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1.1 Cell structures

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Question 1

A laboratory technician examines a thin section of a plant stem. The mean width of the cells is 50 μm50\ \mu\text{m}50 μm.

At a total magnification of ×400\times 400×400, the diameter of the field of view is 0.20 mm. The technician reduces the total magnification to ×100\times 100×100.

What is the best estimate of the number of cells that could fit side by side across the diameter of the field of view at ×100\times 100×100?

[1]
A

1 cell

B

64 cells

C

16 cells

D

4 cells

Markscheme

1.1 Cell structures Questions

  1. GCSE
  2. /Biology
  3. /1.1 Cell structures

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.

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