May/June 2026 Paper 13

2026 · 40 questions · 40 parts · 40 marks

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3Cell Structure OrganellesMedium1 mark
The electron micrograph shows part of an animal cell. This part of the cell is producing large quantities of a biological molecule.
Electron micrograph of part of an animal cell showing densely packed, parallel flattened membranes studded with small dark granules (rough endoplasmic reticulum with ribosomes on its surface), with a few darker rounded organelles among the membrane stacks.
What is being produced in this part of the cell?