Subject Tutorials

Understanding Photosynthesis and Respiration: ECZ Biology Tutorial

ECZ Solutions Editorial Team  |  March 2, 2026  |  12 Min Read
Complementary Biological Processes

Photosynthesis stores solar energy in glucose, while Cellular Respiration breaks down glucose to release energy (ATP) for living cells. They are opposite yet complementary biological reactions.

1. Photosynthesis Explained

Photosynthesis Balanced Equation:
\(6\text{CO}_2 + 6\text{H}_2\text{O} \xrightarrow[\text{Chlorophyll}]{\text{Sunlight}} \text{C}_6\text{H}_{12}\text{O}_6 + 6\text{O}_2\)

2. Cellular Respiration: Aerobic vs Anaerobic

  • Aerobic Respiration (With Oxygen): Produces 38 ATP molecules per glucose molecule. Equation: \(\text{C}_6\text{H}_{12}\text{O}_6 + 6\text{O}_2 \rightarrow 6\text{CO}_2 + 6\text{H}_2\text{O} + \text{Energy (ATP)}\).
  • Anaerobic Respiration in Humans (Lactic Acid Fermentation): Occurs during strenuous exercise, producing lactic acid and muscle fatigue.