JAMB Biology past questions and answers

What UTME Biology actually tests

Biology carries 40 of the UTME's 180 questions, about 89 of the 400 marks, and a well-paced candidate gives it 25–30 minutes. Because there are no long calculations, most candidates finish Biology comfortably on time. The problem is never speed. The problem is that four answer options in Biology are often four true-sounding sentences, and only a candidate who knows the material precisely can tell which one is exactly right.

That has a practical consequence: reading your textbook until it "feels familiar" is not preparation. Familiarity is exactly what the wrong options are designed to exploit. The preparation that works is answering hundreds of past questions and reading the explanation each time, because that trains you to notice the one word that makes an option wrong: most insects, all mammals, diffusion against a gradient.

The Biology paradox: it is the science subject candidates fear least and the one where confident candidates most often score below their expectation. Recognising material is not the same as knowing it exactly.

The topics JAMB repeats every year

UTME Biology draws from a stable set of topic areas, year after year. This is the high-yield core; check the official syllabus at jamb.gov.ng (or our JAMB syllabus 2026 guide) for the full breakdown, but plan your revision around these:

Use this table as triage. After a few practice sessions you will know which two or three rows are your weak ones, those, not the whole table, are your next fortnight.

Precision: why "almost right" scores zero

In a multiple-choice paper there is no partial credit, and Biology exploits that harder than any other science. Consider the pairs UTME questions love to sit on: osmosis and diffusion; respiration and breathing; excretion and egestion; habitat and niche; population and community; heterotrophic and saprophytic. Each pair differs by one precise idea, and one option in the question will be the sibling term, sitting there for everyone who learned the "rough idea".

The fix is cheap: whenever a practice question turns on a definition, write the definition out once, in full, in your own jotter. Not the vibe of it, the actual defining condition ("movement of water molecules through a semi-permeable membrane…"). A definition you have written is dramatically harder to mix up than one you have only read.

Diagram and specimen questions

A noticeable share of UTME Biology questions are built around a figure: a labelled diagram with a part marked, or a described specimen you must identify. These questions feel unfair to candidates who prepared only from prose notes, and feel like free marks to candidates who have met the same figures in past papers, because the exam draws on a familiar pool: the flower, the heart, the kidney, the eye, the ear, insect mouthparts, the amoeba and paramecium, root and leaf sections.

• Learn structures as pictures, not paragraphs. When you revise the heart, sketch it and label it from memory. If you can label it, you can answer any question hung on it.
• Always pair the part with its function. The question is rarely "what is X?". It is "what does the part labelled X do?" or "which part does Y?". Label and function are one fact, learned together.
• Meet the recurring figures in past papers. There is no shortcut here: the diagrams repeat, so the candidate who has worked ten years of papers has effectively seen the exam's picture library in advance.

Genetics: draw the square, don't guess

Genetics is the topic candidates most often surrender to guessing, and it is one of the most mechanical topics on the paper. A typical UTME genetics question is a monohybrid cross: tall crossed with short, red-flowered with white, carrier with normal. The procedure never changes:

1. Write the parent genotypes (assign letters if the question doesn't: T for the dominant allele, t for the recessive).
2. Sketch a 2×2 Punnett square on your rough sheet and fill in the four offspring genotypes.
3. Read off whatever the question asks. The ratio, the percentage, the probability of one offspring type.

The whole routine takes under a minute, and it converts a coin-flip guess into a near-certain mark. Candidates who "hate genetics" almost always mean they skipped the ten practice crosses that make the routine automatic. Do the ten crosses.

The mistakes that cost the most marks

• Confusing mitosis with meiosis. The single most reliable Biology trap. Anchor it once: mitosis makes identical body cells (same chromosome number); meiosis makes gametes (halved chromosome number, with variation). Every option that swaps those properties is wrong.
• Mixing up ecological terms. Habitat vs niche, population vs community vs ecosystem, food chain vs food web. Ecology questions are vocabulary questions in disguise, learn the terms exactly.
• Guessing genetics instead of spending sixty seconds on a Punnett square.
• Learning diagrams passively. Looking at a labelled figure feels like revision; being able to reproduce the labels is the skill the exam pays for.
• Answering the "familiar" option. When two options both sound true, the question is testing a precise distinction. Slow down for five seconds and find the distinguishing word before you pick.
• Leaving blanks. There is no negative marking in the UTME. Eliminate what you can and answer everything. A blank is a guaranteed zero.

Practising Biology inside JAMB Pro

Everything this guide recommends maps directly onto the app:

• 1,207 real JAMB Biology past questions, downloadable once and then fully offline. No data needed while you practise.
• Practice mode shows a written explanation after every answer, which is exactly where the precise definitions and mitosis-vs-meiosis distinctions get learned, including on questions you guessed right.
• Year-by-year past papers with pause and resume, so you can run the multi-year sweep that makes the recurring diagrams and question shapes familiar.
• Timed CBT mock puts Biology inside a full four-subject, two-hour sitting with the real timer and question navigator, so your 25–30-minute Biology pace gets rehearsed, not assumed.
• The Progress tab tracks your per-subject accuracy, so you know from numbers, not feelings, whether Biology is a strength to maintain or the weak subject that needs double time.
• Bookmarks hold the questions that beat you (that one paramecium diagram, that cross you fumbled) for a cold retry next week.

The app is free. No sign-up, no ads.

Try one yourself

Below is a real JAMB Biology past question from 2024, laid out exactly the way the app shows it: instruction line, options, and the full explanation once you answer. Nothing to download. See how you do.

JAMB 2024 Biology

Which of the following types of biological molecules is responsible for storing genetic information?

ACarbohydrate× BProteins× CLipids× DNucleic acids✓

Check answer

Every one of the 1,207 Biology questions in JAMB Pro comes with an explanation like that, not just an answer letter. Free, offline, no ads.

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