Science Editor
Overview
Photosynthesis is the biological process that converts light energy, usually from the sun, into chemical energy that can be used by organisms to fuel their activities.
The Process
The basic equation for photosynthesis is:
6CO₂ + 6H₂O + light energy → C₆H₁₂O₆ + 6O₂
This means plants take in carbon dioxide and water, use light energy, and produce glucose and oxygen.
Two Stages
Light-dependent reactions: Occur in the thylakoid membranes, converting light energy to ATP and NADPH.
Light-independent reactions (Calvin Cycle): Occur in the stroma, using ATP and NADPH to convert CO₂ into glucose.
Importance
Photosynthesis is essential for life on Earth as it:
- Produces oxygen for respiration
- Creates food for plants and animals
- Removes carbon dioxide from the atmosphere
