DP Biology (last assessment 2024)

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Question 22N.2.SL.TZ0.3c

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Date November 2022 Marks available [Maximum mark: 2] Reference code 22N.2.SL.TZ0.3c
Level SL Paper 2 Time zone TZ0
Command term Explain Question number c Adapted from N/A
c.
[Maximum mark: 2]
22N.2.SL.TZ0.3c

The diagram shows the molecular structure of the amino acid leucine.

(c)

Explain how enzymes are used in the preparation of milk suitable for individuals who are lactose intolerant.

[2]

Markscheme
  1. the enzyme lactase acts on lactose;
  2. the enzymes are immobilised / are bound to alginate beads;
  3. (pouring milk over the immobilised enzymes) causes lactose to be hydrolysed/broken down into monosaccharides/glucose and galactose;

Some product must be stated in mpc.

Syllabus sections