MCQ practice · SSC Biology Board questions · Chapter 5: Food, Nutrition and Digestion
How many kilocalories of energy will Rashed get from protein?
Think it through first, then pick an option.
- a 72
- b 108
- c 144
- d 162
Answer and explanation
Correct answer: a 72
Protein is 18 g and 1 g of protein gives 4 kilocalories, so 18 × 4 = 72 kilocalories.
Why the other options are wrong
- b 108: 108 is 18 × 6; the factor for protein is 4, not 6.
- c 144: 144 is 18 × 8; the factor for protein is 4, so it is 72.
- d 162: 162 is 18 × 9, treating protein like fat; the factor for protein is 4.
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