Question

More energy is produced in aerobic respiration than anaerobic respiration because in anaerobic respiration

• A. Food is incompletely oxidised
• B. Very few enzymes are involved
• C. Oxygen is not required
• D. Alcohol is produced

Answer 1

The correct option is A Food is incompletely oxidised

The oxidative breakdown of respiratory substrates with the help of atmospheric oxygen is known as aerobic respiration. It involves the complete breakdown of substrates into carbon dioxide and water releasing energy. The energy released per mole of glucose is 686 Kcal or 2870 kJ.

Oxidation of respiratory substrates in the absence of atmospheric oxygen is termed as anaerobic respiration. It involves an incomplete breakdown of respiratory substrates in which the end products such as ethanol or lactic acid are produced and carbon dioxide is released. The amount of energy released in this case is 247 kJ.

Thus, the correct answer is option A.