Medical entrance exams compared

GAMSAT vs MCAT Biology 2026Section III vs B/B, Scoring & Which to Take

Two exams, two hemispheres, one goal: medical school. The MCAT's Biological and Biochemical Foundations section (B/B) tests deep content knowledge through passage-based questions. GAMSAT's Section III tests scientific reasoning across biology, chemistry, and physics with an emphasis on applying principles to unfamiliar data. Choosing between them depends primarily on where you want to study medicine.

This guide compares the biology components of both exams — format, content depth, scoring, accepted countries, and whether dual-prep is feasible.

Full comparison

Every significant difference between GAMSAT and MCAT biology assessment.

Dimension	GAMSAT	MCAT
Full exam name	Graduate Australian Medical School Admissions Test (GAMSAT)	Medical College Admission Test (MCAT)
Biology-relevant section	Section III: Reasoning in Biological and Physical Sciences. 75 MCQ in 150 minutes (2 min/question). Biology accounts for approximately 40% of Section III (roughly 30 questions).	Biological and Biochemical Foundations of Living Systems (B/B). 59 questions in 95 minutes (passage-based MCQ + discrete MCQ). Nearly 100% biology and biochemistry content.
Other sections	Section I: Reasoning in Humanities and Social Sciences (75 MCQ, 100 min). Section II: Written Communication (2 essays, 60 min).	Chemical and Physical Foundations (C/P, 59Q), Psychological/Social/Biological Foundations (P/S, 59Q), Critical Analysis and Reasoning Skills (CARS, 53Q).
Total exam length	Approximately 5 hours 15 minutes (including breaks).	Approximately 7 hours 30 minutes (including breaks).
Scoring	Each section scored 0-100. Overall score is weighted average (Section I: 25%, Section II: 25%, Section III: 50%). Competitive score: 60-65+.	Each section scored 118-132. Total 472-528. Competitive score: 510+ (80th percentile) for US MD schools.
Countries accepted	Australia (most graduate-entry medical schools), Ireland (RCSI, UCD, UCC, UL, TCD), UK (select graduate-entry programmes: Nottingham, St George, Swansea).	United States (all MD and DO schools), Canada (all medical schools), Caribbean medical schools. Some Australian and UK schools accept MCAT as an alternative.
Biology content depth	First-year university biology and chemistry. Emphasis on reasoning from unfamiliar data rather than recall. Questions often present a research scenario and ask you to apply principles.	First-year biology + biochemistry + introductory physiology. Passage-based format tests reading comprehension of scientific literature alongside content knowledge. More content-heavy than GAMSAT.
Prerequisite knowledge	No formal prerequisites, but equivalent of 1 year university biology and 1 year university chemistry expected. Organic chemistry is tested.	AAMC recommends 2 semesters each of introductory biology, general chemistry, organic chemistry, biochemistry, and physics. Plus introductory psychology and sociology.

Biology content overlap between GAMSAT and MCAT

Shared content (~70%)

*Cell biology: membrane structure, transport, organelles, cell cycle
*Molecular genetics: DNA replication, transcription, translation, gene regulation
*Metabolism: glycolysis, Krebs cycle, oxidative phosphorylation, photosynthesis
*Human physiology: cardiovascular, respiratory, nervous, endocrine systems
*Biochemistry: amino acids, protein structure, enzyme kinetics, lipid biology
*Mendelian genetics, Hardy-Weinberg, evolution, population genetics

Exam-specific content

MCAT-specific (not heavily tested on GAMSAT)

- Detailed biochemistry (amino acid properties, metabolic regulation, Michaelis-Menten kinetics)
- Psychology and sociology (entire P/S section)
- Passage-based experimental analysis at research-paper depth

GAMSAT-specific (not heavily tested on MCAT)

- Section II essay writing (humanities reasoning)
- Physics integrated into Section III biology questions
- Reasoning from completely novel data (less reliance on memorised content)

Difficulty comparison

Content load

MCAT requires more sheer content memorisation. The AAMC content outline is extensive — detailed biochemistry, amino acid properties, metabolic pathways, and organ system physiology. GAMSAT tests less content breadth but expects you to reason through unfamiliar applications of that content.

Reasoning demand

GAMSAT Section III is more reasoning-intensive per question. You are often given a data set or scenario you have never seen and asked to apply basic principles. MCAT passages also require reasoning, but the content is more predictable — you can anticipate the types of questions from the passage topic.

Time pressure

GAMSAT Section III gives 2 minutes per question. MCAT B/B gives approximately 1 minute 37 seconds per question, but questions are grouped in passages that require initial reading time. Effective per-question time is similar. Both exams penalise slow readers.

Verdict: which should you take?

Take GAMSAT if...

+You are targeting graduate-entry medicine in Australia, Ireland, or UK
+You come from a non-science undergraduate background (GAMSAT is less content-heavy)
+You are a strong analytical reasoner who can work with unfamiliar data
+You are comfortable with essay writing (Section II)

Take MCAT if...

+You are targeting US or Canadian medical schools (MCAT is required)
+You have a strong science undergraduate background and prefer content-based exams
+You want maximum flexibility (MCAT is accepted more broadly worldwide)
+You are willing to invest in comprehensive content review (3-6 months)

Dual-prep strategy: if you are applying to both US and Australian medical schools, prepare for the MCAT first (it has the higher content ceiling), then use that foundation for GAMSAT Section III. Add 4-6 weeks for GAMSAT-specific reasoning practice and Section II essay writing. The biology content transfers directly.

Frequently Asked Questions

Is GAMSAT harder than MCAT?

They are difficult in different ways. GAMSAT Section III is more reasoning-heavy — questions often present unfamiliar research scenarios and ask you to apply first principles rather than recall specific facts. The MCAT Biological and Biochemical Foundations section (B/B) is more content-heavy — you need to know more specific biology and biochemistry, but the questions are more predictable in format. Students with strong analytical reasoning but less content background often find GAMSAT more natural. Students who prefer structured content mastery often find MCAT more approachable. Overall difficulty is comparable; preparation time is similar (3-6 months of dedicated study).

Can MCAT scores transfer to GAMSAT-accepting schools?

Some Australian medical schools (e.g., University of Sydney, Monash) accept MCAT scores as an alternative to GAMSAT. In Ireland and the UK, GAMSAT is generally required — MCAT is not accepted. If you are applying to both US and Australian medical schools, check individual programme requirements. Taking the MCAT and applying to Australian schools that accept it can save you from sitting two separate exams.

Which has more biology content — GAMSAT or MCAT?

The MCAT tests significantly more biology content. The B/B section alone has 59 questions that are almost entirely biology and biochemistry. GAMSAT Section III mixes biology with chemistry and physics, with biology accounting for roughly 40% of 75 questions (approximately 30 biology questions). However, GAMSAT biology questions tend to be more reasoning-intensive — you are given novel data and expected to reason through it, rather than recall a specific pathway or mechanism.

Which is best for UK medical school?

For UK graduate-entry medicine (GEM) programmes, GAMSAT is the standard requirement. Nottingham, St George (London), Swansea, and several Irish medical schools require GAMSAT. Undergraduate-entry UK medical schools use UCAT or BMAT instead. MCAT is not accepted by UK medical schools. If you are targeting UK graduate-entry medicine specifically, prepare for GAMSAT.

Can you prep for both GAMSAT and MCAT simultaneously?

Yes, with caveats. The biology and chemistry content overlaps substantially — Campbell Biology, Lehninger Biochemistry, and introductory organic chemistry serve both exams. The key differences are: (1) MCAT requires more psychology/sociology content (not tested on GAMSAT), (2) GAMSAT Section II requires essay writing (not tested on MCAT), and (3) GAMSAT emphasises reasoning from novel data while MCAT emphasises passage-based content recall. A dual-prep strategy works best if you allocate 3-4 months for shared content, then 4-6 weeks for exam-specific practice. We coach both pathways in parallel.

Related guides

GAMSAT Section III Biology Prep

Reasoning-based biology coaching for GAMSAT

MCAT Biology Preparation

B/B section coaching with passage-based practice