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IB Biology SL B2.3.6 Surface Area to Volume Ratios Questions

Explore how cell geometry links surface area to exchange, volume to metabolic demand and low ratios to diffusion limits in IB Biology SL B2.3.6.

Syllabus
First assessment 2025
Course
Biology SL
Level
SL

Exam points

  • Explain why a growing cell's surface area-to-volume ratio falls as volume outpaces surface area.
  • Relate cell surface area to exchange and volume to metabolic, waste or resource demand.
  • Interpret a cell-diameter graph or size-change table to compare surface area, volume and their ratio.

IB Biology SL B2.3.6 Surface Area to Volume Ratios Questions question 1

[Maximum number: 2]

The following shows an electron micrograph of a liver cell.

Figure for Question IB Biology SL B2.3.6 Surface Area to Volume Ratios Questions question 1 — IB Biology SL

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

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