DP Biology (last assessment 2024)

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Question 21M.2.SL.TZ1.3b

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Date May 2021 Marks available [Maximum mark: 2] Reference code 21M.2.SL.TZ1.3b
Level SL Paper 2 Time zone TZ1
Command term Explain Question number b Adapted from N/A
b.
[Maximum mark: 2]
21M.2.SL.TZ1.3b

Celiac disease is an immune reaction to eating gluten, a protein found in many cereals. The diagram shows the arrangement of normal villi and villi affected by celiac disease in the small intestine.

(b)

Explain the consequences of celiac disease for absorption of digested nutrients.

[2]

Markscheme

a. (celiac disease/gluten causes) much smaller villi/flattened villi/smaller surface area (of villi) / no villi ✔

b. (smaller villi leads to) less efficient/less/slower/poor absorption
OR
nutrients/energy lost / fatigue/malnutrition may result ✔

c. (celiac sufferers) must eat a gluten-free diet / WTTE ✔

Note that this question requires an explain not an outline.

Examiners report

Generally, parts (a) and (b) were answered clearly and in alignment with the command terms.

Syllabus sections