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Cambridge IGCSE Biology practice

Paper 3 structured question: Chemical digestion

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Attempt questionChemical digestion revisionRevise the key idea

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Chemical digestion

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Paper 3Theory (Core)2 marks

Digestive enzymes and their locations

Diagram Description

Digestive system showing enzyme production and action sites

The diagram shows the mouth, stomach, pancreas, and small intestine with labels indicating where amylase, protease, and lipase are produced and where they act.

EnzymeProduced inActs in
AmylaseSalivary glands and pancreasMouth and small intestine
ProteaseStomach and pancreasStomach and small intestine
LipasePancreasSmall intestine
  1. a

    Identify Where is amylase produced?

    Aim for approximately 1 distinct marking point.

    [1]
  2. b

    State Where does lipase act?

    Aim for approximately 1 distinct marking point.

    [1]

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Paper 3 structured question: Chemical digestion

Paper 3Theory (Core)2 marks

Data Table

Enzyme production and action sites

The table below shows where three digestive enzymes are produced and where they act in the digestive system.

EnzymeProduced inActs in
AmylaseSalivary glands and pancreasMouth and small intestine
ProteaseStomach and pancreasStomach and small intestine
LipasePancreasSmall intestine
  1. a

    Identify Where is protease produced?

    Aim for approximately 1 distinct marking point.

    [1]
  2. b

    State Where does protease act?

    Aim for approximately 1 distinct marking point.

    [1]