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IB Biology SL B2.1.7 Pump Proteins Questions

Explain how selective pump proteins use ATP to move ions or molecules against concentration gradients, including sodium-potassium evidence in IB Biology SL B2.1.7.

Syllabus
First assessment 2025
Course
Biology SL
Level
SL

Exam points

  • Define active transport as movement of specific ions or molecules against a concentration gradient using energy from ATP.
  • Explain that pump proteins are selective membrane carriers that change conformation during ATP-powered transport.
  • Use sodium-potassium pumps or another scored cellular example to explain active transport and its concentration-gradient effect.

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Study B2.1.7—Pump proteins conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB Biology SL B2.1.7 Pump Proteins Questions question 1

[Maximum number: 2]

Explain the role of protein pumps in active transport.

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