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Master A-Levels with
notes, questions, mark schemes

Free Biology and Chemistry revision for AS and A-Level. Notes in the wording examiners credit, and exam-style questions with the full mark scheme.

Biology

8 topics · 39 subtopics

Chemistry

3 topics · 34 subtopics

Blog

Revision technique, exam advice and how to read a mark scheme.

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The Common Room

Ask a question, compare answers and revise alongside other students on Discord.

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Notes

Revise with mark scheme specific notes.

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Example

Cellulose structure

  • Made of β-glucose joined by 1,4-glycosidic bonds.

  • This gives long, straight, unbranched chains that lie side by side.

  • Many hydrogen bonds cross-link the chains into strong microfibrils.

Questions

Test yourself with exam board style questions.

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Example
Question 1 of 48[3 marks]

Cellulose is well adapted to its structural role in plant cell walls. Explain how its structure provides strength.

Dashboard

See exactly where your marks are going.

Open your dashboard
Example

Biological molecules

  • Carbohydrates82%
  • Proteins56%
  • Enzymes31%

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