NEET Biology Notes 2026 - Download PDFs PDF Download

NEET Biology is a crucial part of the exam as it is a high-scoring subject if the students are well-prepared. The questions from this topic are comprehensive and a student who has studied it properly can easily pass this section of NEET.
With the NEET examination rapidly approaching, students have been putting in their best efforts to prepare for it. One of the essential components of preparation is making notes which can be time-consuming if done by referring to different sources. We are providing NEET Notes in one place in accordance with the latest NCERT syllabus and suitable for the 2023 NEET exam.

NEET Biology is a critical factor in student success on the exam; however, it is still necessary to pay attention to the other two subjects. To be admitted to a top medical or dental college, students should strive to master both Biology, Physics and Chemistry. The difficulty level of Biology has increased over the years

• The 2019 NEET exam was determined to be of average difficulty, with Biology being the easiest section, followed by Chemistry, and Physics the most difficult. 
• The 2021 NEET Biology section was judged to be between easy and moderate in terms of difficulty. 
• NEET 2022 Difficulty Level was moderate to difficult for Botany & Moderate for Zoology.

When it comes to NEET Biology, the botany section was comparatively challenging. Most of the questions in botany were based on NCERT. Zoology, on the other hand, fared moderately on the difficulty meter. Most questions appeared from the Human Physiology unit.
Also Check: 

• Topic-wise MCQ Tests for NEET Class 11
• Topic-wise MCQ Tests for NEET Class 12
• Flashcards for NEET
• NEET Past Year Papers

Making notes for NEET is a great way to save time and create an easier learning experience for students. This EduRev article will provide effective notes for the Botany, and Zoology sections of NEET, so that students can make the most out of their study time.

Important Notes of Class 11 Biology

The Living World

• Taxonomy: Identification, Nomenclature & Classification
• What is Living & its Characteristics
• Taxonomical Categories & Taxonomical Aids
• Need for Classification & Three Domains of Life
• Important Notes for NEET: The Living World

Biological Classification

• Kingdom Protista: Euglenoids, Slime Moulds & Protozoans
• Important Notes for NEET: Biological Classification
• Kingdom Monera: Archaebacteria & Eubacteria
• Kingdom Fungi
• Detailed Summary: Biological Classification
• Kingdom Protista: Chrysophytes and Dinoflagellates
• Viruses, Viroid & Lichens
• Detailed NCERT Notes: Biological Classification

Plant Kingdom

• Algae: Chlorophyceae (Green Algae)
• Bryophytes: Plant Kingdom
• Summary: Plant Kingdom
• Algae: Phaeophyceae (Brown Algae) & Rhodophyceae (Red Algae)
• 7 days Study Plan: Plant Kingdom
• Pteridophytes
• Gymnosperms
• Angiosperms
• Plant Life Cycles & Alternation of Generations
• Important Notes for NEET: Plant Kingdom
• Lichens & Mycorrhiza
• NCERT Notes: Plant Kingdom
• Classification Systems

Animal Kingdom

• Phyla - Porifera & Coelenterata
• Chapter Notes: Animal Kingdom
• 11 days Study Plan: Animal Kingdom
• Class - Aves
• Phylum - Aschelminthes (Nematoda)
• Phyla - Platyhelminthes & Annelida
• Phylum Chordata & Its Classification
• Phyla - Echinodermata & Hemichordata
• Phylum - Aschelminthes (Nematoda)
• Sub-phylum - Vertebrata
• Super Class - Pisces (Chondrichthyes & Osteichthyes)
• Class - Amphibia, Reptilia & Mammalia
• Phylum - Ctenophora
• Phyla - Arthropoda & Mollusca
• Symmetry, Diploblastic & Triploblastic Organisation
• Coelom, Segmentation & Notochord

Morphology of Flowering Plants

• The Root: Types, Regions & Modifications
• Important Notes for NEET: Morphology of Flowering Plants
• 9 days Study Plan: Morphology of Flowering Plants
• Morphology of Flowering Plants
• The Flower: Parts & Functions
• Semitechnical Description of a Flowering Plant & Some Important Families
• Venation & Modification of Leaves
• The Inflorescence
• The Fruit: Parts, Structure, Uses & Classification
• The Stem & Its Modifications
• The Leaf: Types of Leaves, Phyllotaxy, Venation & Modifications of Leaves
• Seed: Development, Types & Germination
• Detailed Notes: Angiosperms
• Key notes: Morphology of Flowering Plants
• Family Description: Solanaceae, Fabaceae & Liliaceae

Anatomy of Flowering Plants

• Anatomy of Monocot & Dicot Stem
• Anatomy of Monocot & Dicot Root
• Anatomy of Leaf
• Plant Tissue System
• Types & Characteristics of Meristematic Tissue
• Parenchyma: Permanent Tissues
• Complex Permanent Tissue
• Secondary Growth
• Key Notes: Anatomy of Flowering Plants

Structural Organisation in Animals

• Epithelial Tissue
• Important Notes for NEET: Structural Organization in Animals
• Earthworm: Shape & Body Structure
• Connective Tissue
• Stratified Epithelial Tissue
• Earthworm: Morphology & Anatomy
• Glands
• Cockroach: Morphology & Anatomy
• Muscular Tissue
• Frog: Morphology & Anatomy
• Skeletal System
• Integumentary System
• Glossary: Structural Organisation in Animals
• Nervous Tissue

Cell - The Unit of Life

• Prokaryotic Cells: Characteristics, Reproduction & Examples
• Important Notes for NEET: Cell: The Unit of Life
• Cell Organelles
• Introduction to Cell & Cell Theory
• Overview: Eukaryotic Cells
• Prokaryotic Cells: Cell Envelope & Components of Bacterial Cell
• Mitochondria & Plastids
• Cell Wall, Cell Membrane & Plasma Membrane
• Endomembrane System
• Nucleus & Chromosomes
• Nucleus & Nucleolus
• Centriole & Centrosome
• Ribosomes, Cilia, Flagella, Cytoskeleton & Microbodies

Biomolecules

• Protoplasm
• How to analyze the Chemical Composition of a Compound?
• Important Notes for NEET: Biomolecules
• Carbohydrates
• Derivatives of Monosaccharides
• Protein
• Primary & Secondary Metabolites
• Nature of Bond Linking Monomers in a Polymer
• Enzymes
• Nucleic Acids (DNA & RNA)
• Nucleic Acids: Structure & Bonding
• Lipids: Fatty Acids & Phospholipids

Cell Cycle and Cell Division

• Cell Cycle & Mitosis
• Key Notes: Cell Cycle & Cell Division
• Meiosis: Types, Stages & Significance
• Mitosis: Features, Stages, Functions & Significance

Transport in Plants

• Diffusion in Plants
• Facilitated Diffusion
• Osmosis
• Imbibition & Plasmolysis
• Transpiration Pull & Stomata
• Key Notes: Transport in Plants
• Water Potential & Pressure Potential
• Absorption of Water
• Long Distance Transport of Water

Mineral Nutrition

• Essential Mineral Elements
• Nitrogen Metabolism
• Key Notes: Mineral Nutrition
• Nitrogen Fixation
• Minerals Chart

Photosynthesis in Higher Plants

• Photosynthesis: Pigments Involved in Photosynthesis
• Early Experiments on Photosynthesis
• Key Notes: Photosynthesis in Higher Plants
• Photosynthesis: Site, Type, & Factors Affecting
• Light Reactions & Electron Transport
• Calvin Cycle
• C4 Pathway: Hatch & Slack Pathway
• Introduction of Photorespiration

Respiration in Plants

• Introduction: Respiration in Plants
• Krebs Cycle or Citric Acid Cycle: Steps, Products & Significance
• Key Notes: Respiration in Plants
• Glycerol-Phosphate Shuttle System
• Chemiosmotic Hypothesis
• Fermentation: Alcohol & Lactic Acid
• Enzymes & Factors Affecting Respiration

Plant - Growth & Development

• Phases of Growth
• Auxins
• Abscisic Acid
• Gibberellins
• Cytokinins
• Key Notes: Plant Growth & Development
•  Plant Growth Regulators

Digestion & Absorption

• Alimentary Canal: Mouth, Pharynx & Oesophagus
• Digestive Gland: Pancreas & Salivary Glands
• Digestive Gland: Liver
• Absorption of Digested Products & Disorders of Digestive System
• Digestion of Food
• Important Notes for NEET: Digestion & Absorption
• Alimentary Canal: Stomach, Small Intestine & Large Intestine

Breathing and Exchange of Gases

• Mechanism of Breathing
• Exchange & Transport of Gases
• Human Respiratory System
• Key Notes: Breathing & Exchange of Gases
• Regulation of Respiration & Respiratory Disorders

Body Fluids and Circulation

• Blood Vessels
• Important Notes for NEET: Body Fluids & Circulation
• Blood: Body Fluids & Circulation
• Introduction: Circulatory System
• Double Circulation & Regulation of Cardiac Activity
• Lymphatic System
• Human Circulatory System
• Disorders of Circulatory System
• Cardiac Cycle & ECG
• Venous System & Portal System

Excretory Products and their Elimination

• Elimination: Nitrogenous Wastes
• Counter Current Mechanism
• Human Excretory System & Structure of Kidneys
• Nephrons
• Mechanism: Urine Formation
• Key Notes: Excretory Products & their Elimination

Locomotion and Movement

• Muscles: Skeletal, Cardiac & Smooth Muscles
• Movement & Its Types
• Key Notes: Locomotion & Movement
• Muscle: Sliding Filament Theory & Contractile Proteins
• Human Skeletal System
• Joints & Its Types
• Disorders of Muscular & Skeletal System

Neural Control and Coordination

• Types of Neurons
• Synapse & Synaptic Transmission
• The Human Brain
• Structure of Spinal Cord
• Key Notes: Neural Control & Coordination

Chemical Coordination and Integration

• Endocrine System, Nervous System & Hormonal Reactions
• Pituitary Gland
• Pineal Body & Pancreas
• Posterior Lobe & Thyroid Gland
• Parathyroid Gland
• Thymus Gland
• Key Notes: Chemical Coordination & Integration
• Adrenal Gland
• Testes, Ovaries & Other Hormone Secreting Organs
• Receptors & Human Eye
• The Tongue & Ear

Important Notes of Class 12

Reproduction in Organisms

• PPT: Reproduction in Organisms
• Parthenogenesis & Its Types
• Introduction to Reproduction in Organisms
• NCERT Notes: Reproduction in Organisms
• Asexual Reproduction
• Sexual Reproduction
• Important Notes for NEET: Reproduction in Organisms

Sexual Reproduction in Flowering Plants

• PPT: Sexual Reproduction in Flowering Plants
• Angiosperms & Pre-Fertilisation: Structure & Events
• Structure & Types of Megasporangium (Ovule)
• Microsporogenesis
• Detailed Notes for NEET: Sexual Reproduction in Flowering Plants
• Megasporogenesis & Megagametogenesis
• Pollen Grain & Microgametogenesis
• Pollination
• Fertilisation in Flowering Plants & Double Fertilisation
• Post-Fertilisation: Embryo Development
• Post-Fertilisation: Development of Seed & Fruit
• Apomixis & Parthenocarpy
• Asexual Reproduction in Plants
• Summary: Sexual Reproduction in Flowering Plants
• Assertion & Reason Type Questions: Sexual Reproduction in Flowering Plants
• Index: Sexual Reproduction in Flowering Plants
• NCERT Notes: Sexual Reproduction in Flowering Plants

Human Reproduction

• Gametogenesis: Spermatogenesis and Oogenesis
• PPT: Human Reproduction
• Introduction to Human Reproduction
• The Male Reproductive System
• The Female Reproductive System
• Menstrual Cycle: Introduction, Duration & Phases
• Estrus Cycle
• Fertilization
• Implantation & Placenta
• Phases of Cleavage
• Pregnancy & Embryonic Development
• Parturition & Lactation
• Revision Notes: Human Reproduction
• Human Reproduction: Assertions & Reason Type Questions- 1
• Human Reproduction: Assertions & Reason Type Questions- 2
• Important Notes for NEET: Human Reproduction

Reproductive Health

• Reproductive Health: Problems & Strategies
• Birth Control, Contraception & Medical Termination of Pregnancy
• Important Notes for NEET: Reproductive Health
• Family Planning
• Sexually Transmitted Diseases (STDs) & Infertility
• Index: Reproductive Health
• NCERT Notes: Reproductive Health
• PPT: Reproductive Health

Principles of Inheritance & Variation

• Introduction: Principles of Inheritance & Variation
• Chromosomal Disorders
• Inheritance of One Gene
• PPT: Principles of Inheritance & Variation
• Mendel's Laws of Inheritance
• Inheritance of Two Genes
• Index: Principles of Inheritance & Variation
• Polygenic Inheritance & Pleiotropy
• Sex Determination
• Genetic Disorders: Pedigree Analysis & Mendelian Disorders
• Mutation and Its Types

Molecular Basis of Inheritance

• DNA: Structure of Polynucleotide Chain
• Structure & Packaging of DNA Helix
• Search for Genetic Material
• RNA World & DNA Replication
• Genetic Material Criteria & RNA World
• Genetic Code
• Translation
• Human Genome Project
• DNA Fingerprinting
• Transcription: Molecular Basis of Inheritance
• Regulation of Gene Expression
• Index: Molecular Basis of Inheritance
• Enzymes: DNA
• Important Notes for NEET: Molecular Basis of Inheritance

Evolution

• Evolution of Life: Mechanism & The Big Bang Theory
• Modern Synthetic Theory of Organic Evolution
• Evidence of Evolution & Adaptive Radiation
• Biological Evolution: Miller Urey & Louis Pasteur Experiment
• Biological Evolution: Darwinian Theory & Natural Selection
• Speciation & Its Types
• Origin & Evolution of Man
• Hardy Weinberg Principle
• Genetic Drift

Human Health & Diseases

• Human Health, Diseases & Immunity
• Common Diseases in Humans - 1
• Immunity & Human Immune System
• Vaccination & Immunisation
• Drugs & Alcohol Abuse
• AIDS & Cancer
• Common Diseases in Humans - 2

Strategies for Enhancement in Food Production

• Introduction to Animal Husbandry
• Animal Breeding
• Plant Breeding
• Fisheries
• Plant Tissue Culture
• Inbreeding & Cross Breeding
• Insecticides & Pesticides
• Hybridization
• Biofertilizers & Development of New Varieties
• Poultry Farm Management
• Sericulture & Apiculture
• Vegetables, Sugar, Spices & Rubber
• Sheep, Pigs, Horses & Mules
• Animal Diseases & Their Control
• Cybrid
• Medical Plants
• Biofertilizers

Microbes in Human Welfare

• Microbes in Household Products
• Microbes in Industrial Products
• Revision Notes: Microbes in Human Welfare
• Microbes in Sewage Treatment & in Production of Biogas
• Microbes as Biocontrol Agents & as Biofertilizers

Biotechnology: Principle & Processes

• Gene Transfer
• Principles of Biotechnology: Genetic Engineering
• Tools of Recombinant DNA Technology: Restriction Enzymes
• Tools of Recombinant DNA Technology: Cloning Vectors
• DNA Finger Printing, DNA Test & Cloning
• Processes of Recombinant DNA Technology
• Competent Host

Biotechnology & its Applications

• Biotechnological Applications in Agriculture
• Biotechnology in Medicine
• Transgenic Animals & Plants
• Ethical Issues
• Single Cell Protein & Bioenergy
• Yeast, Enzymes & Yogurt
• Cloning

Organisms and Population

• Ecology: Organisms & their Environment
• Population Interactions
• Abiotic Factors & Responses to Abiotic Factors
• Homeostasis
• Ecology: Community & Biome
• Population Growth
• Population Attributes
• Population Interactions
• Adaptation & Habitats

Ecosystem

• Ecosystem: Introduction & Types
• Ecosystems & Ecological Pyramids
• Energy Flow
• Ecological Succession
• Biogeochemical Cycles
• Ecosystem Services
• Components: Producers & Consumers

Biodiversity and its Conservation

• Biodiversity: Types, Importance, Biodiversity in India
• Patterns of Biodiversity, Importance & Loss of Biodiversity
• Biodiversity Conservation
• Natural Resources

Environmental Issues

• Introduction: Pollution & Pollutants
• Noise Pollution
• Air Pollution: Causes & Effects
• Water Pollution & Soil Pollution
• Solid Wastes
• Radioactive Wastes & Environmental Laws
• Forest Conservation & Deforestation
• Natural Resource & their Conservation

Also read:

• NEET Chemistry Notes 2023 - Download PDFs
• NEET Physics Notes 2023 - Download PDFs

Important Topics of Zoology Section

Zoology is a branch of Biology that looks at how animals interact with their environment. It is an exciting field of study that covers the anatomy, evolution, embryology, behavior, classification, and distribution of both living and extinct animals. Students should prioritize studying Reproduction and Human Physiology when preparing for exams. This EduRev article contains a list of topics that are important to consider when studying for the exam.

Important Topics of Botany Section

The science of Phytology, commonly known as Botany, involves the comprehensive study of plants, fungi and algae. Present-day Botany centers on plant structure, transformation, development, biochemistry, propagation, primary metabolism, illnesses, and plant classification. Students should prioritize topics such as Genetics, Biotechnology, and Ecology when studying for the exam, as these have higher importance. In the NEET exam, there are typically 45 questions from Botany.

NEET Biology – Weightage of various topics is as follows:

The following table provides a list of recommended books for NEET Biology, in addition to the NCERT textbook, which can be very useful for exam preparation.

Frequently Asked Questions on NEET Biology 2023

Which book is best for NEET biology?

NCERT is essential to ace NEET and must be studied thoroughly. Most of the exam questions are based on NCERT syllabus, and for the rest, Objective NCERT at your fingertips by MTG, NCERT Exemplar, Trueman's biology, Arihant and Cengage are sufficient sources. Don't forget to look into the summary section at the end of each chapter, which may contain important information that might be missed otherwise.

Is NCERT enough for NEET biology 2023?

While NCERT should certainly be the first source of study for NEET, especially Biology, it is not enough to score a good rank. Usually, 80-90% of the questions are taken from NCERT syllabus, however, for the remaining 10-20%, one must refer to other sources as well. NCERT can only help you qualify the entrance test, but with NEET now the single level medical entrance exam, the competition is much higher and one must look beyond NCERT to secure a good rank.

How many chapters in biology for NEET?

38 chapters. NEET Biology syllabus has 10 units, which in turn have 38 chapters in total. 22 chapters are in class 11 NCERT syllabus and the remaining 16 chapters are covered in NCERT Class 12 syllabus.

How many questions in NEET biology are from NCERT?

NEET Biology 2023 will include 100 questions in total, 90 of which are to be answered. The number of questions from NCERT for NEET Biology changes annually, but usually most of the questions are derived from NCERT. For example, NEET 2019 had around 84 questions that were either directly or indirectly taken from NCERT, with 78 of them being solely based on NCERT. Similarly, NEET 2018 had 82 NCERT-based questions and NEET 2017 had 76. The pattern changes each year.