Syllabus Edition

First teaching 2023

First exams 2025

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Drawing Cells: Skills (HL IB Biology)

Revision Note

Cara Head

Author

Cara Head

Last updated

Drawing Cells: Skills

Drawing the ultrastructure of cells

  • To record the observations seen under the microscope (or from photomicrographs taken) a labelled biological drawing is often made
  • Biological drawings are line pictures that show specific features that have been observed when the specimen was viewed
  • There are a number of rules/conventions that are followed when making a biological drawing

Drawing conventions

  • The drawing must have a title
  • The magnification under which the observations shown by the drawing are made must be recorded where possible
    • A scale bar may be used
  • A sharp HB pencil should be used (and a good eraser!)
  • Drawings should be on plain white paper
  • Lines should be clear, single lines (no sketching)
  • No shading
  • The drawing should take up as much of the space on the page as possible
  • Well-defined structures should be drawn
  • The drawing should be made with proper proportions
  • Label lines should not cross or have arrowheads and should connect directly to the part of the drawing being labelled
  • Label lines should be kept to one side of the drawing (in parallel to the top of the page) and drawn with a ruler
  • Drawings of cells are typically made when visualising cells at a higher magnification power, whereas plan drawings are typically made of tissues viewed under lower magnifications (individual cells are never drawn in a plan diagram)
  • You are also expected to include the functions of organelles and cells as part of the annotations made

Examples of biological drawings

Scanning electron micrograph and drawing of a prokaryotic cell

Bacterial cell micrograph and biological drawing

Transmission electron micrograph and drawing of a plant cell

Plant cell micrograph and biological drawing

Examiner Tip

When producing a biological drawing, it is vital that you only ever draw what you see and not what you think you see or assume should be visible.

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Cara Head

Author: Cara Head

Expertise: Biology

Cara graduated from the University of Exeter in 2005 with a degree in Biological Sciences. She has fifteen years of experience teaching the Sciences at KS3 to KS5, and Psychology at A-Level. Cara has taught in a range of secondary schools across the South West of England before joining the team at SME. Cara is passionate about Biology and creating resources that bring the subject alive and deepen students' understanding