DP Biology (last assessment 2024)

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Question 20N.3.SL.TZ0.b

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Date November 2020 Marks available [Maximum mark: 2] Reference code 20N.3.SL.TZ0.b
Level SL Paper 3 Time zone TZ0
Command term Explain Question number b Adapted from N/A
b.
[Maximum mark: 2]
20N.3.SL.TZ0.b

The micrograph shows a section through part of the liver. The diagram illustrates the details of what is found within the marked area.

[micrograph] Micrograph of liver. https://undergraduate.vetmed.wsu.edu/courses/vph-308/histology/lab-1-histologycells-
and-organelles/liver-slide-wsu_2_052 courtesy of Patrick D. Wilson, MS, DVM, Clinical Associate Professor,
Veterinary Integrative Biosciences, College of Veterinary Medicine & Biosciences, Texas A&M University.

[diagram] Reprinted by permission from Springer Nature, Nature Reviews Immunology, “Aberrant homing of mucosal
T cells and extra-intestinal manifestations of inflammatory bowel disease” by Adams and Eksteen ©2006. https://www.nature.com/nri/

Explain the function of hepatocytes in protein metabolism.

[2]

Markscheme

a. they produce/secrete plasma proteins;

b. (the plasma proteins) are modified/secreted by the Golgi apparatus;

c. protein/globin is broken down into amino acids;

Examiners report

The function of the hepatocytes in protein metabolism was challenging for most candidates despite this being taken directly from an assessment statement.