NEET Biology · Syllabus 2026
NEET Biology Syllabus 2026 — Chapter-Wise with Sub-Topics & Priority
The complete NEET 2026 Biology syllabus — every chapter across Class 11 (Botany + Animal Kingdom + Cell Structure + Plant Physiology + Human Physiology) and Class 12 (Genetics + Reproduction + Biotechnology + Ecology). Each chapter tagged with 10-year weightage, priority tier and the NCERT sub-sections NTA tests most often.
Biology carries 360 of the 720 NEET marks — it is the single biggest rank lever. This syllabus is NCERT-first: every chapter maps directly to specific Class 11 or Class 12 NCERT sections, and NTA questions are derived from those pages. Master them and you move past the 330+ Biology threshold that separates MBBS-admitted candidates from everyone else.
Priority Tiers — How to Read This Syllabus
Anchor chapters — score decider
~4–6% weightage. NCERT line-level recall + chapter-wise PYQs. Genetics, Physiology, Reproduction chapters dominate this tier.
Strong secondary block
3–4% weightage. NCERT + 40 PYQs. Most Physiology and Biology-Human-Welfare chapters sit here.
Minimum pass
2% weightage. NCERT reading + 20 PYQs. Short chapters with predictable questions — 4 marks expected each.
Biology Syllabus — Chapter-Wise with Sub-Topics & Priority
| Chapter | Weightage (approx) | Priority | Key Sub-Topics |
|---|---|---|---|
| The Living World | 2% | P3 | Biological classification, taxonomy, nomenclature, taxa, herbarium |
| Biological Classification | 3% | P2 | 5-kingdom classification, Monera, Protista, Fungi, viruses & viroids |
| Plant Kingdom | 3% | P2 | Algae, bryophytes, pteridophytes, gymnosperms, angiosperms, life cycles |
| Animal Kingdom | 4% | P1 | Classification of animals, phylum characteristics, symmetry, coelom, notochord |
| Morphology of Flowering Plants | 3% | P2 | Root, stem, leaf, flower, inflorescence, fruit types, floral formula |
| Anatomy of Flowering Plants | 3% | P2 | Plant tissues, tissue systems, dicot/monocot root/stem anatomy, secondary growth |
| Structural Organisation in Animals | 2% | P3 | Epithelial/connective/muscular/nervous tissues, morphology of earthworm, cockroach, frog |
| Cell: The Unit of Life | 4% | P1 | Cell theory, prokaryotic vs eukaryotic, cell organelles, nucleus, chromosomes |
| Biomolecules | 3% | P2 | Carbohydrates, lipids, proteins, enzymes, nucleic acids, primary/secondary metabolites |
| Cell Cycle & Cell Division | 3% | P2 | Cell cycle phases, mitosis, meiosis, significance of meiosis |
| Transport in Plants | 2% | P3 | Water absorption, transpiration, phloem transport, pressure-flow hypothesis |
| Mineral Nutrition | 2% | P3 | Essential elements, deficiency symptoms, nitrogen cycle, biological N-fixation |
| Photosynthesis in Higher Plants | 4% | P1 | Light & dark reactions, C3/C4 pathways, photorespiration, Calvin cycle, factors affecting |
| Respiration in Plants | 3% | P2 | Glycolysis, Krebs cycle, ETS, oxidative phosphorylation, RQ, fermentation |
| Plant Growth & Development | 3% | P2 | Phases of growth, plant hormones (auxins, gibberellins, cytokinins, ABA, ethylene), photoperiodism, vernalisation |
| Digestion & Absorption | 3% | P2 | Digestive system, enzymes, absorption mechanisms, disorders |
| Breathing & Exchange of Gases | 3% | P2 | Respiratory system, gas transport, oxygen dissociation curve, respiratory disorders |
| Body Fluids & Circulation | 3% | P2 | Blood composition, heart, cardiac cycle, ECG, double circulation, disorders |
| Excretory Products & Elimination | 3% | P2 | Nephron structure, urine formation, counter-current mechanism, dialysis |
| Locomotion & Movement | 3% | P2 | Types of movement, skeletal system, muscle contraction (sliding filament), joints |
| Neural Control & Coordination | 3% | P2 | Neuron structure, nerve impulse, synapse, CNS, PNS, reflex action |
| Chemical Coordination & Integration | 3% | P2 | Endocrine glands, hormones, mechanism of hormone action, disorders |
| Reproduction in Organisms | 2% | P3 | Asexual & sexual reproduction, reproductive events |
| Sexual Reproduction in Flowering Plants | 4% | P1 | Flower structure, pollination, double fertilisation, embryo & endosperm, apomixis, polyembryony |
| Human Reproduction | 4% | P1 | Male/female reproductive systems, gametogenesis, menstrual cycle, fertilisation, placenta, parturition |
| Reproductive Health | 2% | P3 | Contraception, STDs, infertility, IVF, MTP |
| Principles of Inheritance & Variation | 5% | P1 | Mendel's laws, chromosomal theory, linkage, pedigree analysis, genetic disorders |
| Molecular Basis of Inheritance | 6% | P1 | DNA structure, replication, transcription, translation, genetic code, regulation of gene expression, human genome project |
| Evolution | 3% | P2 | Origin of life, theories of evolution, Hardy-Weinberg principle, speciation, human evolution |
| Human Health & Disease | 4% | P1 | Pathogens, immune system, HIV/AIDS, cancer, drug abuse, allergies |
| Microbes in Human Welfare | 2% | P3 | Microbes in food production, sewage treatment, biogas, biocontrol agents, biofertilisers |
| Strategies for Enhancement in Food Production | 2% | P3 | Animal husbandry, plant breeding, tissue culture, single cell protein |
| Biotechnology: Principles & Processes | 3% | P2 | Recombinant DNA technology, restriction enzymes, PCR, gel electrophoresis, cloning vectors |
| Biotechnology & Its Applications | 3% | P2 | GM crops, Bt cotton, RNAi, gene therapy, transgenic animals, molecular diagnostics |
| Organisms & Populations | 2% | P3 | Population attributes, population growth, species interactions, adaptations |
| Ecosystem | 3% | P2 | Structure & function, productivity, decomposition, energy flow, biogeochemical cycles |
| Biodiversity & Conservation | 2% | P3 | Biodiversity patterns, loss of biodiversity, hotspots, IUCN categories, conservation strategies |
| Environmental Issues | 2% | P3 | Air/water/soil pollution, greenhouse effect, ozone depletion, solid waste management |
Key Insights for Biology Syllabus Planning
- Genetics + Molecular Biology = 11% combined. Two chapters, ~80 marks worth of impact over the full NEET paper. Over-invest here.
- Human Physiology block = 18%. Seven chapters (Digestion → Locomotion → Neural → Chemical Coordination). A NEET candidate cannot afford weak Physiology.
- Reproduction block = 12%. Sexual Reproduction in Plants + Human Reproduction are both P1 chapters. Diagrams and cycles — drawable from memory.
- NCERT-line recall is the game. A large share of NEET Biology is a direct NCERT line or close paraphrase. Coaching summaries underperform NCERT reading for this exam specifically.
- Ecology & Environmental chapters are P3 but free marks. Combined ~10% weightage, low prep cost, predictable question style.
Recommended Study Order
- 1Block 1 — Genetics core (3 weeks): Principles of Inheritance → Molecular Basis of Inheritance → Evolution. Highest-weightage block, most rank-predictive.
- 2Block 2 — Human Physiology (5 weeks): Digestion → Breathing → Circulation → Excretion → Locomotion → Neural → Chemical Coordination. Seven chapters, one per week.
- 3Block 3 — Reproduction (2 weeks): Sexual Reproduction in Plants + Human Reproduction + Reproductive Health.
- 4Block 4 — Cell & Plant Physiology (3 weeks): Cell, Biomolecules, Cell Cycle, Photosynthesis, Respiration, Plant Growth. Foundational for everything else.
- 5Block 5 — Diversity + Biotech (2 weeks): Plant/Animal Kingdom, Biological Classification, Biotechnology (both chapters), Human Health & Disease.
- 6Block 6 — Ecology + Coverage sweep (1–2 weeks): Ecosystem, Biodiversity, Environmental Issues, Microbes, Food Production, Transport in Plants, Mineral Nutrition, remaining chapters.
Related NEET Practice
Frequently asked questions
Is NCERT enough for NEET Biology?
Yes — for Biology specifically, NCERT Class 11 + 12 is sufficient if read 3+ times with chapter PYQs for reinforcement. NTA derives Biology questions directly from NCERT lines. Coaching summaries are a poor substitute because they lose NCERT phrasing.
How many Biology chapters should I focus on if short on time?
The 7 P1 chapters (Molecular Basis of Inheritance, Principles of Inheritance, Human Reproduction, Sexual Reproduction in Plants, Photosynthesis, Cell, Animal Kingdom, Human Health & Disease) together carry ~30%. Master these before anything else.
Do I need to memorise every diagram?
Yes for the standard NEET diagrams: mitosis/meiosis stages, heart circulation, nephron, Calvin cycle, plant anatomy cross-sections, nerve impulse, DNA replication. Drawable from memory — NTA asks identification and labelling questions.
How is weightage calculated?
Weightage is the 10-year average share of Biology marks (2015–2025) across NEET and previous AIPMT papers, normalised. The numbers hold within ±1–2 percentage points session-to-session.
Should I combine Biology with Physics & Chemistry prep?
Yes — NEET demands balanced preparation. Aim for 40% of study time on Biology, 30% Chemistry, 30% Physics. Biology compounds fastest, so front-load it in the first few months, then balance.
Start Biology prep on the right chapter
Genetics drives the highest rank return per hour. Pick Molecular Basis of Inheritance, attempt chapter PYQs with NCERT-linked solutions, free.
Practise Biology PYQs