Question

Aerobic respiration produces more usable chemical energy than fermentation, because fermentation involves

• A. formation of lactic acid
• B. complete oxidation of food
• C. partial oxidation of food
• D. evolution of $CO_{2}$ and alcohol

Answer 1

Answer: (C)

partial oxidation of food

Answer 2

During aerobic respiration, complete oxidation of food takes place. Thus, during it a glucose molecule produces $36$ ATP while during fermentation the food oxidises partially and instead of $CO _{2}+ H _{2} O$, formation of ethyl alcohol takes place with production of $2$ ATP per glucose molecule.