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NEET 2024 Biology Syllabus  - Class-wise Topics & Chapter-wise Weightage for NEET Biology 

NEET 2024 Biology Syllabus: The National Eligibility Entrance Test, known as NEET, is a qualifying exam through which students can take admissions in various medical courses like MBBS and BDS in several medical and dental colleges in India. NEET is conducted by the National Test Agency (NTA).

A candidate must pass Physics, Chemistry, and Biology/Biotechnology as their compulsory subjects in 11th and 12th to be eligible for NEET 2024. Knowing the NEET 2024 Syllabus of every subject well in advance helps students prepare well for the NEET exam. Students must thoroughly read the NEET Biology syllabus to prepare for the NEET 2024 exam and score excellent marks. Biology is one of the important subjects that come in NEET exams. In addition, the correct answers in Biology are the deciding factor in the NEET ranks if two or more candidates have scored the same marks. NEET Biology syllabus contains topics after considering various state boards, like CBSE, NIOS, COBSE, and ICSE. Therefore, all the candidates must check the syllabus, which chapters hold more weightage from the NEET 2024 Biology syllabus in the NEET 2024 exam.

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NEET Biology syllabus 2024– Class-wise

Class 11th Syllabus

Class 12th Syllabus

Diversity in the Living World


Structural organization – Plants and Animals

Genetics and Evolution

Cell Structure and Function

Biology and Human Welfare

Plant Physiology

Biotechnology and its applications

Human physiology

Ecology and environment

NEET Biology Syllabus 2024 – Chapter-wise

The NEET Biology 2024 syllabus is divided according to different chapters. The candidates must prepare every topic from class 11th and 12th Biology for their preparation to score outstanding marks in the NEET exam. The list of topics according to the chapters are listed below:

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Class 11th Chapter NEET 2024 Biology Syllabus

Unit 1 – Diversity in Living World

Biodiversity; Need for classification; Three domains of life; Taxonomy & Systematics; Concept of species and taxonomic hierarchy; Binomial nomenclature; Tools for study of Taxonomy
Herbaria, Botanical gardens; Five kingdom classification; Salient features and classification of plants; Salient features and classification of animals

Unit 2 – Structural Organisation in Animals and Plants

Morphology and modifications; Tissues; Anatomy and functions of different parts of flowering plants; Animal tissues;
Morphology, anatomy and functions of different systems

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; Chemical constituents of living cells: Biomolecules; Cell division

Unit 4 – Plant Physiology

Transport in plants; Long distance transport of water; Transpiration-Opening and closing of stomata; Uptake and translocation of mineral nutrients; Diffusion of gases Mineral nutrition; Deficiency symptoms; Mineral toxicity; Elementary idea of Hydroponics; Nitrogen metabolism-Nitrogen cycle, biological nitrogen fixation Photosynthesis; Site of photosynthesis take place; Photochemical and biosynthetic phases of photosynthesis; Cyclic and non-cyclic and photophosphorylation; Chemiosmotic hypothesis; Photorespiration C3 and C4 pathways; Factors affecting photosynthesis Respiration; Cellular respiration; Energy relations-Number of ATP molecules generated; Amphibolic pathways; Respiratory quotient
Plant growth and development; Differentiation, dedifferentiation and Redifferentiation; Sequence of developmental process in a plant cell; Growth
Regulators; Vernalisation; Photoperiodism

Unit 5 – Human Physiology

Digestion and absorption; Egestion; Nutritional and digestive disorders Breathing and Respiration; Respiratory system in humans; Mechanism of breathing and its regulation in humans; Disorders related to respiration-Asthma, Emphysema, Occupational respiratory disorders

Body fluids and circulation; Human circulatory system; Regulation of cardiac activity; Disorders of circulatory system- Hypertension, Coronary artery disease, Angina pectoris, Heart failure
Excretory products and their elimination; Human excretory system; Urine formation, Osmoregulation; Regulation of kidney function-Renin-angiotensin, Atrial Natriuretic Factor, ADH, and Diabetes insipidus; Disorders; Uraemia, Renal failure, renal calculi, Nephritis; Dialysis and artificial kidney

Locomotion and Movement; Skeletal system and its functions; Joints; Disorders of muscular and skeletal system-Myasthenia Gravis, Tetany, Muscular dystrophy, Arthritis, Osteoporosis, Gout
Neural control and coordination; 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; 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

Class 12th Chapter-Wise NEET 2024 Biology Syllabus

Unit 1 – Reproduction

Reproduction in organisms; Asexual reproduction; Modes
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; Microscopic anatomy of testis and ovary; Gametogenesis-spermatogenesis & oogenesis; Menstrual cycle; Fertilisation, embryo development upto blastocyst formation, implantation; Pregnancy and placenta formation; Parturition; Lactation
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 2 – Genetics and Evolution

Heredity and variation: Mendelian 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 evidences for biological evolution from Paleontology, comparative anatomy, embryology and molecular evidence); Darwin’s contribution, Modern Synthetic Theory of Evolution; Mechanism of evolution; Gene flow and genetic drift; Hardy-Weinberg’s principle; Adaptive Radiation; Human evolution

Unit 3 – Biology and Human Welfare

Health and Disease; 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, Bio fortification; Apiculture and Animal husbandry
Microbes in human welfare: In household food processing, industrial production, sewage treatment, energy generation and as biocontrol agents and bio fertilizers

Unit 4 – Biotechnology and Its Applications

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-Bio piracy and patents

Unit 5 – Ecology and environment

Organisms and environment; Population interactions-mutualism, competition, predation, parasitism; Population attributes-growth, birth rate and death rate, age distribution Ecosystem; Energy flow
Pyramids of number, biomass, energy; Nutrient cycling; Ecological succession; Ecological Services-Carbon fixation, pollination, oxygen release Biodiversity and its conservation; 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 warming; Ozone depletion; Deforestatio

NEET 2024 Biology Chapterwise Weightage


Approximate Weightage

Diversity of Living Organisms


Structural Organisation in Plants & Animals


Cell: Structure and Function


Plant Physiology


Human Physiology




Genetics and Evolution


Biology and Human Welfare


Biotechnology and its Applications


Ecology and Environment


No. of Questions asked in Botany in the last 12 years

Chapter Name

Grand Total

Molecular Basis of Inheritance


Reproduction in Organisms and Sexual Reproduction in Flowering Plants


Principles of Inheritance and Variation


Cell : The Unit of Life


Morphology of Flowering Plants


Biological Classification


Plant Kingdom


Anatomy of Flowering Plants


Cell Cycle and Cell Division


Environmental Issues




Biodiversity and Conservation


Microbes in Human Welfare


Organisms and Populations


Plant Growth and Development


Photosynthesis in Higher Plants


Transport in Plants


Mineral Nutrition


Respiration in Plants


Strategies for Enhancement in Food Production


The Living World


No. of Questions asked in Zoology in the last 12 years


Chapter Name

Grand Total


Biotechnology - Principles and Processes



Reproduction in Organism & Human Reproduction



Animal Kingdom









Human Health and Disease



Structural Organisation In Animals



Body Fluids and Circulation



Biotechnology and its applications



Digestion and Absorption



Reproductive Health



Neural control and coordination



Chemical Coordination & Integration



Breathing and Exchange of Gases



Locomotion and Movement



Excretory Products and their Elimination



Strategies for Enhancement in Food Production - Animal Husbandry


NEET 2024 Biology Important Topics

One of the most important parts of NEET exam preparation is knowing the syllabus and important chapters for the exam. The NEET Biology section carries the maximum weightage compared to NEET Chemistry and NEET Physics. NEET Biology comprises 90 questions, which are further divided into Botany (40-45 Questions) and Zoology (40-45 Questions). We have compiled a list of some of the important concepts from the NEET 2024 syllabus released by the NTA. You can go through these important concepts to revise and prepare for your upcoming NEET examination.



Cell Wall


Morphology in Flowering Plants

Cell Organelles

Biological Systems of Classification Branches of Taxonomy

Morphology of Root and Its Types

Endomembrane System

Taxonomic Aids

Morphology in Flowering Plants

Nuclear Membrane

Scientific Names of Plants and Animals

Chapter Anatomy of Flowering Plants

Chromosome and Chromatids


Anatomy of Roots


Kingdom Monera

Anatomy of Stem



Cell Organelles

Contractile Proteins

Kingdom Fungi

Cell the Basic Unit of Life

Diffusion Means of Transport Biology

Habitat of Fungi

What Is a Cell


Algae and Fungi

An Overview of Cell

Passive Transport

Reproduction in Fungi

Cell Structure and Function

Introduction Hydroponics and the Study of Mineral Requirements of the Plants


Cell Theory and Its Modification





Pteridophytes Alternation of Generations

Prokaryotic Cell

Aerobic Anaerobic Respiration


Eukaryotic Cell

Seed Germination

Phaeophyceae and Rhodophyceae


Alimentary Canal


Cell Envelopes and Cell Membrane Invagination

Internal Anatomy Alimentary Canal


Cytoplasm and Cell Membrane

Human Digestive System

Difference Between Gymnosperms and Angiosperms

Cell Wall and Cell Membrane


Disorders of Respiratory System

Regulation of Respiration

Movement and Locomotion

Chapter Breathing and Exchange of Gases

Blood and Plasma

Cilia and Flagella

Human Respiratory System

Human Heart

Endocrine System Ductless Gland

NEET 2024 Related Links

NEET Chemistry Paper Analysis 2024

NEET Physics Paper Analysis 2024

NEET 2024 Cut Off

NEET Biology Paper Analysis 2024

NEET Preparation

NEET Rank Predictor 2024

NEET 2024 Paper Analysis 

NEET Dress Code

NEET 2024 Counselling

Frequently Asked Questions on the NEET 2024 Biology Syllabus

Ques 1: Can I leave some topics while preparing for the NEET exam from the NEET Biology syllabus?
Answer: No, an aspirant must not leave any topic from the NEET Biology syllabus. In addition, more correct answers in Biology help candidates get a higher rank if two or more candidates have secured the same marks.

Ques 2: How to prepare so many topics from the NEET Biology syllabus?
Answer: Aspirants must complete all the topics one to two months before the NEET exam to get sufficient time for revision. In addition, making short notes for every chapter and revising them helps retain the concepts in mind for a longer time.

Ques 3: Is it necessary to take a NEET Mock Test for Biology syllabus?
Answer: Yes, candidates must take mock tests weeks before the main NEET exam. It helps in time management, strategizing which section to attempt first, and creating a balance between easy and tough questions. Candidates must take mock tests like real NEET exams.

Ques 4: Which chapter holds maximum weightage in the NEET Biology Syllabus?
Answer: Human psychology, reproduction, genetics, and evolution hold the maximum weightage in the NEET Biology syllabus. However, the candidate must prepare every chapter thoroughly as questions can come from any chapter irrespective of the weightage.

Ques 5: Where can I get a free NEET mock test?
Answer: Candidates can register for the NEET mock test for free at Aakash Byju's website. The NEET 2024 Mock Test Series is formulated by our academic experts and is designed based on the original pattern of the NEET exam. It will help candidates strategize better for the NEET preparation and score high in the exam.

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