The diagram shows how milk can be treated using the enzyme lactase - Edexcel - GCSE Biology - Question 5 - 2015 - Paper 1
Question 5
The diagram shows how milk can be treated using the enzyme lactase.
(a) (i) Explain why milk is treated with lactase.
(ii) The lactase enzyme stays in the alginate... show full transcript
Worked Solution & Example Answer:The diagram shows how milk can be treated using the enzyme lactase - Edexcel - GCSE Biology - Question 5 - 2015 - Paper 1
Step 1
Explain why milk is treated with lactase.
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Answer
Milk is treated with lactase to break down lactose, the sugar present in milk, into simpler sugars such as glucose and galactose. This process produces lactose-free milk, making it suitable for individuals who are lactose intolerant and cannot properly digest lactose.
Step 2
Suggest why this is an advantage.
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Answer
The lactase enzyme being immobilized in alginate beads allows it to be reused for multiple treatment cycles, thereby reducing costs. Additionally, it prevents the enzyme from contaminating the milk, ensuring a purer final product.
