DP Biology (first assessment 2025)

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Question 22M.2.HL.TZ1.4a

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Date May 2022 Marks available [Maximum mark: 1] Reference code 22M.2.HL.TZ1.4a
Level HL Paper 2 Time zone TZ1
Command term State Question number a Adapted from N/A
a.
[Maximum mark: 1]
22M.2.HL.TZ1.4a
(a)

State the level of protein structure at which the polypeptide chains of hemoglobin are combined.

[1]

Markscheme

quaternary / fourth level;

Examiners report

Many candidates knew that association of polypeptide chains is quaternary structure. Any spelling of this term was accepted — only a minority got it correct.

Syllabus sections