100+ Free MCAT Practice Questions
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In a pedigree analysis, a trait appears in every generation, affects both males and females equally, and affected individuals always have at least one affected parent. Which inheritance pattern is MOST consistent with these observations?
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Key Facts: MCAT Exam
230 questions
Total MCAT Questions
AAMC MCAT Essentials 2026
472–528
Total Score Range
AAMC scoring documentation
~511.8
Average Accepted MD Applicant Score
AAMC MCAT Score data 2024–2025
$355
2026 Registration Fee
AAMC MCAT Essentials 2026
~7.5 hours
Total Time at Test Center
AAMC MCAT Essentials 2026
300–500+ hours
Recommended Study Time
AAMC and major test prep providers
The MCAT (Medical College Admission Test) is administered by the AAMC and consists of 230 questions across four sections: Chemical and Physical Foundations (59 Q, 95 min), CARS (53 Q, 90 min), Biological and Biochemical Foundations (59 Q, 95 min), and Psychological/Social/Biological Foundations (59 Q, 95 min). The total score range is 472–528, with each section scored 118–132. The average accepted MD applicant scores approximately 511.8. The 2026 exam fee is $355, administered at Pearson VUE test centers nationwide. Most applicants invest 300–500+ hours of preparation over 3–6 months.
Sample MCAT Practice Questions
Try these sample questions to test your MCAT exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.
1A protein has a pKa of 6.0 for a histidine residue in its active site. At physiological pH (7.4), what is the predominant ionization state of this histidine, and how does this affect its function as an acid-base catalyst?
2A 70 kg patient undergoes cardiac stress testing on a treadmill. During exercise, their heart rate rises from 70 to 140 bpm and stroke volume increases from 70 to 100 mL. By what factor does cardiac output increase?
3A molecule of glucose (MW = 180 g/mol) is dissolved in water. Which of the following best explains why glucose is water-soluble despite its large molecular size?
4In a buffer solution containing acetic acid (pKa = 4.76) and sodium acetate, the ratio of [CH₃COO⁻]/[CH₃COOH] is 10:1. What is the pH of this buffer?
5An enzyme follows Michaelis-Menten kinetics with Km = 2 mM and Vmax = 100 µmol/min. What is the reaction velocity when substrate concentration [S] = 2 mM?
6A physicist measures the wavelength of light emitted when a hydrogen electron falls from n=3 to n=2. Using the Rydberg formula 1/λ = R∞(1/n₁² − 1/n₂²) where R∞ = 1.097 × 10⁷ m⁻¹, what color is this spectral line (approximately)?
7A 2 kg block is pushed up a frictionless inclined plane (θ = 30°) by a horizontal force F. The block moves at constant velocity. What is the magnitude of F? (g = 10 m/s²)
8Which of the following correctly describes the relationship between Gibbs free energy (ΔG), enthalpy (ΔH), and entropy (ΔS) for a spontaneous process at constant temperature T?
9An organic compound contains a carbonyl group adjacent to an α-carbon bearing two hydrogen atoms. In an aldol condensation, which step occurs first?
10A patient's blood pressure is measured at 120/80 mmHg. If the arterial radius decreases by 50% due to atherosclerosis, what happens to resistance (assuming Poiseuille's Law applies, R ∝ 1/r⁴)?
About the MCAT Exam
The MCAT is a standardized, computer-based exam required for admission to virtually all MD and DO programs in the United States and Canada. Administered by the AAMC, it consists of 230 multiple-choice questions across four sections testing scientific knowledge, critical thinking, and analytical reasoning. The exam has been in its current format since April 2015 and remains unchanged for 2026.
Questions
230 scored questions
Time Limit
6 hours 15 minutes (testing); ~7.5 hours total with breaks
Passing Score
Score range 472–528 total; 118–132 per section; average accepted MD applicant ~511.8
Exam Fee
$355 (2026) (Association of American Medical Colleges (AAMC), delivered at Pearson VUE test centers)
MCAT Exam Content Outline
Chemical and Physical Foundations of Biological Systems
General chemistry, physics, biochemistry, organic chemistry, and biology as they apply to human physiology. Includes passage-based and discrete questions. Periodic table provided.
Critical Analysis and Reasoning Skills (CARS)
Passage-based reasoning in humanities and social sciences. 9 passages, 53 questions. No outside content knowledge required — all information needed is in the passages.
Biological and Biochemical Foundations of Living Systems
Molecular biology, cellular biology, genetics, biochemical pathways, physiology, and evolution. Heaviest emphasis on biology and biochemistry.
Psychological, Social, and Biological Foundations of Behavior
Psychology (~65%), sociology (~30%), and biology of behavior (~5%). Covers learning, cognition, emotion, development, social structures, and cultural influences on health.
How to Pass the MCAT Exam
What You Need to Know
- Passing score: Score range 472–528 total; 118–132 per section; average accepted MD applicant ~511.8
- Exam length: 230 questions
- Time limit: 6 hours 15 minutes (testing); ~7.5 hours total with breaks
- Exam fee: $355 (2026)
Keys to Passing
- Complete 500+ practice questions
- Score 80%+ consistently before scheduling
- Focus on highest-weighted sections
- Use our AI tutor for tough concepts
MCAT Study Tips from Top Performers
Frequently Asked Questions
How long is the MCAT exam?
The MCAT has 230 questions and a total testing time of 6 hours 15 minutes. Including scheduled breaks and administrative time, test-takers spend approximately 7.5 hours at the test center. The four sections are: Chem/Phys (95 min), CARS (90 min), Bio/Biochem (95 min), and Psych/Soc (95 min).
What score do you need to get into medical school?
The total MCAT score ranges from 472 to 528. The average accepted MD applicant scores approximately 511.8. A score of 515 (91st percentile) is competitive for most top-50 programs; 517+ is competitive for top-25 programs; 520+ (97th percentile) is expected at top-10 programs. The average accepted DO applicant scores approximately 503.
What is the MCAT CARS section?
Critical Analysis and Reasoning Skills (CARS) is the second section of the MCAT. It contains 9 passages drawn from humanities and social sciences (philosophy, ethics, art history, sociology, economics, etc.) and 53 questions. No prior content knowledge is required — all answers come from the passage. It tests comprehension, analysis, and reasoning ability.
How much does the MCAT cost in 2026?
The MCAT registration fee for 2026 is $355. Additional fees apply for rescheduling (up to $95), test center changes, and testing accommodations. The AAMC offers a Fee Assistance Program (FAP) for eligible low-income applicants that significantly reduces the registration fee.
How many times can you take the MCAT?
Test-takers may take the MCAT up to 3 times in a single testing year, 4 times over two consecutive years, and a maximum of 7 times in a lifetime. Medical school admissions committees typically see all scores, though most schools focus on the most recent or highest score. Retesting strategy depends on individual circumstances.
What is the best way to prepare for the MCAT?
MCAT preparation typically requires 300–500+ hours over 3–6 months. Effective strategies include: (1) completing a thorough content review of all 7 tested disciplines; (2) practicing with official AAMC materials (section banks, full-length tests) in the final 6–8 weeks; (3) daily CARS passage practice throughout preparation; (4) reviewing every incorrect answer to understand the reasoning error; and (5) simulating test-day conditions with timed full-length practice exams.