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 CO₂ and alcohol.

Answer 1

Correct option (c) partial oxidation of food

Explanation:

Aerobic respiration is the complete oxidation of food. During aerobic respiration, a glucose molecule produces 38 ATP while during fermentation incomplete oxidation of food materials in the absence of oxygen takes place. Here, formation of CO₂ and ethanol as end product is carried out. Net gain of 2 ATP occurs instead of 38 ATP as in aerobic respiration.