IB Biology SL B1.1.3 Digestion By Hydrolysis Questions

Practise IB Biology SL B1.1.3 by tracing how water-mediated hydrolysis breaks starch, proteins and lipids into smaller absorbable molecules, and how enzymes support digestion.

Exam points

Explain hydrolysis as water-mediated cleavage of carbohydrate, protein and lipid polymers into smaller absorbable molecules.
Identify amylase, proteases or peptidases, and lipase by matching each enzyme to its substrate and hydrolysis products.
Explain why enzymes and hydrolysis make food molecules small or soluble enough for absorption, using digestion and absorption models or data.

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Study B1.1.3—Digestion by hydrolysis conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

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Explain why digestion of large food molecules is essential.

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IB Biology SL B1.1.3 Digestion By Hydrolysis Questions question 1