Free MCAT Practice Test by MedLife Mastery
Realistic, free MCAT practice test with answers, thorough explanations, and analytics.
Realistic Simulation
Similar platform to what you'll see on test day, so you can get the complete MCAT testing experience.
Detailed Analytics
Identify your strengths and weaknesses with the report generated when you're finished.
Detailed Explanations
Get the reasoning behind incorrect and correct answers so you can learn the right way to answer the question.
How To Take This Free MCAT Test For Maximum Benefit
In short, treat it like the real deal.
Ready when you are .
Customers served!
1Hours spent
Customers served!
1Mentors involved
We're Meticulous
It took 31 MCAT mentors 219 hours to produce this free half-length MCAT practice exam.
What's in the free MCAT practice test
Our free practice test is a half-length MCAT that covers all four sections: Chem/Phys, CARS, Bio/Biochem and Psych/Soc. It runs in an interface built to look and work like the one you'll see on test day, with passages, discrete questions and a timer for each section. Set aside an afternoon for it, and you'll come out with a clear picture of where you stand!
When you finish, you'll get a score report for each section and explanations for every answer choice, including why the wrong ones are wrong. You can reset it and take it again whenever you like!
Try six questions from the test
Six discrete questions from the free half-length, two from each science section, one at a time the way the test feels. No account needed. Good luck!
Question 1 · Chem/Phys
For a slightly soluble salt in aqueous solution, if the ion product Qsp is less than the solubility product constant Ksp, what will happen?
The answer is C.
When Qsp is below Ksp, the solution is unsaturated. More solid dissolves, and the ion concentrations rise until Qsp = Ksp, where the solution reaches equilibrium.
Question 2 · Chem/Phys
What are the oxidation states of nitrogen and oxygen in the nitrate ion, NO3−?
The answer is B.
Oxygen is −2 in almost every compound. The exceptions are peroxides and compounds with fluorine, and nitrate is neither.
Three oxygens add up to −6, and the whole ion carries a charge of −1. So nitrogen is +5, since x + (−6) = −1 gives x = +5.
Question 3 · Bio/Biochem
During oxidative phosphorylation, protons are pumped across the inner mitochondrial membrane against their concentration gradient at each complex of the electron transport chain except which one?
The answer is B.
Complex I (NADH dehydrogenase), Complex III (cytochrome bc1) and Complex IV (cytochrome c oxidase) all pump protons, and that gradient drives ATP synthase.
Complex II (succinate dehydrogenase) passes electrons from FADH2 to ubiquinone, but it doesn't pump any protons.
Question 4 · Bio/Biochem
In glycogenolysis, which glycosidic bond does the first enzymatic step cleave, and what is the immediate product?
The answer is C.
Glycogen phosphorylase cleaves α-1,4 bonds at the non-reducing ends of glycogen and releases glucose-1-phosphate, not free glucose. Glucose-1-phosphate can later become glucose-6-phosphate.
The α-1,6 bonds sit at branch points, and the debranching enzyme breaks those. The β-1,4 bonds belong to cellulose and never appear in glycogen.
Question 5 · Psych/Soc
Which theory of emotion fits this statement best? “I am afraid because my heart is pounding very fast.”
The answer is A.
James-Lange says the body reacts first and the emotion follows from that arousal. Here the pounding heart causes the fear.
Cannon-Bard would have the fear and the pounding heart arrive at the same time, each independent of the other. Schachter-Singer needs a cognitive label on the arousal, and the statement has none. Cognitive appraisal puts the evaluation of the situation before any arousal, which is the reverse of this statement.
Question 6 · Psych/Soc
Which neuroimaging method uses radioactive tracers attached to glucose analogs to measure glucose metabolism in the brain?
The answer is C.
PET uses a radioactive glucose analog such as FDG to show how much glucose each brain region is using.
The other three measure something else. An fMRI tracks changes in blood oxygen, an EEG records electrical activity through scalp electrodes, and a CT scan builds structural images from X-rays, with no tracer involved.
Here’s how each one went. The full half-length gives you a score report for every section.
Take the full half-length, free
All four sections, including CARS, in a test-day-style interface, with a score report and explanations for every answer.
Looking for a free full-length?
We'd pair our half-length with the two free official tests from the AAMC. The AAMC Free Practice Exam is a full-length MCAT with 230 questions from past exams, and it gives you a scaled score and a percentile rank. The AAMC Free Sample Test doesn't give you a score, but you can turn your results into an estimate with our free MCAT score calculator.
Both are in the AAMC's MCAT Official Prep Hub, and you'll sign in with your AAMC account to take them. If you'd like to compare the full-lengths other companies sell, our guide to the best MCAT practice exams goes through each one.
Taking a first practice test can feel scary, and that's completely normal! Whatever score comes back, it's a starting point, and we're here to help you build from it :)
Frequently Asked Questions
About the free MCAT Practice tests
Each half-length exam has 30 questions and 5 passages per section.
We've also integrated discrete questions between the passages.
The timing aligns more closely with MCAT pacing, so it can feel more realistic.
Yes! The answer explanations go deep, especially when breaking down why the incorrect options are wrong.
Yes, you can! You have the option to retake the practice exams as many times as you'd like. You can reset the exam answers and scores after you've taken it. This will refresh the saved answers from your previous attempt, and you will have the option to take it again.
Absolutely! Our team is working hard to curate more accurate and quality FL practice exams for students to use during their test prep. Stay in the loop and get updates on future practice exams here
We're a team of 70+ future doctors who scored 515 (up to 528) on the MCAT. Over 10+ years, we've distilled strategies from hundreds of 90th+ percentile scorers into systems built for fast results - with mental health woven in, because the MCAT, just like medicine, tests the whole person.
Our goal is to help as many students as possible, not the same student for as long as possible. It's worked; hundreds of our students have gone on to score 511+ and get into medical school.
Free Resources
Mentorship Options
Connect With Us
Copyright © 2026 by MedLife Mastery Inc. All Rights Reserved.
*MCAT®, AAMC® and AAMC PREview™ are trademarks registered and/or owned by the Association of American Medical Colleges, which is not affiliated with MedLife Mastery and was not involved in the production of, and does not endorse, this website or product.