Respiration: - It is the process by which living organism’s breaks down glucose into carbon dioxide, water and energy. It may be of two types;
Aerobic Respiration:- Oxygen is required and glucose is completely oxidized with the help of enzymes to carbon dioxide and energy.
Anaerobic Respiration:- This process is independent of molecular oxygen. In this process also called “fermentation” glucose is partially broken down.
Cellular Respiration:- The process by which glucose is completely oxidized in mitochondrion to carbon dioxide and energy. In this process 38 molecules of ATP (Adenosine Triphosphate) is formed from molecule of glucose.
C6H12O6 + 6O2 ←→ 6CO2 + 6H2O - ΔE (625 Kcal)
C6H12O6 ←→ 2C2H5OH +H2O +2CO2 – ΔE (140 Kcal)