NCERT Class 11 Biology Notes- Download Chapter wise PDF Notes

NCERT Class 11 Biology Notes - Download Chapter Wise PDF Notes

Edited By Irshad Anwar | Updated on Apr 01, 2025 07:59 AM IST

NCERT Class 11 Biology Notes are required by students for the boards as well as competitive examinations like NEET. The notes help in giving a quick and short revision of the chapters so that students learn concepts easily and fast. The notes have been created by experts for short answers, diagrams, and key questions by the NCERT Class 11 Biology Book.

This Story also Contains

Chapter-wise Biology Notes for Class 11
Chapter-wise Biology Notes For Class 11
Other CBSE NCERT Study Resources
Chapter-wise Breakdown of CBSE Class 11 Biology Notes

NCERT Class 11 Biology Notes - Download Chapter Wise PDF Notes

The notes include all the important chapters, including diversity of the living world, structural organization in animals and plants, cell function and structure, plant physiology, and human physiology. They split difficult subjects like photosynthesis, respiration, biomolecules, and body systems into simple points. Biology notes for Class 11 are perfect for revision at the last minute since they effectively condense the material. The students can revise important terms such as mitosis, osmosis, enzymes, and neural control confidently without any fear using these notes.

Also read:

Chapter-wise Biology Notes for Class 11

The notes include 22 chapters, of which 3 have been removed by NCERT from the CBSE Syllabus. CBSE Class 11th is the base for advanced topics in the related subjects that will appear in Class 12. Thus, it becomes mandatory for Class 11 students to read and understand each of the topics most easily and effectively for the NCERT Notes for Class 12. The NCERT Biology Class 11 Notes provide important notes on all the chapters. To optimise the study methodology, having revision notes and NCERT Solutions handy saves you time during revision.

These notes explain all the important concepts, diagrams, and frequently asked questions. Students can easily download all the NCERT Notes for Class 11 Biology PDF for free and score good marks in their board examination.

Chapter-wise Biology Notes For Class 11

The following are the links to download the PDF for all Chapters:

Unit 1 – Diversity of Living Organisms

Unit 2 – Structural Organisation in Plants and Animals

Unit 3 – Cell Structure and Function

Unit 4 – Plant Physiology

Unit 5 – Human Physiology

Other CBSE NCERT Study Resources

Class 11 students can access the notes, solutions, and exemplars for all subjects.

Subject-Wise NCERT Notes

NCERT Notes Class 11 Maths

NCERT Notes Class 11 Physics

NCERT Notes Class 11 Chemistry

Chapter-wise Breakdown of CBSE Class 11 Biology Notes

The different chapters under the units are mentioned below:

Chapter 1: The Living World

Topics Covered:

Characteristic features of living organisms
Need for a classification system
Major taxonomic categories
Taxonomical aids

Chapter 2: Biological Classification

Topics Covered:

Five Kingdom classification system

Archaebacteria, Eubacteria
Chrysophytes, Dinoflagellates, Euglenoids, Slime moulds, Protozoans
Phycomycetes, Ascomycetes, Basidiomycetes, Deuteromycetes
Viruses, Viroids, Prions, Lichens

Kingdom	Characteristics
Monera	Prokaryotic organisms
Protista	Eukaryotic, unicellular or colonial
Fungi	Heterotrophic, decomposers
Plantae	Autotrophic, photosynthetic
Animalia	Multicellular, heterotrophic

Subject Wise NCERT Exemplar Solutions

Chapter 3: Plant Kingdom

Topics Covered:

Algae, Bryophytes, Pteridophytes, Gymnosperms, Angiosperms
Systems of classification
Life cycle of angiosperms

Division	Characteristics
Chlorophyceae	Green algae, chlorophyll a and b
Phaeophyceae	Brown algae, chlorophyll a and c
Rhodophyceae	Red algae, chlorophyll a and d
Bryophyta	Liverworts, mosses
Pteridophyta	Ferns, vascular plants
Gymnospermae	Conifers, cycads, ginkgo
Angiospermae	Flowering plants, seeds enclosed in fruits

Chapter 4: Animal Kingdom

Topics Covered:

Basis of classification of animals
Levels of organisation, symmetry, diploblastic and triploblastic organisation
Coelom, segmentation, notochord

Phylum	Characteristics
Porifera	Sponges, simple multicellular structures
Coelenterata	Jellyfish, corals, radial symmetry
Ctenophora	Comb jellies, bilateral symmetry
Platyhelminthes	Flatworms, acoelomate
Aschelminths	Roundworms, pseudocoelomate
Annelida	Segmented worms, setae
Arthropoda	Jointed appendages, exoskeleton
Mollusca	Soft-bodied, shell present
Echinodermata	Radial symmetry, water vascular system
Chordata	Notochord, dorsal hollow nerve cord

Also, students can refer,

Chapter 5: Morphology of Flowering Plants

Topics Covered:

Roots, stem, leaf, inflorescence, flower, fruit, seed
Modifications of root, stem, and leaf

Part	Function
Root	Anchorage, absorption of water and minerals
Stem	Support, transport of water and minerals
Leaf	Photosynthesis
Inflorescence	Arrangement of flowers
Flower	Reproductive structure
Fruit	Developed from the ovary, contains seeds
Seed	Embryonic plant enclosed in a covering

Chapter 6: Anatomy of Flowering Plants

Topics Covered:

Tissues, tissue system, anatomy of dicot and monocot plants
Secondary growth in plants

Tissue	Function
Meristematic	Growth and development
Epidermal	Protective layer
Ground	Support and storage
Vascular	Transport of water and nutrients

Chapter 7: Structural Organisation in Animals

Topics Covered:

Animal tissues, organs, and organ systems

Morphology and anatomy of the earthworm, cockroach, and frog

Tissue	Function
Epithelial	Forms lining and glands
Connective	Support and connective tissue
Muscle	Movement and contraction
Neural	Conducts impulses

Chapter 8: Cell: The Unit of Life

Topics Covered:

Cell theory, prokaryotic and eukaryotic cells
Cell membrane, cell wall, endomembrane system

Component	Function
Cell Membrane	Regulates movement in and out of the cell
Cell Wall	Provides structural support
Endomembrane	Includes ER, Golgi apparatus, lysosomes

Chapter 9: Biomolecules

Topics Covered:

Structure, types, and importance of biomolecules
Proteins, polysaccharides, nucleic acids

Biomolecule	Function
Proteins	Structural, enzymatic, and hormonal functions
Polysaccharides	Energy storage, structural roles
Nucleic Acids	Genetic information storage

Chapter 10: Cell Cycle and Cell Division

Topics Covered:

Cell cycle, mitosis, meiosis

Phase	Description
Prophase	Chromatin condenses, nuclear envelope breaks down
Metaphase	Chromosomes align at the metaphase plate
Anaphase	Sister chromatids separate
Telophase	Nuclear envelope reforms
Cytokinesis	Cytoplasm divides

Chapter 11: Transport in Plants

Topics Covered:

Uptake and transport of water, mineral nutrients, and food

Xylem transport, transpiration, phloem transport

Process	Description
Osmosis	Movement of water through a semipermeable membrane
Transpiration	Loss of water vapor through stomata
Phloem Transport	Movement of sugars and other substances

Chapter 12: Mineral Nutrition

Topics Covered:

Importance, uptake, and metabolism of minerals
Essential mineral elements, nitrogen cycle

Mineral	Role in Plants
Nitrogen	Component of amino acids, nucleic acids
Phosphorus	Component of nucleic acids, ATP
Potassium	Maintains osmotic balance

Chapter 13: Photosynthesis in Higher Plants

Topics Covered:

Discovery, site, mechanism of photosynthesis
Light reaction, electron transport, Calvin cycle

Process	Description
Light Reaction	Light-dependent reactions, ATP and NADPH production
Calvin Cycle	CO2 fixation into glucose

Chapter 14: Respiration in Plants

Topics Covered:

Pathway of anaerobic and aerobic respiration
Glycolysis, fermentation, tricarboxylic acid cycle

Process	Description
Glycolysis	Breakdown of glucose to pyruvate
Fermentation	Anaerobic breakdown of pyruvate
TCA Cycle	Aerobic breakdown of acetyl-CoA

Chapter 15: Plant Growth and Development

Topics Covered:

Growth, differentiation, and plant growth regulators
Photoperiodism, vernalization

Regulator	Function
Auxins	Promote cell elongation
Gibberellins	Promote seed germination, stem elongation
Cytokinins	Promote cell division

Chapter 16: Digestion and Absorption

Topics Covered:

Structure and function of the human digestive system
Digestion of food, absorption of digested products

Organ	Function
Mouth	Mechanical digestion, enzymatic breakdown
Stomach	Gastric digestion
Small Intestine	Most absorption occurs here

Chapter 17: Breathing and Exchange of Gases

Topics Covered:

Structure and function of the human respiratory system
Mechanism of breathing, exchange of gases

Process	Description
Inhalation	Air enters the lungs
Exhalation	Air leaves the lungs
Diffusion	Gas exchange between alveoli and blood

Chapter 18: Body Fluids and Circulation

Topics Covered:

Structure and function of the human circulatory system
Blood, lymph, circulatory pathways

Component	Function
Blood	Transport of gases, nutrients, waste
Lymph	Returns tissue fluid to blood
Heart	Pumps blood throughout the body

Chapter 19: Excretory Products and Their Elimination

Topics Covered:

Structure and function of the human excretory system
Urine formation, regulation of kidney function

Organ	Function
Kidneys	Filter blood, form urine
Ureters	Transport urine to the bladder
Bladder	Stores urine until micturition

Chapter 20: Locomotion and Movement

Topics Covered:

Structure and function of the human muscular and skeletal system
Types of movement, joints

System	Function
Muscular	Provides movement and support
Skeletal	Provides framework and support

Chapter 21: Neural Control and Coordination

Topics Covered:

Structure and function of the human nervous system
Neurons, reflex action

Component	Function
Neurons	Conduct impulses
Synapse	Junction between neurons
Brain	Controls body functions

Subject Wise NCERT Solutions

Chapter 22: Chemical Coordination and Integration

Topics Covered:

Structure and function of the human endocrine system
Hormones, endocrine glands

Gland	Hormone(s)	Function
Hypothalamus	Releasing hormones	Regulates the pituitary gland
Pituitary	Growth hormone, ACTH, TSH, FSH, LH	Controls other endocrine glands
Thyroid	Thyroxine (T4), Triiodothyronine (T3)	Regulates metabolism
Adrenal	Adrenaline, Cortisol	Stress response, electrolyte balance
Pancreas	Insulin, Glucagon	Regulates blood sugar levels

NCERT Books and Syllabus

NCERT Book for Class 11

NCERT Syllabus for Class 11

Frequently Asked Questions (FAQs)

1. Are all the chapters of Class 11 Biology covered in this NCERT Notes for Class 11 Biology?

NCERT Class 11 Biology chapter wise notes discuss all the chapters covered in the Class 11 NCERT book.

2. How will these Class 11 Biology Notes help in the NEET exam?

A. Class 11 NCERT concepts are also asked in the NEET exam every year, so these note will definitely help.

3. How many chapters are there in Class 11 Biology NCERT?

The NCERT Class 11 chapter wise notes include a total 22 chapters. The chapters are:
- The Living World,
- Biological Classification,
- Plant Kingdom,
- Animal Kingdom,
- Morphology of Flowering Plants,
- Anatomy of Flowering Plants,
- Structural Organisation in Animals,
- Cell: The Unit of Life,
- Biomolecules,
- Cell Cycle and Cell Division,
- Transport in Plants,
- Mineral Nutrition,
- Photosynthesis in Higher Plants,
- Respiration in Plants,
- Plant Growth and Development,
- Digestion and Absorption,
- Breathing and Exchange of Gases,
- Body Fluids and Circulation,
- Excretory Products and Their Elimination,
- Locomotion and Movement,
- Neural Control and Coordination, and
- Chemical Coordination and Integration.

4. How to download the chapter wise Class 11 Biology Notes?

Click on the link to the corresponding chapter that you wish to download. A link for each chapter is given in the article. Search on google "Careers360 NCERT Class 11 Biology Notes" and it will appear on the top.

5. How to download class 11 NCERT biology book?

Visit this link to download Class 11 Biology NCERT for free. https://ncert.nic.in/textbook.php?kebo1=0-22

Also Read

NCERT Exemplar Class 11 Chemistry solutions Chapter 11 P-Block Elements

NCERT Exemplar Class 11 Chemistry Solutions Chapter 14 Environmental Chemistry

NCERT Exemplar Class 11 Chemistry Solutions Chapter 9 Hydrogen

NCERT Exemplar Class 11 Maths Solutions Chapter 7 Permutations and Combinations

NCERT Exemplar Class 11 Maths Solutions Chapter 11 Conic Sections

NCERT Exemplar Class 11 Biology Solutions Chapter 10 Cell Cycle and Cell Division

NCERT Solutions for Class 11 Physics Chapter 8 Mechanical Properties Of Solids

NCERT Solutions for Class 11 Physics Chapter 7 Gravitation

NCERT Solutions for Class 11 Biology Chapter 8 Cell The Unit of Life

NCERT Solutions for Class 11 Biology Chapter 4 Animal Kingdom

NCERT Solutions for Class 11 Biology Chapter 12 Respiration in Plants

NCERT Solutions for Class 11 Biology Chapter 5 Morphology of Flowering Plants

NCERT Class 11 Biology Chapter 22 Notes Chemical Coordination And Integration- Download PDF Notes

NCERT Class 11 Biology Chapter 19 Notes Excretory Products And Their Elimination- Download PDF Notes

NCERT Class 11 Biology Chapter 20 Notes Locomotion And Movement- Download PDF Notes

NCERT Class 11 Biology Chapter 5 Notes Morphology Of Flowering Plants- Download PDF Notes

NCERT Class 11 Biology Chapter 15 Notes Plant Growth And Development- Download PDF Notes

NCERT Class 11 Biology Chapter 18 Notes Body Fluids And Circulation- Download PDF Notes

Articles

APRJC CET Syllabus 2025 – Check Subject-Wise Topics & Exam Pattern

Mar 27, 2025

Ophthalmology Courses After 12th - Eligibility Criteria, Duration, Institutes

Mar 27, 2025

How to Get a Scholarship in Resonance? – Eligibility, Exams & Benefits

Mar 26, 2025

KVS Lottery Result 2025-26 Class 1, Download KVS Class 1 Admission List PDF

Mar 26, 2025

BiPC Courses After 12th - Fees, Eligibility, Duration & Top Institutes

Mar 26, 2025

IB 2025 Exam Schedule: All exam zones (A, B, C)

Mar 24, 2025

IB Results 2025 – Check IB MYP & IB DP Program Scores and Updates

Mar 24, 2025

APRJC CET Application Form 2025 (Started) – Register Online for Admission

Mar 20, 2025

Upcoming School Exams

Central Board of Secondary Education Class 12th Examination

Admit Card Date:03 February,2025 - 04 April,2025

Exam Pattern

Admit Card

Result

Telangana State Secondary School Certificate Examination

Admit Card Date:07 March,2025 - 04 April,2025

Exam Pattern

Mock Test

Admit Card

Karnataka Secondary School Leaving Certificate Examination

Admit Card Date:10 March,2025 - 05 April,2025

Admit Card

Exam Pattern

Result

Chattisgarh State Open School 12th Examination

Admit Card Date:25 March,2025 - 21 April,2025

Admit Card

Result

Chattisgarh State Open School 10th Examination

Admit Card Date:25 March,2025 - 17 April,2025

Admit Card

Result

View All School Exams

Popular Questions

A block of mass 0.50 kg is moving with a speed of 2.00 ms^-1 on a smooth surface. It strikes another mass of 1.00 kg and then they move together as a single body. The energy loss during the collision is

Option 1) $0.34\; J$	Option 2) $0.16\; J$
Option 3) $1.00\; J$	Option 4) $0.67\; J$

A person trying to lose weight by burning fat lifts a mass of 10 kg upto a height of 1 m 1000 times. Assume that the potential energy lost each time he lowers the mass is dissipated. How much fat will he use up considering the work done only when the weight is lifted up ? Fat supplies 3.8×10⁷J of energy per kg which is converted to mechanical energy with a 20% efficiency rate. Take g = 9.8 ms⁻² :

Option 1)

2.45×10⁻³ kg

Option 2)

6.45×10⁻³ kg

Option 3)

9.89×10⁻³ kg

Option 4)

12.89×10⁻³ kg

An athlete in the olympic games covers a distance of 100 m in 10 s. His kinetic energy can be estimated to be in the range

Option 1) $2,000 \; J - 5,000\; J$	Option 2) $200 \, \, J - 500 \, \, J$
Option 3) $2\times 10^{5}J-3\times 10^{5}J$	Option 4) $20,000 \, \, J - 50,000 \, \, J$

A particle is projected at 60⁰ to the horizontal with a kinetic energy $K$ . The kinetic energy at the highest point

Option 1) $K/2\,$	Option 2) $\; K\;$
Option 3) $zero\;$	Option 4) $K/4$

In the reaction,

$2Al_{(s)}+6HCL_{(aq)}\rightarrow 2Al^{3+}\, _{(aq)}+6Cl^{-}\, _{(aq)}+3H_{2(g)}$

Option 1) $11.2\, L\, H_{2(g)}$ at STP is produced for every mole $HCL_{(aq)}$ consumed	Option 2) $6L\, HCl_{(aq)}$ is consumed for ever $3L\, H_{2(g)}$ produced
Option 3) $33.6 L\, H_{2(g)}$ is produced regardless of temperature and pressure for every mole Al that reacts	Option 4) $67.2\, L\, H_{2(g)}$ at STP is produced for every mole Al that reacts .

How many moles of magnesium phosphate, $Mg_{3}(PO_{4})_{2}$ will contain 0.25 mole of oxygen atoms?

Option 1) 0.02	Option 2) 3.125 × 10^-2
Option 3) 1.25 × 10^-2	Option 4) 2.5 × 10^-2

If we consider that 1/6, in place of 1/12, mass of carbon atom is taken to be the relative atomic mass unit, the mass of one mole of a substance will

Option 1) decrease twice	Option 2) increase two fold
Option 3) remain unchanged	Option 4) be a function of the molecular mass of the substance.

With increase of temperature, which of these changes?

Option 1) Molality	Option 2) Weight fraction of solute
Option 3) Fraction of solute present in water	Option 4) Mole fraction.

Number of atoms in 558.5 gram Fe (at. wt.of Fe = 55.85 g mol^-1) is

Option 1) twice that in 60 g carbon	Option 2) 6.023 × 10²²
Option 3) half that in 8 g He	Option 4) 558.5 × 6.023 × 10²³

A pulley of radius 2 m is rotated about its axis by a force F = (20t - 5t²) newton (where t is measured in seconds) applied tangentially. If the moment of inertia of the pulley about its axis of rotation is 10 kg m² , the number of rotations made by the pulley before its direction of motion if reversed, is