Section 3 · biology
GAMSAT biology questions
Biology is the largest single block of questions in the GAMSAT — and the one candidates most often prepare for in the wrong way, by memorising content that the exam does not ask them to recall.
The mistake worth avoiding first
Biology is 40% of Section 3, roughly 30 of 75 questions. That volume tempts people into content revision — but GAMSAT biology questions supply the biology. What they test is whether you can read an unfamiliar pathway, graph or experiment and reason from it under time pressure.
Memorising a textbook is close to the least efficient preparation available. Practising on material you have never seen is close to the most.
- 40%of Section 3 is biology
- ~30of 75 questions in a real paper
- 27original biology questions here
- 7stimulus units, as in the real exam
What ACER assumes you already know
ACER states the assumed level plainly: the first year of university studies in biology and chemistry, and A-level/Leaving Certificate/Year 12 in physics. For biology that means first-year university — not a major, and not honours-level depth.
In practice the recurring territory is cell biology, biochemistry and metabolism, genetics and inheritance, physiology and homeostasis, and enough experimental design to read a controlled study. But the operative word is assumed: anything beyond that level will be given to you in the stimulus. If a question needs an enzyme constant, a pathway diagram or a set of results, they appear in the question’s own material.
There is no official syllabus — ACER publishes none. Ours is reverse-engineered and labelled as such on the syllabus page.
What a biology question actually asks you to do
The verbs matter more than the topic.
| What it looks like | What is being tested |
|---|---|
| An unfamiliar metabolic pathway with one step inhibited | Tracing a consequence through a system you have just been shown |
| A graph of enzyme activity against pH or substrate concentration | Reading a trend, and distinguishing it from what the trend does not imply |
| A pedigree or a cross with unexpected ratios | Applying inheritance rules to a case that does not match the textbook example |
| A described experiment with a stated result | Identifying which conclusion the data supports — and which it merely permits |
| Two competing explanations for one observation | Choosing the one the evidence discriminates between |
This is why biology scores respond so poorly to content cramming and so well to timed practice: the bottleneck is almost never the biology, it is the reading and the clock. A real Section 3 gives you 2.0 minutes a question including the time spent reading the stimulus.
Sit a timed biology question set
Every biology unit in our Section 3 bank, run under a clock with a worked explanation for each item on submit. The real section interleaves all three sciences, so treat this as targeted revision rather than a simulation of exam day.
27 questions available. The real section has 75, so treat this as a diagnostic rather than a full sitting. The clock still runs the whole 150 minutes, which is deliberately generous — pace yourself against the real per-question budget rather than against the timer, or the timing practice is worthless.
Reasoning in Biological and Physical Sciences
- Questions
- 27(sample — the real section has 75)
- Time limit
- 150 min
- • No calculator, formula sheet or periodic table — as in the real exam.
- • Every constant you need appears in the question’s own material.
- • You can flag questions and return to them before submitting.
- • Scoring happens when you submit. Nothing is saved and no signup is required.
The conditions we replicate
- No calculator, as in the real exam. Every item is solvable by hand.
- No formula sheet and no periodic table.Every constant a question needs appears in that question’s own material.
- Shared stimulus units. Questions attach to a common piece of material in groups, as they do in the real section — not as isolated one-offs.
- All questions carry equal value, which is ACER’s own stated position, and nothing is deducted for a wrong answer.
- Original questions.Nothing here is transcribed from an ACER paper or another provider’s bank — see scope and limitations.
Frequently asked questions
How much of the GAMSAT is biology?
Biology is 40% of Section 3 — about 30 of its 75 questions. Since Section 3 is weighted double in ACER’s overall score, biology alone is roughly a fifth of your weighted result.
What level of biology do I need?
ACER assumes the first year of university studies in biology and chemistry, and A-level/Leaving Certificate/Year 12 in physics. Anything above that level is supplied in the question’s stimulus, so depth of recall matters far less than speed of comprehension.
Can I sit these questions untimed?
The set runs against a clock, because untimed biology practice tests a skill the exam does not assess. You can submit at any point and every item comes back with a worked explanation.
Are these real GAMSAT questions?
No, and nobody may lawfully publish those. Every item here is written from scratch to ACER’s published style and skills list. See past papers for why the PDFs circulating online are a problem.