Igcse Model Questions Vol1 2023 Biology Question 3

Practice essay / theory question 3 from the 2023 Igcse Model Questions Vol1 Biology examination. This question covers Nutrition, Digestive system, Enzymes, Metabolism .

Igcse Model Questions Vol1 2023 Biology Essay / Theory
Topics: Nutrition Digestive system Enzymes Metabolism
Question 3 IGCSE_MODEL_QUESTIONS_VOL1 • 2023 • BIOLOGY • essay
Igcse Model Questions Vol1 2023 Biology Question 3 diagram

The diagram shows a labelled illustration of the human digestive system.

Question Parts

( a )
Identify the organ in which the majority of chemical digestion of carbohydrates occurs. State the principal enzyme(s) involved and briefly describe how they act on the carbohydrate molecules.
( b )
Explain the role of the pancreas in digestion. In your answer, include the types of secretions released, the hormones that regulate their release and the importance of these secretions for the digestion of proteins, fats and carbohydrates.
( c )
Using the labelled diagram, describe the complete pathway of a food bolus from the moment it is swallowed until the undigested residue is expelled as faeces. For each major organ, state one key process that occurs there.
( d )
Lactase deficiency (lactose intolerance) impairs the digestion of the disaccharide lactose. Discuss the physiological consequences of this deficiency and suggest two practical dietary adjustments that can minimise the problem.

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About This Question

This is Igcse Model Questions Vol1 2023 Biology Question 3. It is one of the essay questions from the 2023 Igcse Model Questions Vol1 Biology examination.

The question covers Nutrition, Digestive system, Enzymes, Metabolism .

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