If you’re searching for MCAT sections, you’re probably not just trying to memorize four names. You’re trying to figure out what the exam actually looks like, which section feels scariest, and how to study without wasting time on the wrong things.
Here’s the clear answer: the MCAT has four multiple-choice sections: Chemical and Physical Foundations of Biological Systems, Critical Analysis and Reasoning Skills, Biological and Biochemical Foundations of Living Systems, and Psychological, Social, and Biological Foundations of Behavior. The three science sections each have 59 questions and 95 minutes, while CARS has 53 questions and 90 minutes. The exam includes 6 hours and 15 minutes of testing time, and the full seated testing experience is roughly 7.5 hours once optional breaks and tutorial time are included.
The four sections
The MCAT starts with Chemical and Physical Foundations of Biological Systems, which tests material from biochemistry, biology, general chemistry, organic chemistry, and physics. Next comes CARS, which is entirely passage-based and focuses on comprehension, reasoning within the text, and reasoning beyond the text rather than science content recall.
After that, you get Biological and Biochemical Foundations of Living Systems, which leans heavily on biology and biochemistry with smaller amounts of general chemistry and organic chemistry. The final section is Psychological, Social, and Biological Foundations of Behavior, which tests psychology, sociology, and some biology.
How the exam is built
The three science sections each include 10 passage-based sets plus 15 independent questions. CARS is different because it has 9 passage-based sets and no standalone questions.
That structure matters more than students realize. The MCAT is not just checking whether you know facts, because most of the exam is built around reading, interpreting, and applying information from passages.
What actually matters
A lot of students make the mistake of treating all four sections the same. That usually backfires because CARS rewards reading and reasoning, while the science sections reward content knowledge plus passage interpretation.
It also helps to know that the AAMC says each section includes some field-test questions that are being considered for future use and do not count toward your score. Since you cannot tell which ones those are, the smartest move is to treat every question like it counts and keep your pacing steady.
How to study smarter
The best way to study the MCAT sections is to match your prep to the structure of the exam. For the science sections, that means building strong content foundations and then practicing passage-based questions until you can apply the material under time pressure. For CARS, it means consistent passage practice, careful review, and getting comfortable reading dense material without panicking.
Real talk: most students do not need a more complicated plan. They need a plan that actually matches what the exam is asking them to do. If you want a more organized way to review all four sections without bouncing between random resources, the Complete MCAT Bundle is a natural next step because it helps turn MCAT content overload into a clearer study system.