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IB Biology SL 2.3.6 Surface Area-to-Volume Ratio Question Bank

Practise IB Biology SL 2.3.6 using exact SL questions on cell geometry, exchange rates, metabolic demand and the limits of cell size.

Syllabus
First assessment 2025
Course
Biology SL
Level
SL

Exam points

  • Explain why surface-area-to-volume ratio falls as a cell grows and limits material exchange.
  • Relate cell surface area to exchange rates and cell volume to metabolic demand and waste production.
  • Interpret cell geometry or graph evidence to compare surface area, volume and exchange efficiency.

B2.3.6—Surface area-to-volume ratios question 1

[Maximum number: 2]

The following shows an electron micrograph of a liver cell.

Figure for Question B2.3.6—Surface area-to-volume ratios question 1 — IB Biology SL

Outline the significance of the relationship between the surface area and volume of a cell.

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