NUMS Biology Most Important Topics 2026
The top 4 NUMS Biology chapters (Cell Structure and Function, Biodiversity and Variety of Life, Coordination and Control and Biological Molecules) carry about 45 percent of the 55 Biology MCQs on the NUMS paper. That ranking comes from counting every Biology MCQ in the 10 solved NUMS past papers on TestUstad, 711 questions in total, and matching each one to the chapter it tests.
10 solved NUMS past papers analysed (2014 to 2023).
NUMS Biology chapter frequency table
All 20 Biology chapters on the NUMS 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 | Cell Structure and FunctionChromosomes, Cytoplasmic Organelles, Animal and Plant Cell | 8.7 | 15.8% | Critical |
| 2 | Biodiversity and Variety of LifeKingdom Animalia, Kingdom Prokaryotae, Kingdom Fungi | 6.8 | 12.4% | Critical |
| 3 | Coordination and ControlChemical Coordination and Hormones, Neurons and Nerve Impulse, Receptors | 4.9 | 8.9% | Critical |
| 4 | Biological MoleculesBiological Importance of Water, Proteins, Carbohydrates | 4.3 | 7.7% | Critical |
| 5 | CirculationBlood Vessels, Human Heart, Lymphatic System | 3.8 | 6.9% | Important |
| 6 | DigestionHuman Digestive System | 3.6 | 6.5% | Important |
| 7 | Support and MovementMuscles, Human Skeleton, Muscle Contraction | 2.9 | 5.3% | Important |
| 8 | HomeostasisKidney and Urinary System, Thermoregulation, Excretion | 2.6 | 4.6% | Important |
| 9 | ReproductionHuman Reproductive System, Menstrual Cycle, Sexually Transmitted Diseases | 2.4 | 4.4% | Important |
| 10 | InheritanceX-linked Recessive Inheritance, Gene Linkage and Crossing Over | 2.2 | 4.1% | Important |
| 11 | EnzymesEnzyme Inhibitors, Factors Affecting Enzyme Action | 1.9 | 3.5% | Standard |
| 12 | EvolutionConcept of Evolution, Darwinism, Lamarckism | 1.8 | 3.2% | Standard |
| 13 | Forms and Functions of PlantsPlant Nutrition and Transport | 1.5 | 2.7% | Standard |
| 14 | RespirationHuman Respiratory System, Gaseous Exchange in Lungs, Effects of Smoking | 1.5 | 2.7% | Standard |
| 15 | BioenergeticsCellular Respiration | 1.4 | 2.5% | Standard |
| 16 | Acellular LifeViruses, AIDS and HIV Infection | 1.2 | 2.1% | Standard |
| 17 | Man and His EnvironmentEcosystems, Pollution and Conservation | 1.2 | 2.1% | Standard |
| 18 | Growth and DevelopmentEmbryonic Development, Regeneration and Ageing | 0.9 | 1.7% | Standard |
| 19 | BiotechnologyBiotechnology and Health Care | 0.9 | 1.5% | Standard |
| 20 | ImmunitySpecific Defense Mechanism | 0.8 | 1.4% | Standard |
How this was worked out: Every MCQ in the 10 solved NUMS papers we hold (2014 to 2023) was matched to the chapter it tests, which is how the share column is worked out. These are counts of real questions from real NUMS MDCAT papers, not an opinion about which chapters matter. The MCQ column then applies each chapter's share to the 55 Biology MCQs the current NUMS pattern carries, rather than averaging the raw counts: those older papers were set to different totals, and a number taken straight off them would describe a paper nobody is sitting any more.
Top 10 most important Biology topics for NUMS 2026
Cell Structure and Function
CriticalCell Structure and Function is 15.8 percent of the NUMS Biology paper and works out at about 8.7 MCQs on the current paper. It is examined mostly on Chromosomes, Cytoplasmic Organelles and Animal and Plant Cell.
Biodiversity and Variety of Life
CriticalBiodiversity and Variety of Life is 12.4 percent of the NUMS Biology paper and works out at about 6.8 MCQs on the current paper. It is examined mostly on Kingdom Animalia, Kingdom Prokaryotae and Kingdom Fungi.
Coordination and Control
CriticalCoordination and Control is 8.9 percent of the NUMS Biology paper and works out at about 4.9 MCQs on the current paper. It is examined mostly on Chemical Coordination and Hormones, Neurons and Nerve Impulse and Receptors.
Biological Molecules
CriticalBiological Molecules is 7.7 percent of the NUMS Biology paper and works out at about 4.3 MCQs on the current paper. It is examined mostly on Biological Importance of Water, Proteins and Carbohydrates.
Circulation
ImportantCirculation is 6.9 percent of the NUMS Biology paper and works out at about 3.8 MCQs on the current paper. It is examined mostly on Blood Vessels, Human Heart and Lymphatic System.
Digestion
ImportantDigestion is 6.5 percent of the NUMS Biology paper and works out at about 3.6 MCQs on the current paper. It is examined mostly on Human Digestive System.
Support and Movement
ImportantSupport and Movement is 5.3 percent of the NUMS Biology paper and works out at about 2.9 MCQs on the current paper. It is examined mostly on Muscles, Human Skeleton and Muscle Contraction.
Homeostasis
ImportantHomeostasis is 4.6 percent of the NUMS Biology paper and works out at about 2.6 MCQs on the current paper. It is examined mostly on Kidney and Urinary System, Thermoregulation and Excretion.
Reproduction
ImportantReproduction is 4.4 percent of the NUMS Biology paper and works out at about 2.4 MCQs on the current paper. It is examined mostly on Human Reproductive System, Menstrual Cycle and Sexually Transmitted Diseases.
Inheritance
ImportantInheritance is 4.1 percent of the NUMS Biology paper and works out at about 2.2 MCQs on the current paper. It is examined mostly on X-linked Recessive Inheritance and Gene Linkage and Crossing Over.
Every Biology chapter on the NUMS syllabus
19,844 free Biology MCQs across 20 chapters, every answer explained.
NUMS Biology most important topics: frequently asked questions
What are the most important Biology topics for NUMS 2026?
The highest-value NUMS Biology chapters are Cell Structure and Function (about 8.7 MCQs), Biodiversity and Variety of Life (about 6.8 MCQs), Coordination and Control (about 4.9 MCQs), Biological Molecules (about 4.3 MCQs) and Circulation (about 3.8 MCQs). Together they account for 52 percent of the 55 Biology MCQs on the NUMS paper. The ranking comes from counting every Biology MCQ in the 10 solved NUMS past papers on TestUstad.
How many Biology MCQs are on the NUMS paper?
Biology is worth 55 MCQs on the NUMS paper as set by National University of Medical Sciences, spread across 20 chapters. This page ranks all 20 of them by how many of those MCQs each chapter is worth.
Where does this NUMS Biology ranking come from?
From 10 solved NUMS past papers held on TestUstad, covering 2014 to 2023. Every Biology MCQ in them, 711 questions in total, is tagged to the chapter it tests, which is where each chapter's share comes from. The expected MCQ counts apply that share to the 55 Biology MCQs the current NUMS pattern carries. You can open any of those papers and check.
Should I skip the low-priority Biology chapters for NUMS?
No. Every chapter in this table appears on the NUMS paper, and NUMS 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 NUMS Biology chapters?
Every chapter on this page links to its own free Biology MCQs on TestUstad, 19,844 questions across the 20 chapters NUMS examines. Practice is free and unlimited with no account, and every question carries a written explanation of why the correct option is correct.