvin cycle uses those energy carriers to synthesize glucose from CO2. This location-specific, light-driven pathway is why glucose and oxygen are produced. The other options don’t fit: respiration uses mitochondria to break down glucose for energy; transpiration is just water loss from leaves; osmosis is the movement of water across membranes.

Photosynthesis is the process by which plants, algae, and some bacteria use light energy to build glucose from carbon dioxide and water, releasing oxygen in the process. In chloroplasts, light energy drives the light-dependent reactions that split water and produce ATP and NADPH, then the Calvin cycle uses those energy carriers to synthesize glucose from CO2. This location-specific, light-driven pathway is why glucose and oxygen are produced. The other options don’t fit: respiration uses mitochondria to break down glucose for energy; transpiration is just water loss from leaves; osmosis is the movement of water across membranes.