Why is glycerol considered a non-fermentable sugar, and what is its role in aerobic conditions?

• A. Glycerol is non-fermentable because it produces excess NADH, which cannot be efficiently used in fermentation; it is used in aerobic conditions for energy production.
• B. Glycerol is non-fermentable because it lacks the necessary enzymes for glycolysis; it is used in aerobic conditions to synthesize fatty acids.
• C. Glycerol is non-fermentable because it cannot be phosphorylated; it is used in aerobic conditions to produce glucose.
• D. Glycerol is non-fermentable because it is toxic to cells; it is used in aerobic conditions to detoxify the cell.

Answer: (A)