What does the Cells and respiration module cover?

This module gathers the cell and respiration content of Biology 1 in WJEC GCSE Science Double Award. It covers animal and plant cell structure and organisation into tissues and organs, how cells are specialised for their jobs, using a microscope and the magnification equation, diffusion, osmosis and active transport, aerobic and anaerobic respiration with their equations, and the human breathing system and gas exchange in the alveoli.

Which unit and paper assess this module?

These topics are part of Unit 1 (Biology 1), a written paper of 1 hour 15 minutes worth 15 percent of the Double Award qualification. The paper is sat at Foundation or Higher tier and mixes short-answer, structured and extended questions, some set in a practical context.

What maths and practical skills are needed here?

You need to use the magnification equation (and rearrange it) with unit conversion between millimetres and micrometres, and to calculate percentage change in mass for the osmosis required practical. You should also know the standard methods for observing cells under a microscope and investigating osmosis in plant tissue.

What kinds of question come up?

Expect questions naming cell parts and their functions, comparing plant and animal cells, explaining how a named cell is adapted, calculating magnification or real size, comparing diffusion, osmosis and active transport, writing the aerobic respiration equation, comparing aerobic and anaerobic respiration, describing ventilation, and explaining how the alveoli are adapted for gas exchange.

How should I revise this module?

Learn the cell parts and their functions and the plant and animal differences precisely. Memorise the word and symbol equations for aerobic respiration and the products of anaerobic respiration in muscle and yeast. Drill the magnification and percentage change calculations, and link every cell adaptation and alveolar feature to its function. Use WJEC Double Award past papers and watch the command words.

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WJEC GCSE Science Double Award: Cells and respiration (Unit 1, Biology 1) overview

An overview of the Cells and respiration module in WJEC GCSE Science Double Award (Unit 1, Biology 1), mapping cell structure and organisation, specialised cells and microscopy, movement across membranes, aerobic and anaerobic respiration, and the breathing system and gas exchange.

Generated by Claude Opus 4.87 min readDouble Award Unit 1 (Biology 1)Updated 2026-06-15

Reviewed by: AI editorial process; not yet individually human-reviewed

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The topics in this module
How this module fits the exam
How to study this module

The Cells and respiration module gathers the cell and respiration content of Biology 1 in WJEC GCSE Science Double Award. It introduces the building blocks of all living things, how substances move into and out of cells, and how cells release the energy they need. These ideas underpin the rest of the biology content. This page maps the module and links to a focused answer page for each part.

The topics in this module

Cell structure and organisation: The parts of animal and plant cells and what each does, the differences between them, and how cells build tissues, organs and organ systems. See Cell structure and organisation.
Specialised cells and microscopy: How named cells are adapted to their functions, using a light microscope, and the magnification equation. See Specialised cells and microscopy.
Movement across membranes: Diffusion, osmosis and active transport, the factors affecting diffusion, the effect of osmosis on cells, and the osmosis required practical. See Movement across membranes.
Aerobic and anaerobic respiration: Respiration as energy release from glucose, the aerobic equations, and anaerobic respiration in muscle and yeast. See Aerobic and anaerobic respiration.
The respiratory system and gas exchange: The breathing system, the mechanism of ventilation, and how the alveoli are adapted for gas exchange. See The respiratory system and gas exchange.

How this module fits the exam

These topics sit in Unit 1 (Biology 1), a written paper of 1 hour 15 minutes worth 15% of the Double Award. Questions mix recall (cell parts, equations), skills (microscopy, the osmosis practical) and calculation (magnification, percentage change).

How to study this module

Learn the cell parts. Know each structure, its function, and which are plant-only.
Link adaptation to function. For every specialised cell and every alveolar feature, give the feature and why it helps.
Memorise the respiration equations. Aerobic in words and symbols; anaerobic products for muscle and yeast.
Drill the maths. Magnification (with unit conversion) and percentage change in mass.
Know the practicals. Observing cells under a microscope and the osmosis investigation.

Then test yourself with the module quiz.

Sources & how we know this

WJEC GCSE Science (Double Award) specification (from 2016) — WJEC (2016)