CAIE IGCSE Biology 7.4.8 Bile, pH & Neutralisation
Practise explaining how alkaline bile from the liver and gall bladder neutralises acidic stomach contents in the duodenum so trypsin and lipase can work.
- Syllabus
- 2026–2028
- Course
- Biology 0610
Exam points
- state that alkaline bile neutralises acidic gastric juice or HCl entering the duodenum
- link bile neutralisation to a suitable pH for trypsin digestion of protein
- explain lipase pH conditions using bile made by the liver and released from the gall bladder
7.4.8—Bile is an alkaline mixture that question 1
[Maximum number: 2]
Explain the role of bile in the breakdown of protein by trypsin.
(bile) is alkaline and so neutralises the mixture (from the stomach) / (bile) neutralises the (named) acidic mixture (from the stomach) ; provides, optimum / suitable, pH (for trypsin activity) ;
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