NEET 2020 Biology Syllabus

    Atul Yadav Atul Yadav
    Exam prep master

    NEET Biology syllabus is solely based on the topics prescribed by NCERT. The topics covered in the exam comprises both class 11th and 12th curriculum. The syllabus has equal weightage in zoology and Botany. Biology individually has 50% weightage in NEET and this makes it vital to score a better rank in the exam. Consistent and thorough preparation is required to complete biology syllabus. 

    • Biology syllabus has not been changed in the past few years and is based on the syllabus of class 11th and 12th of CBSE.

    • The subject is divided into two categories of Zoology and Botany having equal weightage. Check NEET Exam Pattern

    • The difficulty level of the exam has been increasing every year and preparing all the topics is necessary.

    • Biology has a lot of definitions and scientific terms that need to be prepared and regular revision is required for better performance in the exam.

     Hence candidates must be well aware with the complete biology syllabus and prepare thoroughly covering all the topics.

    Must Read:

    NEET Biology Highlights

    Total weightage50% of NEET
    SubcategoryBotany and Zoology
    Number of questions asked90 
    Marks allotted for each question4 marks for correct answer
    Negative marking1 marks will be reduced for wrong answer
    Total marks for Biology 360 out of 720 marks

    NEET Biology class 11th syllabus

    NEET Biology class 11th syllabus

    NEET Biology syllabus of Class 11thweightage
    Unit I - Diversity in Living World9%
    Unit II- Structural Organisation in Animals and Plants9%
    Unit III- Cell Structure and Function15%
    Unit IV- Plant Physiology17%
    Unit V- Human physiology28%

    NEET biology class 11th Syllabus in detail

    Unit Syllabus
    Unit 1 – 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-non chordate up to phyla level and chordate up to classes level ( salient features and 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

     • Animal tissues; Morphology, anatomy and functions of different systems (digestive, circulatory, respiratory, nervous and reproductive) of an insect (cockroach). (Brief account only)

    Unit 3 – 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 4 – 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

    • 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 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 5 – 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 the 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 the 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, flagella, 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)

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    NEET Biology class 12th syllabus

    NEET Biology Class 12th syllabus

    NEET 2020 Biology Syllabus Class 12thWeightage
    Unit I – Reproduction14%
    Unit II – Genetics and Evolution7%
    Unit III – Biology and Human Welfare18%
    Unit IV – Biotechnology and its Applications12%
    Unit V – Ecology and Environment19%

    NEET Biology Class 12th Syllabus in detail

    Units Syllabus
    UNIT I: Reproduction

    • 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-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 (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 

    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 fingerprinting.

    • 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 III: Biology and Human Welfare

    • Health and Disease; Pathogens; parasites causing human diseases (Malaria, Filariasis, Ascariasis. Typhoid, Pneumonia, common cold, amoebiasis, ringworm); 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.

    CheckNEET Paper Analysis

    NEET Biology syllabus- Weightage of Important topics 

    NEET Biology syllabus- Weightage of Important topics 

    NEET 2020 will consist of a total 90 questions out of which half of the questions will be asked from Botany and other half for Zoology. Candidates can go through the table given below and get acquainted with the weightage of each topic.

    Botany: Topics like plant physiology, cell structure have higher weightage than others given below is a complete list of topics considered important for the exam along with weightage.

    NEET Botany TopicsNumber of QuestionsMarks allocatedWeightage (%age)

    Class 11th - Botany Topics

    Diversity in Living World4168.51%
    Living World14
    Plant Kingdom14
    Biological classification28
    Structural Organisation in Animals & Plants4168.51%
    Anatomy of Flowering Plant312
    Morphology in flowering plants14
    Cell Structure & Function72814.89%
    Cell Cycle and Division28
    Cell: The unit of life520
    Plant Physiology83217.02%
    Mineral Nutrition14
    Plant Growth and Development28
    Respiration in Plants28
    Transport in Plants312
    NEET Botany Questions & Weightage from Class 11th239248.94%
    Sexual Reproduction in flowering Plants4168.51%
    Genetics & Evolution104021.28%
    Principles of Inheritance and variation728
    Molecular basis of inheritance312
    Microbes in Human Welfare142.13%
    Ecology & Environment93619.15%
    Biodiversity and Conservation312
    Environmental Issues416
    Organisms and Population14
    NEET Botany Questions & Weightage from Class 12th249651.06%
    NEET Botany Questions & Weightage from Class 11th and 12th47188100.00%

    Zoology: Topics like human physiology, Reproduction and biology & human welfare have more weightage in the exam, aspirants can go through the table given below to know important topics for Zoology in NEET 2020.

    NEET Zoology TopicsNumber of QuestionsMarks AllocatedWeightage (%age)

    Class 11th - Zoology Chapters

    Animal Kingdom284.65%
    Structural Organisation in Animal284.65%
    Breathing and exchange of gases142.33%
    Human Physiology124827.91%
    Chemical Coordination28
    Digestion and Absorption28
    Excretory products and their elimination28
    Locomotion and Movement28
    Body Fluids and Circulation28
    Nervous System28
    NEET Zoology Questions & Weightage from Class 11th218448.84%

    Class 12th - Zoology Chapters

    Human Reproduction312
    Reproductive Health312
    Biology & Human Welfare83218.60%
    Human Health and Disease416
    Microbes in Human Welfare312
    Strategies for Enhancement in Food Production 114
    Biotechnology and its application28
    Biotechnology and its processes and principles312
    NEET Zoology Questions & Weightage from Class 12th228851.16%
    NEET Zoology Questions & Weightage from Class 11th& 12th43172100.00%

    CheckMobile Apps and Online Resources for Preparing NEET 2020

    Difficulty Level of NEET Chemistry Syllabus Questions

    Difficulty Level of NEET Chemistry Syllabus Questions

    As per the paper analysis from previous years the difficulty level of the paper is 

    • Almost 50% of the questions are easy to attempt

    • 36% of the questions are moderate

    • 14% of the questions are difficult to answer.

    SectionNumber of easy QuestionsNumber of Moderate QuestionsNumber of difficult Questions

    NEET Biology Sample Questions

    NEET Biology Sample Questions

    NEET biology questions are basically memory based with a lot of scientific terms involved and students must be well aware of it. In Depth questions will be asked from the related topics, below is the sample questions asked in NEET

    Ques 1. The endoplasmic reticulum in rapidly dividing cells is

    (a) absent

    (b) not functional

    (c) poorly developed

    (d) highly developed

    Answer: c

    Ques 2. This is related to glycosylation of protein

    (a) Lysosome

    (b) Peroxisome

    (c) Mitochondria

    (d) ER

    Answer: (d)

    NEET Biology Syllabus Content Based Lectures by NTA

    NEET Biology Syllabus Content Based Lectures by NTA

    NTA has provided video lecture facilities to candidates for preparation of NEET 2020, with the video lectures from Subject Experts. Candidates can access these videos by following these simple steps:

    • Visit the official website of NTA i.e.

    • Click on the “Students” tab/button. 

    • There you can see one option of “Content Based Lectures”. Click on that option.

    • You will be redirected to a new page where you can see subject wise options for video lectures.

    • Choose the subject of your choice to take the benefit of video lectures from experts.

    Check NEET Video Lectures by NTA

    NEET Biology Syllabus Mock Test 

    NEET Biology Syllabus Mock Test 

     NEET 2020 mock test is provided by NTA and can be accessed by visiting the official website of NEET i.e. 

    • Mock tests are available in online mode.

    • Candidates can directly access the page without having to register in order to take these mock tests. 

    • Candidates can also download the mock tests. 

    NEET 2020 mock test will help candidates to analyse their strong and weak areas. They can work upon the weaker topics after getting acquainted. The candidates can get an idea of the real time exam scenario. It will help them in managing their time while attempting the questions.

    How to Access NEET Biology syllabus Mock Tests?

    Follow the steps provided below to access the mock tests:

    • Visit the official website of NTA i.e.

    • Click on the “Students” tab/button.

    • There you can see 2 options - Mock Tests and Download Mock Test. 

    • To take the online mock test you have to click on that option and register yourself. 

    • In the second option you can directly download the mock tests by clicking on the link.

    Direct Link for NEET Mock Test by NTA

    Top reference books NEET Biology Syllabus

    Top reference books NEET Biology Syllabus

     NEET biology syllabus is totally based on the curriculum of NCERT and going through the NCERT books of class 11th and 12th is very important, but as the competition and difficulty level of the exam is increasing candidates need to get an extra bit of push by preparing with the help of reference books.Given below are the recommended books for NEET biology 

    TruemanBiology Vol 1 and Vol 2 
    AnsariObjective Botany 
    Pradeep publicationsPradeep Guide on Biology
    GR Bathla publicationsGR Bathla publications for Biology
    MTG Editorial BoardComplete NEET Guide: Biology

    Check:NEET Preparation Books

    Preparation Tips for NEET 2020 Biology

    Preparation Tips for NEET 2020 Biology

    The questions in Biology are basically based on scientific terms and memory based questions. According to the questions asked in previous years, most of the questions are easy to moderate. This means the candidates can score well with consistent preparation and following a routine. Along with that, the candidate must also follow some tips to prepare strategically to cover all the topics.Some proven tips are mentioned below that can fetch better results for the candidates.

    Tip 1: Divide syllabus according to the difficulty:

    Candidates can divide the sections or topics for preparation based on the difficulty level or number of questions asked from that particular section. 

    • High Priority Topics - The topics that have higher weightage in the exam should be kept in higher priority like cell structure, reproduction, human physiology,biology and human welfare. Lots of questions are asked and candidates should dedicate more time on them 

    • Medium priority Topics -The topics from which 15-20 questions are asked must be kept in medium priority and candidates should work after finishing the high priority topics. This includes topics from Diversity in living world, biomolecules,structural organisation in plants and animals

    • Low priority Topics- Around 2 to 10 questions can be asked from these topics: these topics include- biotechnology, strategy for enhancement in food production etc.

    Tip 2: Preparing Notes for Revision:

    • Sticky notes and self prepared notes are proven ways to prepare well.

    • Candidates should prepare handwritten notes for revision. 

    • Revision will help you in memorizing the topics for a longer period of time. 

    • Aspirants must note down all the important formulas, facts etc and revise them daily. 

    Tip 3: Practice Papers and Mock Tests:

    • With the help of practice papers or mock tests candidates can work upon the pace and precision of answering the questions. 

    • Candidates must focus on accuracy while practising questions they will gain speed. 

    • Mock Tests help dramatically in improving overall preparation and getting a desired result.

    PracticeNEET 2020 Mock Test

    Tip 4: Proper Time Management:

    • The candidates must prepare and follow a proper time table religiously.

    • The time table should include short breaks so that candidates can relax body and mind. 

    • Prepare a daily, weekly and monthly target and accomplish it on time. This method gives a feeling of reward and makes preparation interesting.

    Also see: 

    NEET Biology FAQs

    NEET Biology FAQs

    Question: What is the weightage of biology in NEET 2020?

    Ans. Biology has 50% weightage in NEET that means 90 out 180 questions are asked from biology and it is divided into botany and Zoology which have 45 questions each.

    Question: Has the syllabus for biology changed for NEET 2020?

    Ans. The syllabus of biology has NOT changed and it will remain the same for NEET 2020.

    Question: Which is the most important topic in biology?

    Ans. NTA designs the questions in such a way that it covers all the topics uniformly so candidates must prepare all the topics.

    Question: Does Zoology has more weightage than botany 

    Ans. Both Zoology and Botany have equal weightage in the exam. There can be minute diversion in the number of questions asked. But that differs from year to year.

    Question: Is class 12th biology syllabus more important than 11th biology syllabus?

    Ans. The weightage of syllabus is same for both class 11th and 12th. So candidates must give importance to topics from both class 11th and 12th syllabus.

    Question: Is preparing from NCERT books enough to clear NEET ?

    Ans. Preparation from NCERT is important because NTA follows the syllabus prescribed by NCERT. But to score better marks candidates need to refer from advanced syllabus from different reference books.

    Question: What are the best books to prepare for NEET biology syllabus?

    Ans. There are lot of reference books available to prepare for NEET biology, some famous books are

    • Biology Vol 1 and Vol 2 by Trueman

    • Pradeep Guide on Biology

    • Complete NEET Guide: Biology

    *The article might have information for the previous academic years, which will be updated soon subject to the notification issued by the University/College


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