NEET Biology Syllabus for 2023

    Aspirants aiming to crack the medical entrance test with ease should know the NEET 2023 Biology syllabus thoroughly. The Biology syllabus of NEET consists of 10 units. The NEET BIOLOGY SYLLABUS is the NCERT prescribed one. 2 sections from 10 units, divided as botany and zoology are there. Each section contains 45 questions which result in 360 marks in total. As per the previous year's toppers and subject matter experts, the Biology syllabus of NEET 2023 is easy, if compared to the other two compulsory subjects i,e. Physics & Chemistry. Candidates with a better concept clarity of the NEET Biology syllabus can score well in the entrance exam. NEET Biology syllabus 2023 carries an almost equal weightage of questions from Class 11 and 12. So, aspirants are required to go through the syllabus in detail.

    NEET Syllabus 2023 for Biology

    Class XI

    Class XII

    Diversity in the Living World


    Structural Organisation in Plants and Animals

    Genetics and Evolution

    Cell: Structure and Functions

    Biology in Human Welfare

    Plant Physiology

    Biotechnology and its Applications

    Human Physiology

    Ecology and Environmental Issues




    UNIT I:

    Diversity in Living World

    What is living? Biodiversity; Need for classification; Three domains of life; Taxonomy & Systematics; Concept of species and taxonomical hierarchy; Binomial nomenclature; Tools for study of Taxonomy - Museums, Zoos, Herbaria, Botanical gardens.

    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 and Angiosperms (three to five salient and distinguishing features and at least two examples of each category); Angiosperms classification up to class, characteristic features and examples).

    Salient features and classification of animals - no chordate up to phyla level and chordate up to classes level (three to five salient features and at least two examples).

    UNIT II:

    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 recemose, flower, fruit and seed (To be dealt along with the relevant practical of the Practical Syllabus).

    Animal tissues; Morphology, anatomy and functions of different systems (digestive, circulatory, respiratory, nervous and reproductive) of an insect (cockroach).
    (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, microbodies; Cytoskeleton, cilia, flagella, centrioles (ultrastructure 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.

    B Cell division: Cell cycle, mitosis, meiosis and their significance

    UNIT IV:

    Plant Physiology

    Transport in plants: Movement of water, gases and nutrients; Cell to cell transport-Diffusion, facilitated diffusion, active transport; Plant - water relations - Imbibition, water potential, osmosis, plasmolysis; Long distance transport of water - Absorption, apoplast, symplast, transpiration pull, root pressure and guttation; Transpiration - Opening and closing of stomata; Uptake and translocation of mineral nutrients - Transport of food, phloem transport, Mass flow hypothesis; Diffusion of gases (brief mention).

    Mineral nutrition: Essential minerals, macro and micronutrients and their role; Deficiency symptoms; Mineral toxicity; Elementary idea of Hydroponics as a method to study mineral nutrition; Nitrogen metabolism - Nitrogen cycle, biological nitrogen fixation.

    Photosynthesis: Photosynthesis as a means of Autotrophic nutrition; Site of photosynthesis take place; pigments involved in Photosynthesis (Elementary idea); Photochemical and biosynthetic phases of 54 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; Seed dormancy; Vernalisation; Photoperiodism.

    UNIT V:

    Human Physiology

    Digestion and absorption; Alimentary canal and digestive glands; Role of digestive enzymes and gastrointestinal hormones; Peristalsis, digestion, absorption and assimilation of proteins, carbohydrates and fats; Caloric value of proteins, carbohydrates and fats; Egestion; Nutritional and digestive disorders - PEM, indigestion, constipation, vomiting, jaundice, diarrhoea.

    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, fiagellar, 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; Reflex action; Sense organs; Elementary structure and function of eye and ear.

    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).




    UNIT I:


    Reproduction in organisms: Reproduction, a characteristic feature of all organisms for continuation of species; Modes of reproduction - Asexual and sexual; Asexual reproduction; Modes - Binary fission, sporulation, budding, gemmule, fragmentation; vegetative propagation in plants.

    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 - apomixes, 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 (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 II:

    Genetics and Evolution

    Heredity and variation: Mendelian Inheritance; Deviations from Mendelism - Incomplete dominance, Co-dominance, 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 finger printing.

    Evolution: Origin of life; Biological evolution and evidences for biological evolution from Palaeontology, 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, ring worm); Basic concepts of immunology - vaccines; Cancer, HIV and AIDS; Adolescence, drug and alcohol abuse.

    Improvement in food production; Plant breeding, tissue culture, single cell protein, Biofortification; Apiculture and Animal husbandry.

    Microbes in human welfare: In household food processing, industrial production, sewage treatment, energy generation and as biocontrol agents and biofertilizers.

    UNIT IV:

    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 V:

    Ecology and environment

    Organisms and environment: Habitat and niche; Population and ecological adaptations; 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; Nutrient cycling (carbon and phosphorous); Ecological succession; Ecological Services Carbon fixation, pollination, oxygen release.

    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.

    Environmental issues: Air pollution and its control; Water pollution and its control; Agrochemicals and their effects; Solid waste management; radioactive waste management; Greenhouse effect and global warning; Ozone depletion; Deforestation; Any three case studies as success stories addressing environmental issues.