A student is given a printed micrograph of cells from potato storage tissue. The micrograph has a magnification of ×200\times200×200.
The student draws a straight line on the micrograph across a row of 8 adjacent cells, from the outer wall of the first cell to the outer wall of the last cell. The line is 96 mm long.
Estimate the mean real width of one cell.
Give your answer in μm\mu\text{m}μm.
130 exam-style questions on OCR GCSE Biology 1.1 Cell structures, covering 1.1.1 Viewing cells with light microscopes, 1.1.2 Sub-cellular structures and functions, and 1.1.3 Electron microscopy and resolution. Each one has a worked solution and a mark scheme showing where the marks go.