CAIE IGCSE Biology 7.4.7 Digestion of Protein By Proteases Questions

Practise comparing how pepsin digests protein in the acidic stomach and how trypsin digests it in the alkaline small intestine.

Exam points

Describe how pepsin digests protein in the acidic conditions of the stomach.
Describe how trypsin digests protein in the alkaline conditions of the small intestine.

[Maximum number: 2]

Pepsin is a protease enzyme found in the alimentary canal.

(a)

State the organ in the alimentary canal where pepsin is secreted.

[ 1 ]

(b)

The same experiment was performed with trypsin, another protease enzyme.

Predict the optimum pH for trypsin.

[ 1 ]

$(\mathrm{pH}) 8 \pm 1$ ;

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