NEET UG 2025 Biology Syllabus

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Chapter Name

Topics

Diversity in Living World

(Diversity in Living Organisms)

• What is living?; Biodiversity; Need for classification;: Taxonomy & Systematics; Concept of species and taxonomic hierarchy; Binomial nomenclature
• Five kingdom classification; 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 (three to five salient and distinguishing features and at least two examples of each category)
• Salient features and classification of animals-nonchordate up to phyla level and chordate up to class level (three to five salient features and at least two examples)

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 (To be dealt along with the relevant practical of the Practical Syllabus) Family (malvaceae, Cruciferae, leguminoceae, compositae, graminae).
• Animal tissues; Morphology, anatomy and functions of different systems (digestive, circulatory, respiratory, nervous and reproductive) of an insect (Frog). (Brief account only)

Cell Structure and Function

• 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, micro bodies; Cytoskeleton, cilia, flagella, centrioles (ultra structure and function); 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.

Plant Physiology

• Photosynthesis: Photosynthesis as a means of Autotrophic nutrition; Site of photosynthesis take place; pigments involved in Photosynthesis (Elementary idea); 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 (anaerobic), TCA cycle and electron transport system (aerobic); 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;

Human Physiology

• Breathing and Respiration: Respiratory organs in animals (recall only); 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 (To be dealt with the relevant practical of Practical syllabus); 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 impulse;
• Chemical coordination and regulation: Endocrine glands and hormones; Human endocrine system-Hypothalamus, Pituitary, Pineal, Thyroid, Parathyroid. Adrenal, Pancreas, Gonads; Mechanism of hormone action (Elementary Idea), Role of hormones. as messengers and regulators, Hypo-and hyperactivity and related disorders (Common disorders e.g. Dwarfism, Acromegaly, Cretinism, goitre, exophthalmic goitre, diabetes. Addison's disease).

(Imp: Diseases and disorders mentioned above to be dealt in brief)

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Topics

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; Fertilisation, embryo development upto 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).

Genetics and 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, 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 evidences 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.

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.

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, Genes therapy; Genetically modified :organisms-Bt crops: Transgenic Animals Biosafety issues-Biopiracy; and patents

Ecology and Environment

• Organisms and environment
• Population interactions-mutualism, competition..predation,
• Parasitism Population attributes-growth. birth rate and death rate, age distribution.
• Ecosystem: Pattems, components; productivity and decomposition
• Energy flow: Pyramids of numbers, 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