NEET 2026 Biology — Hot Topics Analysis based on 2021–2025 paper trends. Biology is the highest-weight subject in NEET with 360 marks (90 questions) — half the total exam. It is split equally: 45 questions Botany + 45 questions Zoology. About 70–80% of Biology questions come from Class 12. These 25 chapters cover 80%+ of the expected paper.
NEET 2026 exam date: May 3, 2026. Total marks: 720. Negative marking: -1 per wrong answer.
Hot Topics Ranked by Weightage (2021–2025)
Molecular Basis of Inheritance — 8.79% weightage (Class 12, Botany)
Key concepts: DNA structure, replication, transcription, translation, genetic code, lac operon, Human Genome Project
Question pattern: Experiments (Meselson-Stahl, Hershey-Chase), central dogma. 6-7 questions.
Biotechnology — Principles and Processes — 6.60% weightage (Class 12, Zoology)
Key concepts: rDNA technology, restriction enzymes, cloning vectors, PCR, gel electrophoresis
Question pattern: Tool identification, process steps, applications. 4-5 questions.
Animal Kingdom — 5.49% weightage (Class 11, Zoology)
Key concepts: Classification, chordates vs non-chordates, phylum characteristics, examples
Question pattern: Phylum-based questions, identifying features. 4-5 questions.
Human Health and Disease — 5.06% weightage (Class 12, Zoology)
Key concepts: Pathogens, immunity, AIDS, cancer, drugs, vaccines
Question pattern: Disease-pathogen matching, immune response. 4-5 questions.
Sexual Reproduction in Flowering Plants — 4.84% weightage (Class 12, Botany)
Key concepts: Pre-fertilization, double fertilization, embryo, endosperm, apomixis, polyembryony
Question pattern: Embryo sac structure, post-fertilization events. 4 questions.
Cell Cycle and Cell Division — 4.84% weightage (Class 11, Botany)
Key concepts: Mitosis, meiosis, phases, significance, checkpoints
Question pattern: Phase identification, chromosome number, comparisons. 4 questions.
Principles of Inheritance and Variation — 4.84% weightage (Class 12, Botany)
Key concepts: Mendel’s laws, linkage, sex determination, pedigree, chromosomal disorders
Question pattern: Monohybrid/dihybrid crosses, pedigree analysis. 4 questions.
Human Reproduction — 4.62% weightage (Class 12, Zoology)
Key concepts: Male/female reproductive systems, gametogenesis, menstrual cycle, fertilization, pregnancy
Question pattern: Hormone roles, process sequence. 4 questions.
Biomolecules — 4.40% weightage (Class 11, Zoology)
Key concepts: Carbohydrates, proteins, enzymes, nucleic acids, lipids
Question pattern: Classification, enzyme kinetics, bond types. 4 questions.
Structural Organisation in Animals — 4.18% weightage (Class 11, Zoology)
Key concepts: Tissues, earthworm, cockroach, frog anatomy
Question pattern: Tissue identification, organ systems. 3-4 questions.
Morphology of Flowering Plants — 3.52% weightage (Class 11, Botany)
Key concepts: Root, stem, leaf, inflorescence, flower, fruit, seed, floral diagrams
Question pattern: Aestivation, placentation, family identification. 3 questions.
Ecosystem — 3.5% weightage (Class 12, Botany)
Key concepts: Productivity, decomposition, energy flow, food chain, nutrient cycles
Question pattern: Pyramids of number/biomass/energy, 10% law. 3 questions.
Anatomy of Flowering Plants — 3.30% weightage (Class 11, Botany)
Key concepts: Plant tissues, monocot/dicot anatomy, secondary growth
Question pattern: Tissue identification, vascular bundles. 3 questions.
Cell: The Unit of Life — 3.30% weightage (Class 11, Botany)
Key concepts: Prokaryotic/eukaryotic cells, organelles, cell wall, membrane
Question pattern: Organelle functions, cell type comparisons. 3 questions.
Biotechnology and Its Applications — 3.2% weightage (Class 12, Zoology)
Key concepts: GM crops, Bt cotton, RNAi, gene therapy, molecular diagnostics, insulin production
Question pattern: Application-based questions, transgenic organisms. 2-3 questions.
Biodiversity and Conservation — 3.0% weightage (Class 12, Botany)
Key concepts: Levels of biodiversity, hotspots, IUCN categories, in-situ and ex-situ conservation
Question pattern: Hotspot identification, conservation strategies. 2-3 questions.
Plant Kingdom — 3.0% weightage (Class 11, Botany)
Key concepts: Algae, bryophytes, pteridophytes, gymnosperms, angiosperms — life cycles
Question pattern: Alternation of generations, classification. 2-3 questions.
Photosynthesis in Higher Plants — 2.9% weightage (Class 11, Botany)
Key concepts: Light/dark reactions, C3 vs C4, photorespiration, Calvin cycle
Question pattern: Process-based questions, experiment identification. 2-3 questions.
Evolution — 2.9% weightage (Class 12, Zoology)
Key concepts: Theories, Hardy-Weinberg, human evolution, adaptive radiation
Question pattern: Hardy-Weinberg problems, evidence. 2-3 questions.
Reproductive Health — 2.8% weightage (Class 12, Zoology)
Key concepts: Population, contraceptives, MTP, STIs, infertility, ART
Question pattern: Contraceptive methods, ART procedures. 2 questions.
Microbes in Human Welfare — 2.5% weightage (Class 12, Zoology)
Key concepts: Microbes in food, industry, sewage treatment, biogas, biocontrol
Question pattern: Microbe-product matching. 2 questions.
Organisms and Populations — 2.5% weightage (Class 12, Botany)
Key concepts: Population attributes, growth models, interactions, adaptations
Question pattern: Exponential/logistic growth, interaction types. 2 questions.
Body Fluids and Circulation — 2.4% weightage (Class 11, Zoology)
Key concepts: Blood composition, heart, cardiac cycle, ECG, blood groups, coagulation
Question pattern: ECG interpretation, cardiac output. 2 questions.
Breathing and Exchange of Gases — 2.3% weightage (Class 11, Zoology)
Key concepts: Respiratory system, gas transport, respiratory volumes, disorders
Question pattern: Oxygen dissociation curve, lung volumes. 2 questions.
Plant Growth and Development — 2.2% weightage (Class 11, Botany)
Key concepts: Phytohormones, photoperiodism, vernalisation, growth curves
Question pattern: Hormone-function matching, PGR applications. 2 questions.
How to Use This Page
Every topic above has a unique anchor link. Our NEET 2026 prediction papers deep-link directly to these sections — click any topic from a prediction paper to jump to the exact concept explanation.