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Cambridge IGCSE Biology practice

Paper 3 structured question: Chemical digestion

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3

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1

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Chemical digestion

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Paper 3Theory (Core)1 marks

Chemical digestion is a process that breaks down large food molecules into small soluble molecules.

Description

Chemical Digestion

Enzymes in the digestive system break down carbohydrates, proteins, and fats into smaller molecules that can be absorbed by the body.

  1. a

    State why chemical digestion is important for absorption.

    Aim for approximately 1 distinct marking point.

    [1]

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Paper 3 structured question: Chemical digestion

Paper 3Theory (Core)2 marks

Description

Chemical Digestion and Absorption

Large molecules like proteins, carbohydrates, and fats are broken down into amino acids, simple sugars, and fatty acids respectively, which are small and soluble.

  1. a

    Identify the importance of chemical digestion in the absorption of nutrients.

    Aim for approximately 2 distinct marking points.

    [2]