DP Biology (first assessment 2025)

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Question 21N.2.HL.TZ0.2b

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Date November 2021 Marks available [Maximum mark: 3] Reference code 21N.2.HL.TZ0.2b
Level HL Paper 2 Time zone TZ0
Command term Outline Question number b Adapted from N/A
b.
[Maximum mark: 3]
21N.2.HL.TZ0.2b
(b)

Outline the specific functions of three named proteins.

[3]

Markscheme

a. Rubisco fixes CO2 from atmosphere during photosynthesis;
b. insulin controls blood glucose levels;
c. collagen forms connective tissue/ligaments;
d. spider silk forms the spider web;
e. rhodopsin involved in photoreceptor;
f. immunoglobulins/antibodies attach to antigens/pathogens;
g. actin/myosin performs muscle contraction;
h. hemoglobin carries oxygen in red blood cells;

Accept any other correct three named proteins

If an enzyme is named, the correct substrate must be stated

Syllabus sections