Free, complete O Level Biology (Cambridge 5090) resources from Mega Lecture — full-syllabus notes, topic-by-topic notes for every part of the course, a worksheet, and past papers with marking schemes. Every file is a downloadable PDF, no sign-up required.

Complete Notes

Whole-syllabus notes covering the entire 5090 course.

• O Level Biology Notes
• O Level Biology Notes (Set 2)
• IGCSE Biology Notes

Revision & Reference

• Example Candidate Responses (2014)

Notes by Topic

Topic-by-topic study notes across the whole syllabus.

Cells, Organisation & Cell Division

• Organisation & Maintenance of Organisms
• Cell Division

Nutrition

• Nutrition in Animals
• Nutrition in Plants

Transport

• Transport in Plants
• Transport in Humans

Excretion & Homeostasis

• Excretion
• Homeostasis

Coordination & Response

• The Nervous System
• The Endocrine System
• Locomotion
• Drugs

Reproduction, Inheritance & DNA

• Reproduction in Plants
• Reproduction in Humans
• Inheritance
• DNA Structure & Inheritance

Ecology, Microorganisms & Biotechnology

• Ecology
• Microorganisms & Biotechnology

Worksheets & Practice

• Biology Worksheet

Past Papers

Question papers with marking schemes.

• Paper 1 — Questions
• Paper 1 — Marking scheme
• Paper 2 — Questions
• Paper 2 — Marking scheme
• Paper 3 — Questions
• Paper 3 — Marking scheme
• Paper 6 — Questions
• Paper 6 — Marking scheme

Related resources

• All free study notes & worksheets
• O Level Chemistry notes
• O Level Physics notes

Frequently asked questions

Where can I download free O Level Biology notes?

Every item above is a free PDF — click any to open or download it, no sign-up needed.

Which syllabus do these follow?

They are aligned to the Cambridge O Level Biology 5090 syllabus (also useful for IGCSE Biology 0610).

Are past papers included?

Yes — see the Past Papers section for question papers with marking schemes.

Are these really free?

Yes, completely free. You can also book a free demo lecture below.