CAIE IGCSE Biology 7.4.7 Protein Digestion by Proteases
Practise comparing protein digestion by pepsin in the acidic stomach with trypsin action in the alkaline small intestine and duodenum.
- Syllabus
- 2026–2028
- Course
- Biology 0610
Exam points
- identify pepsin as the protease that begins protein digestion in the stomach
- state that trypsin digests protein in alkaline conditions in the duodenum or small intestine
- use tables or pH evidence to link trypsin action with amino-acid products
7.4.7—Digestion of protein by proteases question 1
[Maximum number: 1]
Pepsin is a protease enzyme found in the alimentary canal.
The same experiment was performed with trypsin, another protease enzyme.
Predict the optimum pH for trypsin.
(pH)8±1;
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