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Question 19N.3.HL.TZ0.20b.i

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Date November 2019 Marks available [Maximum mark: 3] Reference code 19N.3.HL.TZ0.20b.i
Level HL Paper 3 Time zone TZ0
Command term Describe Question number b.i Adapted from N/A
b.i.
[Maximum mark: 3]
19N.3.HL.TZ0.20b.i

Liver transplantation is a viable treatment option for end-stage liver disease and acute hepatic failure. The graph below shows the main diseases leading to liver transplants, in three age groups.

[Source: European Liver Transplant Registry. http://www.eltr.org/Overall-indication-and-results.html]

One of the functions of the liver is to break down hemoglobin.

(b.i)

Describe the breakdown of hemoglobin in the liver.

[3]

Markscheme

a. hemoglobin taken up by Kupffer cells ✔ Do not accept confusion between erythrocytes and hemoglobin.

b. broken down into heme and globins ✔

c. globin hydrolysed/broken down to amino acids ✔

d. iron removed from heme group
OR
heme broken down to form bilirubin/bile pigment ✔

Syllabus sections