Want to score 650+ in NEET 2025? Understanding the NEET Biology chapter-wise weightage is crucial for smart preparation. This guide provides the latest Botany & Zoology weightage, helping you focus on high-scoring topics. Learn important chapters, syllabus breakdown, and expert tips to boost your NEET score and secure your medical seat efficiently.
NEET 2025 Biology Chapter-Wise Weightage: Must-Know Chapters to Secure Your Medical Seat
Many aspiring students in India aspire to pass the National Eligibility Entrance Test (NEET). To turn this ambition into a reality, proper preparation is essential.
As part of that preparation, you should clearly understand the syllabus and its weightage. Since NEET is primarily focused on medicine, biology is the core subject.
So, if you want to secure 650+ marks in NEET and get into the best medical colleges, you’ll need to better understand NEET 2025 Biology weightage.
The National Testing Agency (NTA) has recently issued the chapter-by-chapter weightage for NEET 2025, which will serve as an excellent study guide. Consider it a map to help you make the best use of your study time.
Understanding which chapters are more important allows you to focus on them and improve your chances of getting into your selected medical institution. In this blog, we’ll discuss the NEET Biology chapter-wise weightage 2025 helping you score higher in NEET.
NEET 2025 Biology Complete Chapter Wise Syllabus
| Unit | Topics | Subtopics |
| UNIT 1: Diversity in Living World | What is living? | Biodiversity; Need for classification; Taxonomy & Systematics; Concept of species and taxonomical hierarchy; Binomial nomenclature. |
| Five kingdom classification | Salient features and classification of Monera, Protista, and Fungi; Lichens; Viruses and Viroids. | |
| Classification of Plants | Algae, Bryophytes, Pteridophytes, Gymnosperms (three to five salient and distinguishing features with at least two examples of each). | |
| Classification of Animals | Non-chordate up to phyla level and chordate up to class level (three to five salient features with at least two examples). | |
| UNIT 2: Structural Organisation in Animals and Plants | Morphology and Modifications | Tissues; Anatomy and functions of different parts of flowering plants – root, stem, leaf, inflorescence (cymose and racemose), flower, fruit, and seed. |
| Family Classification | Malvaceae, Cruciferae, Leguminosae, Compositae, Graminae. | |
| Animal Tissues | Morphology, anatomy, and functions of digestive, circulatory, respiratory, nervous, and reproductive systems of an insect (Frog) (Brief account only). | |
| UNIT 3: Cell Structure and Function | Cell Theory | Cell as the basic unit of life; Structure of prokaryotic and eukaryotic cells; Plant cell and animal cell. |
| Cell Components | Cell envelope, cell membrane, cell wall, organelles (structure and function), endomembrane system (ER, Golgi bodies, lysosomes, vacuoles), mitochondria, ribosomes, plastids, microbodies. | |
| Cytoskeleton & Movement | Cilia, flagella, centrioles (ultra-structure and function). | |
| Nucleus | Nuclear membrane, chromatin, nucleolus. | |
| Biomolecules | Structure and function of proteins, carbohydrates, lipids, nucleic acids. | |
| Enzymes | Types, properties, enzyme action, classification, and nomenclature. | |
| Cell Division | Cell cycle, mitosis, meiosis, and their significance. | |
| UNIT 4: Plant Physiology | Photosynthesis | Autotrophic nutrition; Site of photosynthesis; Pigments; Photochemical & biosynthetic phases; Cyclic and non-cyclic photophosphorylation; Chemiosmotic hypothesis; Photorespiration; C3 and C4 pathways; Factors affecting photosynthesis. |
| Respiration | Exchange of gases; Cellular respiration (glycolysis, fermentation, TCA cycle, electron transport system); Energy relations (ATP generation); Amphibolic pathways; Respiratory quotient. | |
| Plant Growth & Development | Seed germination; Phases of growth; Conditions of growth; Differentiation, dedifferentiation, and redifferentiation; Growth regulators (auxin, gibberellin, cytokinin, ethylene, ABA). | |
| UNIT 5: Human Physiology | Breathing & Respiration | Respiratory system in humans; Mechanism of breathing; Exchange & transport of gases; Regulation of respiration; Respiratory disorders (Asthma, Emphysema, Occupational respiratory disorders). |
| Circulation | Blood composition; Blood groups; Coagulation; Lymph composition and function; Human circulatory system (heart, blood vessels); Cardiac cycle, output, ECG, Double circulation; Cardiac regulation; Circulatory disorders (Hypertension, Coronary artery disease, Angina, Heart failure). | |
| Excretion | Modes of excretion (Ammonotelism, Ureotelism, Uricotelism); Human excretory system (structure and function); Urine formation, Osmoregulation; Kidney regulation (Renin-Angiotensin, ANF, ADH, Diabetes insipidus); Excretory disorders (Uraemia, Renal failure, Renal calculi, Nephritis, Dialysis). | |
| Locomotion & Movement | Types of movement (ciliary, flagellar, muscular); Skeletal muscle (contractile proteins, contraction); Skeletal system and joints; Disorders (Myasthenia gravis, Tetany, Muscular dystrophy, Arthritis, Osteoporosis, Gout). | |
| Neural Control & Coordination | Neurons and nerves; Human nervous system (central, peripheral, visceral); Nerve impulse generation & conduction. | |
| Chemical Coordination | Endocrine glands & hormones; Human endocrine system (Hypothalamus, Pituitary, Pineal, Thyroid, Parathyroid, Adrenal, Pancreas, Gonads); Hormone action; Disorders (Dwarfism, Acromegaly, Cretinism, Goiter, Diabetes, Addison’s disease). | |
| UNIT 6: Reproduction | Sexual Reproduction in Plants | Flower structure; Male & female gametophyte development; Pollination (types, agents); Outbreeding devices; Pollen-Pistil interaction; Double fertilization; Post-fertilization events (endosperm & embryo development, seed & fruit formation); Special modes (apomixis, parthenocarpy, polyembryony). |
| Human Reproduction | Male & female reproductive systems; Microscopic anatomy (testis & ovary); Gametogenesis (spermatogenesis, oogenesis); Menstrual cycle; Fertilization, embryo development, implantation; Pregnancy, placenta formation, parturition, lactation. | |
| Reproductive Health | Need for reproductive health; STD prevention; Birth control methods; Contraception; Medical Termination of Pregnancy (MTP); Amniocentesis; Infertility & Assisted Reproductive Technologies (IVF, ZIFT, GIFT). | |
| UNIT 7: Genetics and Evolution | Heredity & Variation | Mendelian inheritance; Deviations (Incomplete dominance, Co-dominance, Multiple alleles, Blood groups, Pleiotropy, Polygenic inheritance); Chromosome theory of inheritance; Sex determination (Humans, Birds, Honeybee); Linkage, crossing over, sex-linked inheritance (Haemophilia, Colour blindness); Mendelian disorders (Thalassemia, Down’s syndrome, Turner’s syndrome, Klinefelter’s syndrome). |
| Molecular Basis of Inheritance | DNA & RNA structure; DNA replication, packaging; Central dogma; Transcription, genetic code, translation; Gene regulation (Lac Operon); Human genome project; DNA fingerprinting. | |
| Evolution | Origin of life; Evidence for evolution; Darwin’s theory; Modern Synthetic Theory; Mechanisms (Mutation, Recombination, Natural Selection, Genetic Drift, Hardy-Weinberg Principle); Adaptive Radiation; Human evolution. | |
| UNIT 8: Biology and Human Welfare | Health & Disease | Pathogens & human diseases (Malaria, Filariasis, Ascariasis, Typhoid, Pneumonia, Common cold, Amoebiasis, Ringworm, Dengue, Chikungunya); Immunology concepts; Vaccines; Cancer, HIV/AIDS; Drug & alcohol abuse. |
| Microbes in Human Welfare | Role in food processing, industrial production, sewage treatment, energy generation, biocontrol agents, bio fertilizers. | |
| UNIT 9: Biotechnology and Its Applications | Principles & Process | Genetic engineering (Recombinant DNA technology). |
| Applications | Biotechnology in health & agriculture (Human insulin, vaccines, gene therapy, GMOs, Bt crops, transgenic animals); Biosafety (Biopiracy, Patents). | |
| UNIT 10: Ecology and Environment | Organisms & Environment | Population interactions (Mutualism, Competition, Predation, Parasitism); Population attributes (Growth, Birth rate, Death rate, Age distribution). |
| Ecosystem | Patterns, components; Productivity, decomposition, energy flow; Pyramids (Number, Biomass, Energy). | |
| Biodiversity & Conservation | Biodiversity concepts, patterns, importance, loss, conservation; Hotspots, endangered species, extinction, Red Data Book, biosphere reserves, national parks, sanctuaries, sacred groves. |
NEET 2025 Biology Weigtage
If you want to score 650+ and get into the best medical college then understanding the NEET chapter-wise weightage of the Biology syllabus is crucial. A well-planned study strategy ensures that you focus on high-scoring topics while covering the entire syllabus comprehensively.
| NEET Chapter Wise Weightage 2025 for Botany | |
| Chapters/Topics | Weightage (%) |
| Biodiversity and Conservation | 4% |
| Anatomy of Flowering Plants | 7% |
| Cell: The Unit of Life | 5% |
| Respiration in Plants | 4% |
| Microbes in Human Welfare | 4% |
| Cell Cycle and Cell Division | 9% |
| Molecular Basis of Inheritance | 14% |
| Principles of Inheritance and Variation | 10% |
| Sexual Reproduction in Flowering Plants | 6% |
| Ecosystem | 4% |
| Morphology of Flowering Plants | 6% |
| Plant Growth and Development | 6% |
| The Living World | 1% |
| Plant Kingdom | 7% |
| Biological Classification | 3% |
| Organisms and Populations | 4% |
| Photosynthesis in Higher Plants | 4% |
| NEET Chapter Wise Weightage 2025 for Zoology | |
| Chapters/Topics | Weightage (%) |
| Structural Organisation in Animals (Animal Tissues) | 8% |
| Locomotion and Movement | 6% |
| Body Fluids and Circulation | 5% |
| Evolution | 6% |
| Biomolecules | 10% |
| Human Reproduction | 6% |
| Breathing and Exchange of Gases | 4% |
| Excretory Products and their Elimination | 5% |
| Reproductive Health | 8% |
| Biotechnology – Principles and Processes | 12% |
| Human Health and Disease | 6% |
| Biotechnology and its Applications | 7% |
| Animal Kingdom | 13% |
| Neural Control and Coordination | 2% |
| Chemical Coordination and Integration | 4% |
Conclusion
In summary, the NEET 2025 syllabus has evolved and biology is an important subject, as it encompasses topics such as genetics, ecology, and human physiology. Not only that it also encompasses high marks. With a detailed NEET 2025 Biology Weightage layout you’ll be able to study smartly and effectively.
However, despite a clear understanding of the NEET Biology weightage clearing the NEET 2025 examination is not easy. That’s why it’s a good idea to get help from the top NEET coaching in Sikar as part of your NEET 2025 preparation strategy. So, utilize the NEET 2025 Biology Weightage markup and you’ll thrive in NEET 2025.
FAQ
What is the weightage of Biology in NEET 2025?
It weighs about 50% of the total marks in NEET 2025 making it the most important subject
How is the NEET Biology syllabus divided?
The syllabus is divided into Botany and Zoology. It is also divided into 10 units, which cover all the important topics.
Are NCERTs enough for NEET preparation?
Yes, NCERT books are a good starting point for NEET preparation. However, it’s a good idea to explore other standard books in your preparation journey.
Why should I know the chapter wise weightage of biology for NEET 2025?
It’s important because it helps you allocate your time better, improve your efficiency, focus on high-scoring topics, and practice more questions from frequently tested chapters.