MDCAT past-paper topic frequency: what actually repeats

Students ask which topics repeat. The honest answer is that topics recur, not identical questions. Our archive lets us count how often each topic has appeared in the papers we hold. It does not let us predict your paper.

What the frequency table counts

The table has one row per topic. Questions is the number of distinct questions a topic has drawn. Papers is the number of distinct papers in which it appears. A question reused in two papers counts once under Questions and twice under Papers.

The archive covers six boards and papers from 2000 to 2026. It is built from the papers in our collection, not from every paper ever set. Some older papers are partial, and the paper row shows how many questions were recovered.

That distinction matters. A count of 484 means 484 distinct questions in our archive, not 484 questions in every paper. It is evidence of past attention, not a forecast.

The difference between Questions and Papers is useful. A topic with 100 questions across 80 papers appeared in many papers but with few questions each. A topic with 100 questions across 20 papers appeared in fewer papers but with more questions each time. Both can be heavy; they are heavy in different ways.

The six boards in the archive

The boards are Balochistan, DUHS, Federal, KMU, NUMS and UHS. Each paper is tagged by board and year, then each question is mapped to a topic.

The board mix is uneven. Some boards have more papers in the archive than others, and some years are incomplete. A topic can have a high count because it appeared in many papers, not because it appeared many times in one paper.

Use the board column when you are preparing for a specific paper. A topic that appears across all six boards is a safer revision bet than a topic that appears in one.

Biology: cell structure leads the table

Cell Types and Organization has 484 questions across 93 papers. Organelles and Their Roles has 284 across 82. Mendelian Genetics has 212 across 81. Photosynthesis and Energy Capture has 205 across 72. Digestive System Anatomy and Secretions has 184 across 76.

Those five sit at the top of the Biology table. The chapter column matters as much as the topic column. Cell Types and Organelles are both in Cell Structure and Function, which makes that chapter the first place to spend time.

The counts fall gradually after the top five. Skeletal System, Theories of Evolution, Cellular Respiration and Carbohydrates and Lipids all sit in the 150 to 180 range. A topic with 150 questions is still heavy.

Chemistry: atomic structure and the mole

Electronic Configuration and Periodic Trends has 220 questions across 84 papers. Stoichiometry and the Mole Concept has 187 across 80. Periodic Trends and Classification has 168 across 70. Solution Equilibrium has 145 across 75. Reaction Rates and Rate Laws has 134 across 73.

The first two are different kinds of work. Electronic configuration is a rules-and-exceptions topic. Stoichiometry is a method that appears inside other chapters. Practise the method until it is automatic, then apply it in equilibrium and gas questions.

Gas Laws and Ideal Gas Equation has 133 questions across 68 papers. Enthalpy and Calorimetry has 115 across 70. Crystalline Solids has 115 across 66. The physical chemistry block is broad, not one chapter deep.

Physics: circuits and waves

Ohm's Law and DC Circuits has 257 questions across 84 papers. Wave Motion and Classification has 231 across 85. Nuclear Structure and Radioactivity has 214 across 80. Work, Power and Forms of Energy has 213 across 79. Newton's Laws of Motion has 172 across 78.

Kinematics has 136 across 70, and Quantum Theory and Photoelectric Effect has 135 across 71. Coulomb's Law and Electric Field has 131 across 67. First Law of Thermodynamics has 122 across 65.

The Physics table is top-heavy in mechanics, electricity and waves. Modern physics is smaller per topic but has several topics, so it adds up. Read the chapter column before you decide that a chapter is small.

English and logical reasoning: small counts, high value

Vocabulary and Contextual Meaning has 700 questions across 94 papers, the largest single count in the archive. Grammar Fundamentals and Sentence Structure has 657 across 92. Reading Comprehension and Analysis has 56 across 26.

In Logical Reasoning, Pattern Recognition in Sequences has 37 questions across 20 papers. Logical Puzzle Solving has 30 across 20. Causal Relationships and Reasoning has 22 across 18. Syllogisms and Venn Diagrams has 19 across 15.

The English counts are large because vocabulary and grammar questions are short and appear in most papers. The Logical Reasoning counts are smaller because the section itself is small. Neither count makes the section optional. The marks are 9 and 9, and they count the same as any other mark.

Reading Comprehension has only 56 questions across 26 papers, but a passage question can take much longer than a vocabulary item. The count measures how often a topic appears, not how long it takes. Plan the section by time as well as by count.

How to use the counts without predicting the paper

Start with the chapters that have high counts and recent appearances. A chapter with 200 questions and a 2026 row is a better use of an hour than a chapter with 20 questions and an old last appearance.

Then check your own error log. A high-count chapter you already answer well does not need another week. A lower-count chapter that keeps producing errors does.

Use the counts to allocate time, not to skip content. A topic absent from the table has not appeared in the papers we hold, but it may still be in the syllabus. The syllabus decides what can be examined. The archive only shows what has been.

A three-step method for your own analysis

First, list the chapters in the official syllabus for one subject. Second, write the archive count and the most recent year beside each chapter. Third, mark the chapters with a high count and a recent year, then put them in the next two weeks.

For the remaining chapters, give them one session each in a later pass. Do not delete them. The exam can ask a question from a chapter that has been quiet for a few years.

Repeat the method for each subject. The whole exercise takes about an hour and gives you a revision order you can defend.

For a two-week block, give most sessions to the chapters at the top of your list and one session to a chapter you have neglected. The exact split depends on your error log and the time you have. The point is to make the choice explicit, not to follow a formula.

Limits of this data

The archive is not the full history of the MDCAT. It holds six boards, some papers are partial and the recovery count varies. A missing question is a missing count, not proof that the topic was absent.

The counts do not tell you the difficulty of your paper, the number of questions from a chapter, or the order of the sections. They do not replace the official syllabus or a teacher.

The difficulty column in the source table summarises the questions we hold. It is not a difficulty rating for your paper, and a low summary does not mean the topic is easy for you. Use it as a prompt to check the chapter, not as a label.

Read them as a map of past attention. Use them with practice, the past papers and your own error log. For the method behind the numbers, see the methodology page.