•Cell Respiration:
–An animal produces carbon dioxide and consumes oxygen in
its metabolism of food.
Glucose is a typical food and a metabolic reaction can be represented by:
–C6H12O6 + 6O2 à 6 CO2 + 6
H2O
•Photosynthesis:
–A plant and green bacteria, on the other hand, produces
oxygen and consumes carbon
dioxide.
–Energy in the form of electromagnetic radiation (or
photons) is supplied so that the
low-energy-content carbon dioxide can be converted to high-energy-content glucose.
–An overall reaction for the complicated multi-step
photosynthesis reaction can
be represented by:
–6CO2 + 12H2O à C6H12O6 + 6O2 + 6H2O
•