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CAIE A-Level Biology 8.2.4 Adult Haemoglobin Dissociation Curve

Practise reading haemoglobin saturation at stated pO₂, explaining sigmoid cooperative binding and interpreting right or left shifts as changes in oxygen affinity.

Syllabus
2028–2030
Course
Biology 9700
Level
AS

Exam points

  • read haemoglobin percentage saturation from a stated partial pressure of oxygen
  • explain the sigmoid curve through cooperative binding after the first oxygen binds
  • interpret a right shift as lower affinity and easier unloading at a given pO₂

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