NEET Biology Syllabus 2025, Important Zoology, Botany Chapters of Class 11, 12 with Weightage

Table of Contents

Understanding the NEET Biology Syllabus 2025 along with chapter weightage can help students prioritize relevant topics. The biology part contains 90 questions covering Botany and Zoology. The NTA revised the biology NEET UG syllabus last year. However, the most recent NEET 2025 syllabus for biology has added some new topics to the NCERT syllabus. We have prepared the comprehensive NEET 2025 Biology syllabus that covers a wide range of topics for classes 11 and 12.

NEET Biology Syllabus 2025

It is critical to study and review the biology NEET syllabus 2025 properly. As biology is an extremely important subject for the NEET exam. Biology accounts for roughly half of the questions on this exam, therefore students must grasp this topic to increase their total marks. Completing the syllabus requires disciplined learning and perseverance with the appropriate approach.

NEET 2025 Biology Syllabus Overview

Biology has a significant impact on applicants’ overall exam performance. Mastering NEET 2025 requires a complete comprehension of the Biology syllabus, with a concentration on all of the major topics covered. Have an overview of the NEET Biology syllabus below –

NEET Biology Class 11 Syllabus 2025

The NEET syllabus 2025 for biology for Class 11 is very important in preparing. Here is an overview of the NEET syllabus 2025 for biology for Class 11.

Unit Name	Chapters/ Topics
Unit 1 – Diversity of Living Organisms Change	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 (three to five salient and distinguishing features and at least two examples of each category); Salient features and classification of animals non chordate up to phyla level and chordate up to classes level (three to five salient features and at least two examples)’
Unit 2 – Structural Organization in Plants & Animals Change	Morphology and modifications; Tissues; Anatomy and functions of different parts of flowering plants: Root, stem, leaf, inflorescence- cymose and racemose, flower’ fruit and seed 1 To be dealt along with the relevant practical of the Practical Syllabus) Family (malvaceae, Cruciferae, leguminoceae, compositae, gramineae)’ Animal tissues; Morphology, anatomy, and functions of different systems (digestive, circulatory, respiratory, nervous, and reproductive) of an insect (Frog)’ (Brief account only)
Unit 3 – Cell Structure and Function No Change	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 organelle structure and function; Endomembrane system-endoplasmic reticulum’ Golgi bodies’ lysosomes, vacuoles; mitochondria, ribosomes, plastids, microbodies; Cytoskeleton’ cilia flag”lla 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’ classification and nomenclature of enzymes B Cell division: Cell cycle, mitosis, meiosis, and their significance
Unit 4 – Plant Physiology	Photosynthesis: Photosynthesis as a means of Autotrophic nutrition; Site of photosynthesis takes 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, differentiation, and redifferentiation; Sequence of developmental process in a plant cell; Growth regulators auxin, gibberellin, cy. cytokinin, ethylene, ABA;
Unit 5 – 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 in 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 human 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 (Elementary idea); Role of hormones as messengers and regulators, Hypo-and hyperactivity and related disorders (common disorders e.g. Dwarfism, Acromegaly, Cretinism, goiter, exophthalmic goiter, diabetes, Addison’s disease).

NEET Biology Class 12 Syllabus 2025

It covers a variety of topics including human reproduction, evolution, ecology, biotechnology, genetics, and others. The NEET 2025 biology syllabus for Class 12 emphasizes building on the foundational concepts presented in Class 11 while also delving into more complex themes and principles in biology. The redesigned NEET 2025 biology syllabus contains the main themes and subtopics.

Unit Name	Unit Topics
Unit 6 – 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 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 7 – Genetics & Evolution	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-i-n humans’ birds, honey bee; Linkage and crossing over; Sex-linked inheritance-Haemophilia color 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, 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 (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 8 – Biology and Human Welfare	Health and Disease; Pathogens; parasites causing human diseases (Malaria, Filariasis, Ascariasis. Typhoid, Pneumonia, common cold, amoebiasis, ring worm, 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.
Unit 9 – 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, gens therapy Genetically modified:organisms-Br crops: Transgenic Animals Biosafety issues-Biopiracy and patents.
Unit 10 – Ecology and Environment	organisms and environment Population intentions-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.

NEET Zoology Syllabus 2025 with Weightage

The NEET zoology syllabus 2025 with weightage provides a comprehensive framework for assessing students’ skill and understanding of zoology through five major themes. Candidates should become aware with the chapter-by-chapter weighting distribution of marks for the NEET Syllabus 2025 before beginning their preparation. The NEET zoology syllabus 2025 is intended to examine candidates’ understanding of many zoological topics, including animal categorization, structural structure, cell biology, and human physiology.

Chapters/Topics	Weightage (%)	Average No. of Questions asked ( Based on 5 Years Analysis)
Structural Organisation in Animals (Animal Tissues)	8%	4
Locomotion and Movement	6%	3
Body Fluids and Circulation	5%	2
Evolution	6%	3
Biomolecules	10%	5
Human Reproduction	6%	3
Breathing and Exchange of Gases	4%	2
Excretory Products and their Elimination	5%	2
Reproductive Health	8%	4
Biotechnology – Principles and Processes	12%	6
Human Health and Disease	6%	3
Biotechnology and its Applications	7%	4
Animal Kingdom	13%	7
Neural Control and Coordination	2%	1
Chemical Coordination and Integration	4%	2

NTA NEET Biology Syllabus PDF 2025

Students can understand topic additions and removals by downloading the Biology Syllabus PDF and familiarizing themselves with the new NEET 2025 biology syllabus. Understanding the NEET biology syllabus helps students categorize topics according to their value and prepares them for the exam. Download the official pdf from the below link.

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NEET Botany Syllabus 2025 with Weightage

The NEET botany syllabus for 2025 covers a wide range of plant-related topics. It is organized into four major sections: biochemistry, cell biology, genetics, and ecology. The following are the key subjects and the marks allotted to each chapter of the NEET 2025 Botany Syllabus, which is necessary for good study planning.

Chapters/Topics	Weightage (%)	Average No. of Questions asked ( Based on 5 Years Analysis)
Biodiversity and Conservation	4%	2
Anatomy of Flowering Plants	7%	3
Cell : The Unit of Life	5%	2
Respiration in Plants	4%	2
Microbes in Human Welfare	4%	2
Cell Cycle and Cell Division	9%	4
Molecular Basis of Inheritance	14%	6
Principles of Inheritance and Variation	10%	5
Sexual Reproduction in Flowering Plants	6%	3
Ecosystem	4%	2
Morphology of Flowering Plants	6%	3
Plant Growth and Development	6%	3
The Living World	1%	0
Plant Kingdom	7%	3
Biological Classification	3%	1
Organisms and Populations	4%	2
Photosynthesis in Higher Plants	4%	2

Biology Important Chapters for 2025

It is recommended that applicants focus their studies on specific core biology subjects from the NEET botany curriculum 2025 and NEET Zoology syllabus 2025 for NEET UG 2025, as decided by the frequency and weightage of questions in previous years’ tests. These topics are extremely important because they appear frequently in the biology syllabus for the NEET 2025 exam. If you truly learn and master these concepts, your biological foundation will be strengthened, increasing your chances of success in the NEET exam. Here are the essential subjects to focus on during NEET preparation:

NEET 2025 Syllabus Important Topics
Botany		Zoology
Chapter Name	Topics	Chapter Name	Topics
Cell – The Unit of Life	CELL THEORY AN OVERVIEW OF CELL PROKARYOTIC CELLS EUKARYOTIC CELLS	Chapter Name	Topics
Cell Cycle and Cell Division	CELL CYCLE Phases of Cell Cycle Significance of Mitosis MEIOSIS I MEIOSIS MEIOSIS II Significance of Meiosis	Structural Organization in Animals (including Frog)	Tissues Epithelium Tissue Cell Junctions Connective Tissue Muscular Tissue Nervous Tissue Cockroach Frog
The Living World	WHAT IS ‘LIVING’? DIVERSITY IN THE LIVING WORLD Binomial nomenclature TAXONOMIC CATEGORIES	Biomolecules	Method to analyze chemical composition Metabolites Micromolecules Macromolecules Carbohydrates Amino acids Proteins Lipids Nucleic acids RNA DNA Dynamic state of body constituents The living state Enzymes
Biological Classification	Types of Classification KINGDOM MONERA KINGDOM PROTISTA KINGDOM FUNGI KINGDOM PLANTAE KINGDOM ANIMALIA acellular organisms Symbiotic organisms	Breathing and Exchange of Gases	Introduction to breathing and respiration Respiratory organs Human respiratory system Mechanism of breathing Respiratory volumes and capacities Exchange of gases Transportation of gases Regulation of respiration Disorders of Respiratory System
Plant Kingdom	Classification system Taxonomy ALGAE BRYOPHYTES PTERIDOPHYTES GYMNOSPERMS	Body Fluids and Circulation	Introduction to body fluids Blood Plasma Formed elements Blood Groups Coagulation of Blood Lymph Circulatory Pathways Double Circulation Coronary Circulation Human Circulatory System Heart Sounds Blood Vessels Portal system ECG Regulation of Cardiac Activity Disorders of Circulatory System
Morphology of Flowering Plants	THE ROOT THE STEM THE LEAF THE FLOWER THE FRUIT THE SEED SEMI-TECHNICAL DESCRIPTION OF A TYPICAL FLOWERING PLANT DESCRIPTION OF SOME IMPORTANT FAMILIES	Excretory Products & their Elimination	Excretion Excretory Products Excretory Structures Human Excretory System Nephron Mechanism of Urine formation Mechanism of Concentration of the Filtrate Micturition Urine Role of Other Organs in Excretion Regulation of Kidney Function – Kidney Regulation of Kidney Function – Hypothalamus Regulation of Kidney Function – Adrenal cortex Regulation of Kidney Function – Adrenal medulla Regulation of Kidney Function – Heart Regulation of GFR Disorders of the Excretory System Treatment for renal failure
Anatomy of Flowering Plants	THE TISSUES Simple Tissues Complex Tissues THE TISSUE SYSTEM Anatomy of Plants	Locomotion & Movement	Locomotion and movement Locomotory organs Types of Movement Muscles Types of Muscle Skeletal muscles Structure of contractile proteins Mechanism of Muscle Contraction Mechanism of Muscle Relaxation Red & White Muscles Skeletal system Axial skeleton Appendicular skeleton Joints Disorders related to muscular system
Photosynthesis in Higher Plants	EARLY EXPERIMENTS WHERE DOES PHOTOSYNTHESIS TAKE PLACE? HOW MANY TYPES OF PIGMENTS ARE INVOLVED IN PHOTOSYNTHESIS? WHAT IS LIGHT REACTION? Dark Reaction THE C4 PATHWAY PHOTORESPIRATION FACTORS AFFECTING PHOTOSYNTHESIS	Neural Control & Coordination	Control and coordination Neural system Human neural system Neuron Generation and conduction of nerve impulse Transmission of Impulses Synapse Neurotransmitters Central nervous system(CNS) Human Brain Spinal cord
Respiration in Plants	RESPIRATION IN PLANTS GLYCOLYSIS FERMENTATION AEROBIC RESPIRATION THE RESPIRATORY BALANCE SHEET AMPHIBOLIC PATHWAY RESPIRATORY QUOTIENT	Chemical Coordination & Integration	Neural system and Endocrine system Endocrine glands Hormones Hypothalamus Pituitary gland/Hypophysis Pineal gland/body Thyroid gland Parathyroid gland Thymus gland Adrenal gland Pancreas Gonads Hormones of Gastrointestinal Tract Hormones of Heart Hormones of Kidney Non-endocrine tissues Hormonal Feedback Hormonal action
Plant Growth and Development	GROWTH Growth Rates DIFFERENTIATION, DEDIFFERENTIATION AND REDIFFERENTIATION DEVELOPMENT PLANT GROWTH REGULATORS	Animal Kingdom	Taxonomy Kingdom-Animalia Basis of Classification Phylum- Porifera Phylum- Coelenterata/Cnidaria Phylum- Ctenophora “Phylum- Platyhelminthes Phylum- Aschelminthes/ Nemathelminthes” Phylum-Annelida Phylum-Arthropoda Phylum- Mollusca Phylum- Echinodermata Phylum- Hemichordata Phylum-Chordata Subphyla- Urochordata Subphyla- Cephalochordata Subphyla- Vertebrata Class- Cyclostomata Superclass- Pisces (Class- Chondrichthyes) Superclass- Pisces (Class- Osteichthyes) Superclass- Tetrapoda (Class – Amphibia) Superclass- Tetrapoda (Class – Reptiles) Superclass- Tetrapoda (Class – Aves) Superclass- Tetrapoda (Class – Mammalia)
Sexual Reproduction in Flowering Plant	FLOWER – A FASCINATING ORGAN OF ANGIOSPERMS PRE-FERTILISATION: STRUCTURES AND EVENTS Pollen grain Female gametophyte Pollination POST-FERTILISATION: STRUCTURES AND EVENTS Embryo Seed Fruit APOMIXIS AND POLYEMBRYONY	Human Reproduction	Human reproductive system Male reproductive system Female reproductive system Spermatogenesis semen Structure of sperm Oogenesis Differences between spermatogenesis and oogenesis Ovum Menstrual cycle Fertilisation & Implantation Sex Determination of Foetus Pregnancy & embryonic development Parturition & Lactation
Principle of Inheritance and Variation	Genetics MENDEL’S LAWS OF INHERITANCE INHERITANCE OF ONE GENE INHERITANCE OF TWO GENES POLYGENIC INHERITANCE PLEIOTROPY SEX DETERMINATION MUTATION GENETIC DISORDERS Mendelian Disorders Chromosomal Disorders	Reproductive Health	Reproductive health Population Contraceptive methods Medical termination of pregnancy Sexually transmitted diseases(STDs) Infertility Assisted reproductive technologies(ARTs)
Molecular Basis of Inheritance	THE DNA THE SEARCH FOR GENETIC MATERIAL RNA WORLD THE DNA DNA Replication TRANSCRIPTION GENETIC CODE RNA– the Adapter Molecule TRANSLATION REGULATION OF GENE EXPRESSION HUMAN GENOME PROJECT DNA FINGERPRINTING	Evolution	Origin of life Theory of origin of life Evolution Evidences of evolution Adaptive radiation Natural selection and artificial selection Theory of organic evolution Hardy-weinberg principle Speciation and isolation A brief account on evolution Origin and evolution of man
Microbes in Human Welfare	MICROBES IN HUMAN WELFARE MICROBES IN SEWAGE TREATMENT MICROBES IN PRODUCTION OF BIOGAS MICROBES AS BIOCONTROL AGENTS MICROBES AS BIOFERTILISERS	Human Health and Diseases	Introduction Common Diseases in Humans Protozoan Disease Immunity Innate immunity Acquired immunity Lymphoid organs Immunization Vaccination Transplantation Auto-immunity AIDS Cancer Drug abuse Alcohol abuse Adolescence Addiction and dependence
Organisms and Population	ORGANISM AND ITS ENVIRONMENT POPULATIONS Population Growth Life History Variation Population Interactions	Biotechnology: Principles & Processes	Principles of biotechnology Genetic engineering/Recombinant DNA technology Tools of rDNA technology Isolation of DNA Separation and isolation of DNA fragments Amplification of gene of interest Insertion of rDNA into host cell Obtaining the foreign gene product GMOs Biotechnological applications in agriculture Biotechnological applications in medicine Transgenic animals Ethical issues
Ecosystem	ECOSYSTEM – STRUCTURE AND FUNCTION ENERGY FLOW ECOLOGICAL PYRAMIDS
Biodiversity and Conservation	BIODIVERSITY Patterns of Biodiversity Loss of Biodiversity BIODIVERSITY CONSERVATION Why Should We Conserve Biodiversity? BIODIVERSITY CONSERVATION

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