AKU Biology Most Important Topics 2026
The top 4 AKU Biology chapters (Biodiversity and Variety of Life, Cell Structure and Function, Coordination and Control and Biological Molecules) carry about 45 percent of the 81 Biology MCQs on the AKU paper. All 21 chapters AKU examines are ranked below, with the method stated in full under the table.
Mapped from 37 solved past papers (2005 to 2025).
AKU Biology chapter frequency table
All 21 Biology chapters on the AKU syllabus, heaviest first. The subtopics under each chapter name are the ones it is most often examined on.
| # | Chapter | Expected MCQs | Share of Biology | Priority |
|---|---|---|---|---|
| 1 | Biodiversity and Variety of LifeKingdom Animalia, Kingdom Prokaryotae, Kingdom Plantae | 12.1 | 14.9% | Critical |
| 2 | Cell Structure and FunctionChromosomes, Cytoplasmic Organelles, Animal and Plant Cell | 9.8 | 12.1% | Critical |
| 3 | Coordination and ControlChemical Coordination and Hormones, Neurons and Nerve Impulse, Brain | 7.7 | 9.6% | Critical |
| 4 | Biological MoleculesProteins, Carbohydrates, Lipids | 6.5 | 8.0% | Critical |
| 5 | Support and MovementHuman Skeleton, Muscle Contraction, Joints | 4.2 | 5.1% | Important |
| 6 | InheritanceMendel's Laws of Inheritance, X-linked Recessive Inheritance, Gene Linkage and Crossing Over | 3.9 | 4.9% | Important |
| 7 | BioenergeticsCellular Respiration | 3.8 | 4.7% | Important |
| 8 | CirculationBlood Vessels, Human Heart, Lymphatic System | 3.7 | 4.6% | Important |
| 9 | DigestionHuman Digestive System | 3.7 | 4.6% | Important |
| 10 | ReproductionHuman Reproductive System, Menstrual Cycle, Sexually Transmitted Diseases | 3.6 | 4.5% | Important |
| 11 | HomeostasisKidney and Urinary System, Excretion, Thermoregulation | 3.4 | 4.2% | Important |
| 12 | EnzymesCharacteristics of Enzymes, Enzyme Inhibitors, Factors Affecting Enzyme Action | 2.9 | 3.5% | Standard |
| 13 | BiotechnologyBiotechnology and Health Care | 2.8 | 3.5% | Standard |
| 14 | Forms and Functions of PlantsPlant Nutrition and Transport, Plant Growth Regulators | 2.6 | 3.2% | Standard |
| 15 | EvolutionConcept of Evolution, Darwinism, Lamarckism | 2.1 | 2.6% | Standard |
| 16 | Man and His EnvironmentEcosystems, Pollution and Conservation | 2.0 | 2.5% | Standard |
| 17 | RespirationHuman Respiratory System, Gaseous Exchange in Lungs | 1.7 | 2.1% | Standard |
| 18 | Acellular LifeViruses, AIDS and HIV Infection | 1.6 | 2.0% | Standard |
| 19 | ImmunitySpecific Defense Mechanism | 1.2 | 1.5% | Standard |
| 20 | Growth and DevelopmentEmbryonic Development, Regeneration and Ageing | 1.2 | 1.5% | Standard |
| 21 | Introduction to BiologyLevels of Biological Organization, Major Fields of Specialization | 0.3 | 0.3% | Standard |
How this was worked out: We do not hold solved AKU papers yet. Biology on AKU examines the same chapters as ETEA MDCAT, NUMS, MDCAT, so the chapter shares measured across those 37 papers (2005 to 2025) are applied to the 81 Biology MCQs AKU actually carries. The ranking is measured; the totals are AKU's own. Once AKU papers are added here, this table is recomputed from them.
Top 10 most important Biology topics for AKU 2026
Biodiversity and Variety of Life
CriticalBiodiversity and Variety of Life is 14.9 percent of the AKU Biology paper and works out at about 12.1 MCQs on the current paper. It is examined mostly on Kingdom Animalia, Kingdom Prokaryotae and Kingdom Plantae.
Cell Structure and Function
CriticalCell Structure and Function is 12.1 percent of the AKU Biology paper and works out at about 9.8 MCQs on the current paper. It is examined mostly on Chromosomes, Cytoplasmic Organelles and Animal and Plant Cell.
Coordination and Control
CriticalCoordination and Control is 9.6 percent of the AKU Biology paper and works out at about 7.7 MCQs on the current paper. It is examined mostly on Chemical Coordination and Hormones, Neurons and Nerve Impulse and Brain.
Biological Molecules
CriticalBiological Molecules is 8.0 percent of the AKU Biology paper and works out at about 6.5 MCQs on the current paper. It is examined mostly on Proteins, Carbohydrates and Lipids.
Support and Movement
ImportantSupport and Movement is 5.1 percent of the AKU Biology paper and works out at about 4.2 MCQs on the current paper. It is examined mostly on Human Skeleton, Muscle Contraction and Joints.
Inheritance
ImportantInheritance is 4.9 percent of the AKU Biology paper and works out at about 3.9 MCQs on the current paper. It is examined mostly on Mendel's Laws of Inheritance, X-linked Recessive Inheritance and Gene Linkage and Crossing Over.
Bioenergetics
ImportantBioenergetics is 4.7 percent of the AKU Biology paper and works out at about 3.8 MCQs on the current paper. It is examined mostly on Cellular Respiration.
Circulation
ImportantCirculation is 4.6 percent of the AKU Biology paper and works out at about 3.7 MCQs on the current paper. It is examined mostly on Blood Vessels, Human Heart and Lymphatic System.
Digestion
ImportantDigestion is 4.6 percent of the AKU Biology paper and works out at about 3.7 MCQs on the current paper. It is examined mostly on Human Digestive System.
Reproduction
ImportantReproduction is 4.5 percent of the AKU Biology paper and works out at about 3.6 MCQs on the current paper. It is examined mostly on Human Reproductive System, Menstrual Cycle and Sexually Transmitted Diseases.
Every Biology chapter on the AKU syllabus
19,844 free Biology MCQs across 21 chapters, every answer explained.
AKU Biology most important topics: frequently asked questions
What are the most important Biology topics for AKU 2026?
The highest-value AKU Biology chapters are Biodiversity and Variety of Life (about 12.1 MCQs), Cell Structure and Function (about 9.8 MCQs), Coordination and Control (about 7.7 MCQs), Biological Molecules (about 6.5 MCQs) and Support and Movement (about 4.2 MCQs). Together they account for 50 percent of the 81 Biology MCQs on the AKU paper. The ranking is derived rather than counted from AKU papers; the method is stated in full on this page.
How many Biology MCQs are on the AKU paper?
Biology is worth 81 MCQs on the AKU paper as set by Aga Khan University, spread across 21 chapters. This page ranks all 21 of them by how many of those MCQs each chapter is worth.
Are these AKU Biology numbers counted from past papers?
Not from AKU papers, and this page does not claim they are. TestUstad does not hold solved AKU papers yet. Biology on AKU examines the same chapters as ETEA MDCAT, NUMS and MDCAT, so the chapter distribution measured across those 37 papers is rescaled to the 81 Biology MCQs AKU carries. The order is measured, the totals are AKU's own.
Should I skip the low-priority Biology chapters for AKU?
No. Every chapter in this table appears on the AKU paper, and AKU is decided by a handful of marks. A chapter marked Standard still costs you the marks you drop on it. Use this ranking to decide the order you study in and how long you spend on each chapter, not to cut chapters out.
Where can I practise these AKU Biology chapters?
Every chapter on this page links to its own free Biology MCQs on TestUstad, 19,844 questions across the 21 chapters AKU examines. Practice is free and unlimited with no account, and every question carries a written explanation of why the correct option is correct.