O-Level Biology 6093 Syllabus 2026: Papers, Topics + Free PDF

Study guide08 May 2026, 00:00 ZUpdated 31 May 2026

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Q: What does O-Level Biology Syllabus: 2026 Edition (Singapore) cover?
A: A parent- and student-friendly roadmap to the SEAB 6093 O-Level Biology specification - exam format, the fourteen topics across four themes, Paper 3 practical skills, and the SEAB-published apparatus and reagent lists.

TL;DR
The 2026 SEAB 6093 Biology spec organises content into 14 topics across four themes - Cells & Chemistry of Life (1-3), The Human Body (4-9), Living Together (10-11), and Continuity of Life (12-14) (SEAB syllabus PDF).
Paper 3 (Practical) runs 1 h 50 min for 40 marks (20% overall) and consists of two to three compulsory practical questions, assessing Planning (15% within Paper 3) and MMO/PDO/ACE (85%) (same source).
Master cell biology, the human-body systems, and the food-test reagent stack early so Paper 3 routines fit comfortably within the 1 h 50 min window.

Status: SEAB O-Level Biology syllabus 6093 (first exam 2026) rechecked 2026-05-31 - refresh when SEAB publishes a newer syllabus edition.

IP students: if you’re using O-Level topics to shore up Year 3-4 fundamentals, start with our IP Biology tuition hub.

Sec 3-4 students taking Pure Biology 6093 can use the O-Level Biology tuition Singapore page for the structured programme route that connects this syllabus map to Paper 2, Paper 3, diagrams, and practical routines.

Keep Your Biology Practical Stack On Track

Use our O-Level Biology Experiments hub to find companion drills for every Paper 3 skill - food tests, enzyme reactions, osmosis investigations, microscope technique and biological drawing - before you sit the practical paper.

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If you searched for 6093 syllabus, 6093 syllabus 2026, or o level biology syllabus 2026, use this page as the official-syllabus route, then move into practical or tuition support only after you know the paper structure.

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`6093 syllabus 2026`

Sources

https://www.seab.gov.sg/files/O%20Lvl%20Syllabus%20Sch%20Cddts/2026/6093_y26_sy.pdf

Paper	Duration / Marks	Weight	Headline skills
Paper 1 MCQ	1 h / 40 x 1	30 %	Breadth recall across all 14 topics
Paper 2 Structured + Free Response	1 h 45 / 80 m	50 %	Section A (70 m, structured; last two questions worth 20 m incl. one data-based question of 8-12 m); Section B (10 m, choose 1 of 2)
Paper 3 Practical	1 h 50 / 40 m	20 %	2-3 compulsory practical questions; Planning may be embedded; PDO/ACE may include data-analysis without apparatus

Topic	Core ideas	Anchor fact / formula
1. Cell Structure and Organisation	Plant vs animal cell organelles; cell specialisation under light microscope	nucleus → cytoplasm → membrane → wall (plant only)
2. Movement of Substances	Diffusion, osmosis, active transport; surface area : volume effects	water potential (qualitative)
3. Biological Molecules	Carbohydrates, proteins, fats; food-test reagents	iodine → starch (blue-black); Benedict's → reducing sugar (brick-red); biuret → protein (violet); ethanol-emulsion → fats
4. Nutrition in Humans	Balanced diet; mouth-to-anus alimentary canal; enzymes amylase, protease, lipase	mechanical + chemical digestion
5. Transport in Humans	Heart structure; blood components; double circulation; lymphatic basics	systolic → diastolic cycle
6. Respiration in Humans	Aerobic vs anaerobic respiration; gas exchange in alveoli	aerobic equation: $\text{C}_6\text{H}_{12}\text{O}_6 + 6\text{O}_2 \rightarrow 6\text{CO}_2 + 6\text{H}_2\text{O} + \text{ATP}$
7. Excretion in Humans	Kidney structure and function; urea formation; urine composition	nephron filtration → reabsorption → secretion
8. Homeostasis, Co-ordination & Response	Negative feedback; nervous + endocrine systems; insulin/glucagon; thermoregulation	reflex arc; receptor → effector
9. Infectious Diseases in Humans	Bacteria + virus structure; transmission routes; vaccination basics	herd immunity (qualitative)
10. Nutrition and Transport in Flowering Plants	Photosynthesis (limiting factors); transpiration + translocation; root + leaf structure	photosynthesis equation: $6\text{CO}_2 + 6\text{H}_2\text{O} \xrightarrow{\text{light}} \text{C}_6\text{H}_{12}\text{O}_6 + 6\text{O}_2$
11. Organisms and their Environment	Food chains/webs; energy flow; carbon and water cycles; human impact	trophic-level energy loss $\approx 90\%$ per step
12. Molecular Genetics	DNA structure; protein synthesis (transcription + translation in outline); genetic engineering applications	base pairing A-T, G-C
13. Reproduction	Asexual vs sexual reproduction; human reproductive systems; menstrual cycle; fetal development	hormones FSH, LH, oestrogen, progesterone
14. Inheritance	Monohybrid Mendel crosses; sex determination; mutations; selective breeding	Punnett square + 3 : 1 ratio

Group	Items worth knowing by name
Optical	Light microscope (2 cands : 1), hand lens ≥ ×6, microscope slides + coverslips
Measurement	Balance 0.01 g (1 per 8-12 cands), syringes 1 / 5 / 10 cm³, measuring cylinders, thermometer −10 °C to +110 °C
Specimen prep	Mounted needle, scalpel/knife, forceps, capillary tubes, Visking tubing
Standard reagents	Iodine, Benedict's, biuret, ethanol, glucose, starch, hydrogencarbonate indicator, methylene blue, cobalt chloride paper
Light source	Bench lamp with 60 W bulb (rate-of-photosynthesis investigations)

O-Level Biology 6093 Syllabus 2026: Papers, Topics + Free PDF

Keep Your Biology Practical Stack On Track

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Sources

1 | Exam Structure at a Glance

2 | Syllabus Map - Topic Flow & Anchor Concepts

3 | Assessment Objectives (AOs)

4 | What's Particular for 2026 (and Often Missed)

5 | Bridging to the Integrated Programme and H2 Biology

6 | Mini Checklist Before Each WA

7 | Apparatus + Reagent Quick-Reference

8 | Further Reading

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