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CAIE IGCSE Biology 7.4.5 Functions of Hydrochloric Acid Questions

Practise explaining how hydrochloric acid in gastric juice provides an optimum acidic pH for enzyme activity and kills harmful microorganisms in food.

Syllabus
2026–2028
Course
Biology 0610

Exam points

  • Explain how hydrochloric acid in gastric juice provides an optimum acidic pH for enzyme activity.
  • Explain that hydrochloric acid kills harmful microorganisms in food.

CAIE IGCSE Biology 7.4.5 Functions of Hydrochloric Acid Questions question 1

[Maximum number: 3]

Fig. 2.1 is a diagram of the human alimentary canal and associated organs.

Fig. 2.1

Fig. 2.1

Explain the role of hydrochloric acid in the alimentary canal.

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