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NEET Biology Syllabus 2025 – Chapter-Wise Syllabus, Important Topics

By Diksha Chaturvedi
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NEET Biology Syllabus

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The biology syllabus is important for students preparing for the NEET medical examination in 2025. NEET aspirants must thoroughly understand biology topics and high-weighting areas. It is estimated that more than 50% of questions will be asked from the NEET Biology syllabus 2025.

 The syllabus for Biology comprises 17 topics in botany and 15 topics in zoology. The ‘molecular basis of inheritance’ chapter receives a significant weightage of 14% in the NEET biology syllabus 2025. The animal kingdom chapter receives 13% weightage, while the biotechnology chapter holds 12% weight. 

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NEET Syllabus for Biology

The syllabus for the subject of Biology in the NEET 2025 examination comprises important themes from Botany and Zoology. Students are encouraged to focus on the high-weightage areas in Biology to score well. Here is a list of key topics in the NEET syllabus for biology.

NEET Syllabus for Biology
ChaptersWeightage
Molecular Basis of Inheritance14%
Animal Kingdom13%
Biotechnology – Principles and Processes12%
Principles of Inheritance and Variation10%
Biomolecules10%

What is the Syllabus of Biology in NEET

The biology syllabus is important for students beginning their NEET exam preparation. NEET aspirants may ask the question “What is the syllabus of biology in NEET?” The direct response is that the NEET biology syllabus comprises 10 units revolving around the themes of botany and zoology. Check the table below for an overview of the syllabus of Biology in NEET.

Syllabus of Biology in NEET
UnitsDetails
Unit 1Diversity in the Living World
Unit 2Structural Organisation in Animals and Plants
Unit 3Cell Structure and Function
Unit 4Plant Physiology
Unit 5Human Physiology
Unit 6Reproduction
Unit 7Genetics and Evolution
Unit 8Biology and Human Welfare
Unit 9Biotechnology and Its Applications
Unit 10Ecology and Environment

Join iQuanta NEET CourseNEET Biology Syllabus Chapter Wise

The NEET Biology subject has 32 themes around botany and zoology segments. Students preparing for the NEET 2025 examination must check out the NEET biology syllabus chapter-wise breakdown of topics from the table below.

NEET Biology Syllabus Chapter Wise
UnitsDetails
Unit 1
  • 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-nonchordate up to phyla level and chordate up to class level.
Unit 2
  • Morphology and modifications; Tissues; Anatomy and functions of different parts of flowering plants: Root, stem, leaf, inflorescence- cymose and recemose, flower, fruit and seed, Family.
  • Animal tissues; Morphology, anatomy and functions of different systems of an insect.
Unit 3
  • Cell theory and cell as the basic unit of life; Structure of prokaryotic and eukaryotic cell; Plant cell and animal cell; Cell envelope, cell membrane, cell wall; Cell organelles structure and function; Endomembrane system-endoplasmic reticulum, Golgi bodies, lysosomes, vacuoles; mitochondria, ribosomes, plastids, microbodies; Cytoskeleton, cilia, flagella, centrioles; Nucleus-nuclear membrane, chromatin, nucleolus.
  • Chemical constituents of living cells: Biomolecules-structure and function of proteins, carbohydrates, lipids, nucleic acids; Enzymes-types, properties, enzyme action, classification and nomenclature of enzymes
  • B Cell division: Cell cycle, mitosis, meiosis and their significance.
Unit 4
  • Photosynthesis: Photosynthesis as a means of Autotrophic nutrition; Site of photosynthesis take place; pigments involved in Photosynthesis; Photochemical and biosynthetic phases of photosynthesis; Cyclic and non-cyclic and photophosphorylation; Chemiosmotic hypothesis; Photorespiration C3 and C4 pathways; Factors affecting photosynthesis.
  • Respiration: Exchange gases; Cellular respiration-glycolysis, fermentation, TCA cycle and electron transport system; Energy relations- Number of ATP molecules generated; Amphibolic pathways; Respiratory quotient.
  • Plant growth and development: Seed germination; Phases of Plant growth and plant growth rate; Conditions of growth; Differentiation, dedifferentiation and redifferentiation; Sequence of developmental process in a plant cell; Growth regulators auxin, gibberellin, cytokinin, ethylene, ABA;
Unit 5
  • Breathing and Respiration: Respiratory organs in animals; Respiratory system in humans; Mechanism of breathing and its regulation in humans-Exchange of gases, transport of gases and regulation of respiration Respiratory volumes; Disorders related to respiration-Asthma, Emphysema, Occupational respiratory disorders.
  • Body fluids and circulation: Composition of blood, blood groups, coagulation of blood; Composition of lymph and its function; Human circulatory system-Structure of human heart and blood vessels; Cardiac cycle, cardiac output, ECG, Double circulation; Regulation of cardiac activity; Disorders of circulatory system-Hypertension, Coronary artery disease, Angina pectoris, Heart failure.
  • Excretory products and their elimination: Modes of excretion- Ammonotelism, ureotelism, uricotelism; Human excretory system structure and function; Urine formation, Osmoregulation; Regulation of kidney function-Renin-angiotensin, Atrial Natriuretic Factor, ADH and Diabetes insipidus; Role of other organs in excretion; Disorders; Uraemia, Renal failure, Renal calculi, Nephritis; Dialysis and artificial kidney. Locomotion and Movement: Types of movement- ciliary, flagellar, muscular; Skeletal muscle- contractile proteins and muscle contraction; Skeletal system and its functions; Joints; Disorders of muscular and skeletal system-Myasthenia gravis, Tetany, Muscular dystrophy, Arthritis, Osteoporosis, Gout.
  • Neural control and coordination: Neuron and nerves; Nervous system in humans central nervous system, peripheral nervous system and visceral nervous system; Generation and conduction of nerve impulses;
  • Chemical coordination and regulation: Endocrine glands and hormones; Human endocrine system-Hypothalamus, Pituitary, Pineal, Thyroid, Parathyroid, Adrenal, Pancreas, Gonads; Mechanism of hormone action; Role of hormones as messengers and regulators, Hypo-and hyperactivity and related disorders. 
Unit 6
  • 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; Fertilisation, embryo development up to blastocyst formation, implantation; Pregnancy and placenta formation; Parturition; Lactation.
  • Reproductive health: Need for reproductive health and prevention of sexually transmitted diseases; Birth control-Need and Methods, Contraception and Medical Termination of Pregnancy; Amniocentesis; Infertility and assisted reproductive technologies – IVF, ZIFT, GIFT.
Unit 7
  • Heredity and variation: Mendelian Inheritance; Deviations from MendelismIncomplete 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, Colour 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 and Natural Selection with examples, types of natural selection; Gene flow and genetic drift; Hardy-Weinberg’s principle; Adaptive Radiation; Human evolution.
Unit 8
  • Health and Disease; Pathogens; parasites causing human diseases; 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
  • Principles and process of Biotechnology: Genetic engineering.
  • 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
  • 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 and sanctuaries, Sacred Groves.

What are the topics in the NEET Biology Syllabus for Zoology and Botany?

The NEET Biology syllabus covers topics from zoology and botany subjects. Important themes are the molecular basis of inheritance, animal kingdom, biotechnology, etc. The concepts under Botany and Zoology in the NEET Biology syllabus for 2025 are presented below.

NEET Biology Syllabus for Zoology and Botany
Zoology TopicsBotany Topics
Animal KingdomMolecular Basis of Inheritance
Biotechnology – Principles and ProcessesPrinciples of Inheritance and Variation
BiomoleculesCell Cycle and Cell Division
Structural Organisation in Animals (Animal Tissues)Anatomy of Flowering Plants
Reproductive HealthPlant Kingdom
Biotechnology and its ApplicationsSexual Reproduction in Flowering Plants
Human ReproductionMorphology of Flowering Plants
Locomotion and MovementPlant Growth and Development
EvolutionCell: The Unit of Life
Human Health and DiseaseBiodiversity and Conservation
Body Fluids and CirculationRespiration in Plants and Photosynthesis in Higher Plants
Breathing and Exchange of GasesMicrobes in Human Welfare and Ecosystem
Chemical Coordination and IntegrationOrganisms and Populations, Biological Classification and The Living World

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FAQs

What is the NEET biology chapter list?

The NEET biology chapter list includes topics such as Diversity in the Living World, Structural Organisation in Animals and Plants, Cell Structure and Function, Plant Physiology
Human Physiology, Reproduction, Genetics and Evolution, Biology and Human Welfare, Biotechnology and Its Applications, and Ecology and Environment.

Where can I download the NEET biology syllabus PDF?

The NEET biology syllabus PDF is available for download on the NTA official website. 

 What is the NEET biology syllabus 2025?

NEET biology syllabus comprises 10 units revolving around the themes of botany and zoology. 

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