Cambridge O Level
Biology
Syllabus 50902026–202819 chapters
Cambridge O Level Biology (5090) for exams in 2026, 2027 and 2028 — chapter revision notes, key definitions and topical MCQ and structured practice.
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Syllabus Chapters
19 chapters01
Cells
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02
Classification
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03
Movement Into and Out of Cells
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04
Biological Molecules
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05
Enzymes
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06
Plant Nutrition
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07
Transport in Flowering Plants
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08
Human Nutrition
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09
Human Gas Exchange
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10
Respiration
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11
Transport in Humans
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12
Disease and Immunity
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13
Excretion
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14
Coordination and Control
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15
Coordination and Response in Plants
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16
Development of Organisms and Continuity of Life
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17
Inheritance
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18
Biotechnology and Genetic Modification
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19
Relationships of Organisms with One Another and with the Environment
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