Knowing the NEET Biology syllabus 2025 along with respective chapter-wise weightage will come in handy for the students as they prepare the study strategy accordingly. Of course, the biology section in NEET consists of a total of 90 questions on Botany and Zoology, which are pretty crucial for the future medical students. The NTA had revised the NEET Biology syllabus recently and presented some new topics considering the present NCERT curriculum. Given below is a comprehensive guide to the NEET 2025 Biology syllabus for Class 11 and Class 12, as well as some crucial topics and weightage.
Importance of NEET Biology Syllabus 2025
Biology occupies the maximum portion of NEET, as it constitutes half of the examination. Proper learning and frequent revision from the day one will help one achieve good scores in the NEET exam. Mastery of biology demands persistent study, systematic learning, and a proper approach for covering syllabus. Here’s an overview of what the NEET 2025 Biology syllabus includes and how to approach each section for optimal performance.
NEET Biology Syllabus 2025 Overview
Biology plays a huge role in students’ total NEET score and therefore, it is very important for complete understanding of the syllabus for preparation. So, let us break down the NEET Biology syllabus so that you know what essential topics and the overall structure of the syllabus is. Keeping regular study and understanding the syllabus of NEET 2025, with emphasis on high-weightage topics, will be the way you can lead your success in NEET 2025. Proper preparation focusing on basic concepts will give a strong basis for success in the NEET 2025 exam.
NEET Biology Class 11 Syllabus 2025
The syllabus of Class 11 will give the basic fundamentals required to do well in NEET. Here is a broad view of the Class 11 Biology syllabus for NEET 2025: Diversity in Living Organisms Structural Organization in Plants and Animals Cell Structure and Function Plant Physiology Human Physiology Each of these subjects provides the foundation to higher class 12 subjects, and it is of the utmost importance that students must understand them well.
| Unit Name | Chapters / Topics |
| Unit 1 – Diversity of Living Organisms |
– What is living?
– Biodiversity; Need for classification; Taxonomy & Systematics; Concept of species and taxonomic hierarchy; Binomial nomenclature – Five kingdom classifications: salient features and classification of Monera, Protista, and Fungi into major groups; Lichens; Viruses and Viroids – Salient features and classification of plants into major groups (Algae, Bryophytes, Pteridophytes, Gymnosperms) – Salient features and classification of animals (non-chordate up to phyla level, chordate up to classes level) |
| Unit 2 – Structural Organization in Plants & Animals |
– Morphology and modifications; Tissues; Anatomy and functions of different parts of flowering plants: Root, stem, leaf, inflorescence (cymose and racemose), flower, fruit, and seed (linked with practical syllabus)
– Family (Malvaceae, Cruciferae, Leguminosae, Compositae, Gramineae) – Animal tissues; Morphology, anatomy, and functions of different systems (digestive, circulatory, respiratory, nervous, and reproductive) of an insect (Frog) (Brief account only) |
| Unit 3 – Cell Structure and Function |
– Cell theory and cell as the basic unit of life; Structure of prokaryotic and eukaryotic cells; Plant cell and animal cell; Cell envelope, cell membrane, cell wall
– Cell organelle structure and function; Endomembrane system (endoplasmic reticulum, Golgi bodies, lysosomes, vacuoles); mitochondria, ribosomes, plastids, microbodies; Cytoskeleton, cilia, flagella, centrioles – Nucleus (nuclear membrane, chromatin, nucleolus) – Biomolecules (structure and function of proteins, carbohydrates, lipids, nucleic acids) – Enzymes (types, properties, enzyme action, classification, and nomenclature of enzymes) – Cell division: Cell cycle, mitosis, meiosis, and their significance |
| Unit 4 – Plant Physiology |
– Photosynthesis: Autotrophic nutrition; Site and pigments involved; Photochemical and biosynthetic phases; Cyclic and non-cyclic photophosphorylation; Chemiosmotic hypothesis; Photorespiration; C3 and C4 pathways; Factors affecting photosynthesis
– Respiration: Gas exchange; Cellular respiration (glycolysis, fermentation, TCA cycle, electron transport system); ATP generation; Amphibolic pathways; Respiratory quotient – Plant growth and development: Seed germination; Phases of plant growth and growth rate; Differentiation, dedifferentiation, and redifferentiation; Developmental sequence in a plant cell; Growth regulators (auxin, gibberellin, cytokinin, ethylene, ABA) |
| Unit 5 – Human Physiology |
– Breathing and Respiration: Respiratory organs in animals; Human respiratory system; Mechanism of breathing; Gas exchange, transport, and regulation; Respiratory volumes; Respiratory disorders (Asthma, Emphysema, Occupational respiratory disorders)
– Body fluids and circulation: Blood composition, blood groups, coagulation; Lymph composition and function; Human circulatory system (heart structure, blood vessels, cardiac cycle, cardiac output, ECG); Double circulation; Cardiac regulation; Circulatory disorders (Hypertension, coronary artery disease, Angina pectoris, Heart failure) – Excretory products and elimination: Modes of excretion (Ammonotelism, ureotelism, uricotelism); Human excretory system (structure, function, urine formation, osmoregulation); Regulation (Renin-angiotensin, Atrial Natriuretic Factor, ADH, Diabetes insipidus); Other organs in excretion; Disorders (Uraemia, Renal failure, Renal calculi, Nephritis, Dialysis, artificial kidney) – Locomotion and Movement: Types of movement (ciliary, flagellar, muscular); Skeletal muscle (contractile proteins, muscle contraction); Skeletal system (structure, joints); Disorders (Myasthenia gravis, Tetany, Muscular dystrophy, Arthritis, Osteoporosis, Gout) – Neural control and coordination: Neuron, nerves; Human nervous system (central, peripheral, visceral); Nerve impulse generation and conduction – Chemical coordination and regulation: Endocrine glands, hormones; Human endocrine system (Hypothalamus, pituitary, pineal, thyroid, parathyroid, adrenal, pancreas, gonads); Hormone action; Hormonal regulation and disorders (Dwarfism, Acromegaly, Cretinism, goiter, exophthalmic goiter, diabetes, Addison’s disease) |
NEET Biology Class 12 Syllabus 2025
Class 12 syllabus develops ideas from Class 11 and introduces genetics, biotechnology, etc. Genetics and evolution, biology, and human welfare, and biotechnology and its application, which include ecology and environment. These are some of the most important topics through which one can prepare for NEET as these are the most frequently appearing topics in NEET with a lot of weightage.
| Unit Name | Unit Topics |
| Unit 6 – Reproduction |
Sexual reproduction in flowering plants: Flower structure; Development of male and female gametophytes; Pollination-types, agencies, and examples; Outbreeding devices; Pollen-Pistil interaction; Double fertilization; Post fertilization events – Development of endosperm and embryo, Development of seed and formation of fruit; Special modes – apomixis, parthenocarpy, polyembryony; Significance of seed and fruit formation.
Human Reproduction: Male and female reproductive systems; Microscopic anatomy of testis and ovary; Gametogenesis – spermatogenesis & oogenesis; Menstrual cycle; Fertilization, embryo development up to blastocyst formation, implantation; Pregnancy and placenta formation (Elementary idea); Parturition (Elementary idea); Lactation (Elementary idea). Reproductive health: Need for reproductive health and prevention of sexually transmitted diseases (STD); Birth control – Need and Methods, Contraception and Medical Termination of Pregnancy (MTP); Amniocentesis; Infertility and assisted reproductive technologies – IVF, ZIFT, GIFT (Elementary idea for general awareness). |
| Unit 7 – Genetics & Evolution |
Heredity and variation: Mendelian inheritance; Deviations from Mendelism – Incomplete dominance, Codominance, Multiple alleles, and Inheritance of blood groups, Pleiotropy; Elementary idea of polygenic inheritance; Chromosome theory of inheritance; Chromosomes and genes; Sex determination – in humans, birds, honey bee; Linkage and crossing over; Sex-linked inheritance – Haemophilia, color blindness; Mendelian disorders in humans – Thalassemia; chromosomal disorders in humans – Down’s syndrome, Turner’s and Klinefelter’s syndromes.
Molecular basis of Inheritance: Search for genetic material and DNA as genetic material; Structure of DNA and RNA; DNA packaging; DNA replication; Central dogma; Transcription, genetic code, translation; Gene expression and regulation – Lac Operon; Genome and human genome project; DNA fingerprinting, protein biosynthesis. Evolution: Origin of life; Biological evolution and evidence for biological evolution from Paleontology, comparative anatomy, embryology, and molecular evidence; Darwin’s contribution, modern synthetic theory of Evolution; Mechanism of evolution – Variation (Mutation and Recombination) and Natural Selection with examples, types of natural selection; gene flow and genetic drift; Hardy-Weinberg’s principle; Adaptive Radiation; Human evolution. |
| Unit 8 – Biology and Human Welfare |
Health and Disease: Pathogens; parasites causing human diseases (Malaria, Filariasis, Ascariasis, Typhoid, Pneumonia, common cold, amoebiasis, ringworm, dengue, chikungunya); Basic concepts of immunology – vaccines; Cancer, HIV, and AIDS; Adolescence, drug, and alcohol abuse; Tobacco abuse.
Microbes in human welfare: In household food processing, industrial production, sewage treatment, energy generation, and as biocontrol agents and biofertilizers. |
| Unit 9 – Biotechnology and its Applications |
Principles and process of Biotechnology: Genetic engineering (recombinant DNA technology).
Application of Biotechnology in Health and Agriculture: Human insulin and vaccine production, gene therapy, Genetically modified organisms – Bt crops; Transgenic Animals; Biosafety issues – Biopiracy and patents. |
| Unit 10 – Ecology and Environment |
Organisms and environment: Population interactions – mutualism, competition, predation, parasitism; Population attributes – growth, birth rate and death rate, age distribution.
Ecosystem: Patterns, components; productivity and decomposition; Energy flow; Pyramids of number, biomass, energy. Biodiversity and its conservation: Concept of Biodiversity; patterns of Biodiversity; Importance of Biodiversity; Loss of Biodiversity; Biodiversity conservation – Hotspots, endangered organisms, extinction; Red Data Book; biosphere reserves, National parks, sanctuaries, and Sacred Groves. |
NEET Zoology Syllabus 2025 with Chapter-Wise Weightage
The major topics under the Zoology syllabus in NEET 2025 are five in number. It tests various concepts of zoology. Here are the important topics in Zoology.
| Chapters/Topics | Weightage (%) |
Average No. of Questions Asked (Based on 5 Years Analysis)
|
| Structural Organisation in Animals (Animal Tissues) | 8% | 4 |
| Locomotion and Movement | 6% | 3 |
| Body Fluids and Circulation | 5% | 2 |
| Evolution | 6% | 3 |
| Biomolecules | 10% | 5 |
| Human Reproduction | 6% | 3 |
| Breathing and Exchange of Gases | 4% | 2 |
| Excretory Products and their Elimination | 5% | 2 |
| Reproductive Health | 8% | 4 |
| Biotechnology – Principles and Processes | 12% | 6 |
| Human Health and Disease | 6% | 3 |
| Biotechnology and its Applications | 7% | 4 |
| Animal Kingdom | 13% | 7 |
| Neural Control and Coordination | 2% | 1 |
| Chemical Coordination and Integration | 4% | 2 |
NEET Botany Syllabus 2025 with Chapter-Wise Weightage
The NEET Botany syllabus consists of numerous topics related to plants segregated under important sections including biochemistry, cell biology, genetics, and ecology. Here is an outline of the Botany syllabus with chapter-wise weightage:
| Chapters/Topics | Weightage (%) |
Average No. of Questions asked (Based on 5 Years Analysis)
|
| Biodiversity and Conservation | 4% | 2 |
| Anatomy of Flowering Plants | 7% | 3 |
| Cell: The Unit of Life | 5% | 2 |
| Respiration in Plants | 4% | 2 |
| Microbes in Human Welfare | 4% | 2 |
| Cell Cycle and Cell Division | 9% | 4 |
| Molecular Basis of Inheritance | 14% | 6 |
| Principles of Inheritance and Variation | 10% | 5 |
| Sexual Reproduction in Flowering Plants | 6% | 3 |
| Ecosystem | 4% | 2 |
| Morphology of Flowering Plants | 6% | 3 |
| Plant Growth and Development | 6% | 3 |
| The Living World | 1% | 0 |
| Plant Kingdom | 7% | 3 |
| Biological Classification | 3% | 1 |
| Organisms and Populations | 4% | 2 |
| Photosynthesis in Higher Plants | 4% | 2 |
Top Weightage Biology Topics for NEET 2025
High-weightage topics from Botany and Zoology are to be targeted to take NEET scores to the next level. Some of the most important and highly prominent topics for NEET in Biology include:
| Botany | Topics | Zoology | Topics |
| Cell – The Unit of Life | Cell Theory, Overview of Cell, Prokaryotic Cells, Eukaryotic Cells | Structural Organization in Animals (including Frog) |
Tissues, Epithelium Tissue, Cell Junctions, Connective Tissue, Muscular Tissue, Nervous Tissue, Cockroach, Frog
|
| Cell Cycle and Cell Division | Cell Cycle, Phases of Cell Cycle, Significance of Mitosis, Meiosis I, Meiosis II, Significance of Meiosis | Biomolecules |
Chemical Composition, Metabolites, Micromolecules, Macromolecules, Carbohydrates, Amino acids, Proteins, Lipids, Nucleic acids, RNA, DNA, Enzymes
|
| The Living World | What is ‘Living’? Diversity in the Living World, Binomial Nomenclature, Taxonomic Categories | Breathing and Exchange of Gases |
Introduction to Breathing and Respiration, Respiratory Organs, Human Respiratory System, Mechanism of Breathing, Respiratory Volumes and Capacities, Exchange of Gases, Transportation of Gases, Regulation of Respiration
|
| Biological Classification | Types of Classification, Kingdom Monera, Kingdom Protista, Kingdom Fungi, Kingdom Plantae, Kingdom Animalia, Acellular Organisms, Symbiotic Organisms | Body Fluids and Circulation |
Introduction to Body Fluids, Blood, Plasma, Formed Elements, Blood Groups, Coagulation of Blood, Lymph, Circulatory Pathways, Double Circulation, Coronary Circulation, Human Circulatory System, Heart Sounds, Blood Vessels, ECG
|
| Plant Kingdom | Classification System, Taxonomy, Algae, Bryophytes, Pteridophytes, Gymnosperms | Excretory Products & Their Elimination |
Excretion, Excretory Products, Excretory Structures, Human Excretory System, Nephron, Mechanism of Urine Formation, Regulation of Kidney Function
|
| Morphology of Flowering Plants | The Root, The Stem, The Leaf, The Flower, The Fruit, The Seed, Semi-Technical Description, Families | Locomotion & Movement |
Types of Movement, Muscles, Mechanism of Muscle Contraction, Skeletal System, Joints, Muscular System Disorders
|
| Photosynthesis in Higher Plants | Early Experiments, Photosynthesis Location, Pigments, Light Reaction, Dark Reaction, C4 Pathway, Photophosphorylation | Neural Control & Coordination |
Control and Coordination, Neural System, Human Neural System, Neuron, Transmission of Impulses, Synapse, Neurotransmitters, CNS, Brain, Spinal Cord
|
| Respiration in Plants | Glycolysis, Fermentation, Aerobic Respiration, Respiratory Balance, Amphibolic Pathway, Respiratory Quotient | Chemical Coordination & Integration |
Endocrine System, Glands, Hormones, Pituitary Gland, Thyroid, Adrenal, Pancreas, Gonads, Feedback Mechanisms, Hormonal Actions
|
| Plant Growth and Development | Growth, Growth Rates, Differentiation, Dedifferentiation, Redifferentiation, Plant Growth Regulators | Animal Kingdom |
Taxonomy, Classification, Phylum- Porifera to Phylum- Chordata, Vertebrata, Classes – Cyclostomata, Pisces, Amphibia, Reptiles, Aves, Mammalia
|
| Sexual Reproduction in Flowering Plants | Angiosperm Flower, Pre-fertilization Events, Pollination, Post-fertilization Events, Apomixis, Polyembryony | Human Reproduction |
Male & Female Reproductive Systems, Spermatogenesis, Oogenesis, Menstrual Cycle, Fertilization, Embryonic Development, Parturition, Lactation
|
| Principles of Inheritance and Variation | Mendelian Genetics, Inheritance of One and Two Genes, Sex Determination, Mutation, Genetic Disorders | Reproductive Health |
Population, Contraceptive Methods, Medical Termination of Pregnancy, STDs, Infertility, ARTs
|
| Molecular Basis of Inheritance | DNA, RNA World, DNA Replication, Transcription, Genetic Code, Translation, Human Genome Project, DNA Fingerprinting | Evolution |
Origin of Life, Evolution Theories, Adaptive Radiation, Natural Selection, Hardy-Weinberg Principle, Speciation, Evolution of Man
|
| Microbes in Human Welfare | Microbes in Sewage Treatment, Biogas Production, Biocontrol Agents, Biofertilizers | Human Health and Diseases |
Immunity, Lymphoid Organs, Immunization, AIDS, Cancer, Drug and Alcohol Abuse, Adolescence
|
| Organisms and Population | Organism and Environment, Populations, Growth, Population Interactions | Biotechnology: Principles & Processes |
Genetic Engineering, Tools of rDNA Technology, GMOs, Applications in Agriculture and Medicine, Ethical Issues
|
| Ecosystem | Ecosystem Structure, Energy Flow, Ecological Pyramids | Biodiversity and Conservation | Biodiversity, Conservation Patterns, Loss of Biodiversity, Conservation Strategies |
NTA NEET 2025 Biology Tips
Comprehend Syllabus Properly: Familiarize each topic, know its relevance in NEET.
- High Weightage Chapters: Spend more time on those chapters with higher weightage for gaining maximum score potential.
- Regular Practice: Start solving previous year’s NEET questions for understanding the pattern and level of difficulty.
- Regularly make a revision schedule of the topics so that retention becomes automatic.
- Mock Tests: Tests also simulate the real environment for solving and improve time management.
NEET Biology Syllabus 2025 FAQs
1. What is the NEET Biology syllabus for 2025?
Answer: The NEET Biology syllabus for 2025 is divided into two main sections: Botany and Zoology. It includes key topics like Cell Biology, Genetics, Human Physiology, Plant Physiology, Ecology, Evolution, and Biotechnology, along with several chapters focused on Human Health, Diseases, and Animal Kingdom.
2. Which chapters in NEET Biology are most important for the 2025 exam?
Answer: Some of the most important chapters for NEET Biology 2025 include Genetics and Evolution, Cell Biology, Human Physiology, Plant Physiology, and Biotechnology. These topics carry significant weightage and frequently appear in the exam.
3. How do I prepare for the NEET Biology syllabus in 2025?
Answer: To prepare for NEET Biology 2025, start by thoroughly studying the syllabus, focusing on understanding concepts rather than rote learning. Practice regularly with sample papers, revise NCERT books, and refer to previous year’s question papers. Prioritize important chapters based on their weightage in the exam.
4. Is NEET Biology syllabus for 2025 the same as previous years?
Answer: Yes, the NEET Biology syllabus for 2025 largely follows the structure of previous years. It includes essential topics from Botany and Zoology, but it is always advisable to check for any updates from the official NEET notification to stay informed about any changes or additions.
5. How is the NEET Biology syllabus divided between Botany and Zoology?
Answer: The NEET Biology syllabus is divided into Botany and Zoology, with each section containing significant chapters. Botany covers topics like Plant Physiology, Ecology, and Plant Reproduction, while Zoology focuses on Animal Kingdom, Human Physiology, and Genetics. The topics are balanced to ensure a comprehensive understanding of both branches of Biology.
