Igcse Model Questions Vol1 2021 Biology Question 3

Practice essay / theory question 3 from the 2021 Igcse Model Questions Vol1 Biology examination. This question covers Nutrition, Digestive system, Macronutrient metabolism .

Igcse Model Questions Vol1 2021 Biology Essay / Theory

Topics: Nutrition Digestive system Macronutrient metabolism

Question 3 IGCSE_MODEL_QUESTIONS_VOL1 • 2021 • BIOLOGY • essay

The diagram shows a labelled human digestive system highlighting the mouth, oesophagus, stomach, small intestine (duodenum, jejunum, ileum), large intestine, liver, pancreas and gallbladder.

Question Parts

( a )

For each organ shown, briefly describe its principal function in the digestion and absorption of nutrients.

( b )

State where the majority of carbohydrate, protein and lipid digestion occurs and give a brief justification for each.

( c )

A diet supplies 2500 kJ from carbohydrates, 1500 kJ from proteins and 2000 kJ from fats. (i) Calculate the mass in grams of each macronutrient consumed. (ii) The recommended energy distribution is 55 % carbohydrate, 15 % protein and 30 % fat. Comment on whether the diet meets these recommendations.

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About This Question

This is Igcse Model Questions Vol1 2021 Biology Question 3. It is one of the essay questions from the 2021 Igcse Model Questions Vol1 Biology examination.

The question covers Nutrition, Digestive system, Macronutrient metabolism .

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