JAMB Biology: Topics to Focus On for 2027
JAMB Biology topics to focus on for 2027 as study priorities: must-master cells and genetics, a middle tier of body systems, and lower-priority topics.
ExamPadi Editorial · Updated · 8 min read
Biology can feel like a very large subject, because it covers everything from single cells to whole ecosystems. The way to manage it is to see the logic that connects the chapters: living things are made of cells, take in materials, release energy, grow, reproduce, pass on traits and interact with their environment. If you organise your notes around that sequence, the topics support one another.
This guide arranges the JAMB Biology syllabus for the 2027 cycle into three tiers. The tiers are our study-priority judgement, based on how the syllabus builds and which chapters support others. They are not official weightings and not statistics: JAMB does not publish a topic breakdown we can verify, so we give no frequency percentages. "Must-master" means a topic worth early revision because many other questions lean on it. Check the current syllabus, the exam format and the time allowed on jamb.gov.ng.
The map of the syllabus
The ExamPadi subject outline lists: cell biology, genetics, evolution, ecology, plant nutrition, animal nutrition, reproduction, the circulatory system, respiration and excretion. These fit into a simple storyline.
| Stage of the storyline | Topics |
|---|---|
| What living things are | Cell structure, characteristics of life, classification |
| How they feed | Plant nutrition, animal nutrition |
| How they move materials | Transport, circulation, osmosis |
| How they release energy and waste | Respiration, excretion |
| How they respond and coordinate | Nervous system, hormones, sense organs |
| How they continue | Reproduction, growth, genetics |
| How they change and interact | Evolution, ecology, conservation |
Tier 1: must-master topics
Cell biology and the movement of substances
Why it matters: the cell is the unit that other topics build on. Diffusion, osmosis and active transport explain feeding, transport, excretion and plant water movement.
How to practise: draw plant and animal cells, label the organelles and state the function of each. Then make a three-row comparison of diffusion, osmosis and active transport: direction, energy needed and example.
Nutrition: plants and animals
Why it matters: photosynthesis, digestion and balanced diet are core ideas, and they link to ecology and energy flow.
How to practise: learn the photosynthesis equation and the limiting factors. For digestion, build a table of enzymes, their source, substrate and product. An original question: Which nutrient is tested with iodine solution, and what colour change shows that it is present? The nutrient is starch, and the colour change is to blue-black.
Genetics and heredity
Why it matters: genetics questions are structured and predictable once you know the vocabulary and the routine.
How to practise: learn the terms gene, allele, dominant, recessive, genotype, phenotype, homozygous and heterozygous. Then use the four-step routine for crosses. An original sex-linked example, since heredity questions can go beyond the simple tall-and-short cross: Colour blindness is carried on the X chromosome and the allele for it (Xc) is recessive. A carrier mother (XCXc) and a father with normal vision (XCY) have children. Which children can be colour-blind? The mother passes either XC or Xc, the father passes XC to daughters and Y to sons. Daughters are XCXC or XCXc, so none is colour-blind, though half are carriers. Sons are XCY or XcY, so half of the sons are expected to be colour-blind.
Ecology
Why it matters: ecology ties together organisms, energy and the environment, and it is relevant to conservation questions.
How to practise: learn the terms from habitat to biosphere, draw a food web and describe the flow of energy. Learn types of relationships and examples of each.
Tier 2: revise next
| Topic | Why it matters | How to practise |
|---|---|---|
| Circulatory system | Heart, blood vessels, blood composition | Draw the heart and trace the path of blood |
| Respiration | Aerobic and anaerobic, gaseous exchange | Compare the two forms in a table |
| Excretion | Kidney, skin, liver, lungs | Draw the nephron and state what each part does |
| Reproduction | Flowers, human reproductive systems, life cycles | Label diagrams and list stages in order |
| Classification | Kingdoms and major groups | Make a table of features and examples |
| Evolution | Natural selection, adaptation, evidence | Explain with one local example per idea |
| Nervous system and sense organs | Reflex action, the eye, the ear | Draw a reflex arc and trace the impulse |
| Plant transport | Water uptake, transpiration | Trace water from soil to leaf |
Tier 3: lower-priority topics
Cover these after the first two tiers are strong.
- Specialised adaptations: learn the examples in your syllabus but do not memorise obscure ones.
- Detailed plant hormones and tropisms: know the main ideas.
- Microbiology and public health details: learn the main diseases, causes and prevention in outline.
- Conservation and resource management details: learn definitions and basic methods.
Study order that works
| Week | Focus |
|---|---|
| 1 | Cell, classification, movement of substances |
| 2 | Nutrition, transport, respiration |
| 3 | Excretion, nervous system, reproduction |
| 4 | Genetics, evolution |
| 5 | Ecology, conservation |
| 6 | Mixed timed sets and error review |
Learning methods that help, such as spaced repetition and active recall, are covered in how to memorise faster. For approach and exam-day habits, read how to pass JAMB Biology. Questions on experiments and specimens are easier if you know the observation habits taught in the WAEC Biology practical tips.
How to practise by topic
Work 15 to 20 questions at a time on a single topic. Record each wrong answer as "did not know", "confused two terms" or "careless". Revise the "did not know" topics first, then make a pairs list for the confused terms, for example osmosis and diffusion, or mitosis and meiosis. Because the UTME is computer-based and timed, end each week with a short timed set so that recall becomes quick as well as correct.
Practise it
ExamPadi has free JAMB Biology practice with a timed CBT mode on Android, iOS, web and Windows. Use it to test each tier before moving on. Start at JAMB Biology practice, and read how to score 300 in JAMB to see how your Biology plan fits with your other subjects. No resource can guarantee a score, but ordering your revision by priority makes every study hour count for more.
Practise with real past questions and worked answers
Practise JAMB Biology freeFrequently asked questions
Where should I start with JAMB Biology?
Start with the cell and the characteristics of living things, then move to nutrition, transport and respiration. These chapters support genetics, reproduction and ecology.
Is JAMB Biology mostly memorising?
It involves recall, but understanding processes such as osmosis, photosynthesis and inheritance helps you answer questions with unfamiliar wording.
How should I revise classification?
Use a table with a group name, key features and examples. Practise telling groups apart by one or two defining features.
How do I practise genetics?
Use a fixed routine: parents' genotypes, gametes, Punnett square, then ratios. Practise a few crosses each day until the routine is automatic.