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IB Biology HL 2.1.7 Pump Proteins Question Bank

Practise IB Biology HL 2.1.7 through exact HL questions on pump specificity, ion gradients, ATP-coupled conformational change and transport evidence.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Analyse how ATP hydrolysis, binding-site specificity and conformational change drive active transport.
  • Use concentration data and inhibitor evidence to infer energy-coupled pumping across a membrane.
  • Evaluate a pump diagram by linking ion gradients, transport direction and the molecular energy source.

B2.1.7—Pump proteins question 1

[Maximum number: 3]

Calcium is absorbed from food in the human gut by both active and passive processes. Outline active transport, including the benefits of the process.

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