February/March 2026 Paper 12

2026 · 40 questions · 40 parts · 40 marks

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2Microscopy MagnificationMedium1 mark
One of the electron micrographs shows a eukaryotic cell. The other shows a prokaryotic cell.
Electron micrograph at ×91 000 magnification showing two adjacent prokaryotic cells, each with granular cytoplasm and no nucleus
Electron micrograph at ×4000 magnification showing a single eukaryotic cell with a large, roughly circular nucleus bounded by a nuclear envelope, surrounded by granular cytoplasm
What is the approximate distance across the eukaryotic cell at its widest point?