Question

Aerobic respiration differs from fermentation -

• A. In having vigorous oxidation of NADH to NAD+
• B. In having partial breakdown of glucose in the presence of $O_2$
• C. In producing less ATP molecules per glucose molecule
• D. In being only catabolic in nature

Answer 1

Answer: (A)

In having vigorous oxidation of NADH to NAD+

• Aerobic respiration and fermentation are two processes which are used to provide energy to cells. In aerobic respiration, carbon dioxide, water, and energy in the form of adenosine triphosphate (ATP) is produced in the presence of oxygen. Fermentation is the process of energy production in the absence of oxygen (anaerobic respiration).
• Aerobic respiration differs from fermentation as fermentation includes vigorous oxidation of NADH to NAD+ as shown in the diagram above. During fermentation, when oxygen is limited the oxidation of NADH to NAD+ by the electron transport chain is insufficient to maintain glycolysis. Under these conditions, NAD+ is regenerated by the reduction of pyruvate to lactate.