What are the different ways in which glucose is oxidized to provide energy in various organisms?

(i) Aerobic. C₆H₁₂O₆ + 6O₂ → 6 CO₂ + 6 H₂O + Energy

(ii) Anaerobic,

(a) C₆H₁₂O₆ → 2 Ethanol + 2 CO₂ + Energy.

(b) C₆H₁₂O₆ → 2 Lactic acid + Energy