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IB Biology HL B1.2.11 Hl Quaternary Structure Questions

Explore how haemoglobin, insulin and other proteins combine polypeptide chains into a functional quaternary structure in IB Biology HL B1.2.11.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Classify a protein with multiple associated polypeptide chains as quaternary structure.
  • Identify haemoglobin’s alpha/beta subunits and attached haem groups in a protein model.
  • Use insulin diagrams to identify two polypeptide chains linked by disulfide bridges.

IB Biology HL B1.2.11 Hl Quaternary Structure Questions question 1

[Maximum number: 1]

Hemoglobin is a conjugated protein consisting of four polypeptide chains with attached heme groups.

Figure for Question IB Biology HL B1.2.11 Hl Quaternary Structure Questions question 1 — IB Biology HL

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

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