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Food Science and Technology QUESTION #5961
Question 1
The lactose content of milk accounts for approximately what percentage of its caloric content?
  • \(5\%\)
  • \(27\text{–}30\%\)
  • \(45\text{–}50\%\)✔️
  • \(70\%\)
Correct Answer Explanation
Lactose (\(\approx 4.8\%\) in milk, \(4\;\text{kcal/g}\)) provides approximately \(28\text{–}30\%\) of total milk calories. Whole milk energy: fat (\(3.5\% \times 9\;\text{kcal/g} \approx 3.2\;\text{kcal/100 mL}\)), protein (\(3.2\% \times 4 \approx 1.3\;\text{kcal}\)), lactose (\(4.8\% \times 4 \approx 1.9\;\text{kcal}\)). Lactose share \(= \frac{1.9}{6.4} \approx 30\%\).