NCERT Class 11 Biology Notes - Download Chapter Wise PDF Notes
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  • NCERT Class 11 Biology Notes - Download Chapter Wise PDF Notes

NCERT Class 11 Biology Notes - Download Chapter Wise PDF Notes

Irshad AnwarUpdated on 01 Sep 2025, 12:23 PM IST

The NCERT Class 11 Biology Notes are helpful for students preparing for board exams and entrance tests like NEET. These notes give a short and clear summary of each chapter. The notes are prepared by subject experts in simple language. All important diagrams and flow charts from the textbook are added. When students have less time to study, these notes are very useful. They can easily revise important topics with the help of the NCERT notes and score well in the exams.

This Story also Contains

  1. Subject-wise Weightage for Class 11 Biology
  2. Chapter-wise Class 11 Biology Notes
  3. Chapter-wise Breakdown of Class 11 Biology Notes
  4. Benefits of NCERT Class 11 Biology Notes
  5. Features of the NCERT Class 11 Biology Notes
NCERT Class 11 Biology Notes - Download Chapter Wise PDF Notes
NCERT Class 11 Biology Notes

Class 11 Biology Notes cover all the important chapters, including diversity in living things, the structure of plants and animals, cells, and processes of the human body. Difficult topics like photosynthesis, respiration, biomolecules, and body systems are explained in simple terms. The NCERT notes for Class 11 are a valuable resource because they cover all topics simply and clearly. Students can also download the 11 Class Biology Notes PDF for offline study anywhere.

Subject-wise Weightage for Class 11 Biology

For Class 11 students who are preparing for competitive exams, a strong foundation in Biology is very important to achieve success. This subject has the highest weightage in the NEET exam. Knowing the subject-wise weightage allows students to plan their preparation and revise effectively. When students are aware of the marks distribution, it becomes easy to focus on the most important topics first. This method not only helps in school exams but also builds a strong base for future entrance exams.

Assessment Structure:

  • Total Marks: 100

  • Theory: 70 marks

  • Practical Examination: 30 marks

Passing Criteria:

  • Students need to score at least 33% overall (theory + practicals)

  • Minimum 23 out of 70 in the theory paper

  • Minimum 10 out of 30 in the practicals

Also read, Subject-Wise NCERT Notes

Chapter-wise Class 11 Biology Notes

The notes include 19 chapters, with easy and well-understandable language. They provide a clear explanation of all important topics. The 11th class forms the base for all advanced topics that will appear in Class 12. Thus, it becomes important for Class 11 students to understand each topic and concept clearly. To make the study pattern easy, students should focus on the Class 11 Biology Notes and NCERT Solutions.

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

Links of Chapter-wise Biology Notes For Class 11

The following are the links to download the PDF for all Chapters. These notes will help you understand the topics better and revise quickly before exams.

Chapter-wise Breakdown of Class 11 Biology Notes

The Biology of Class 11 is divided into 19 different chapters. Each chapter has important concepts that build the understanding of life sciences. 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

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

Chapter 5: Morphology of Flowering Plants

Topics Covered:

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

An embryonic plant enclosed in a covering

Chapter 6: Anatomy of Flowering Plants

Topics Covered:

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 frog

Chapter 8: Cell: The Unit of Life

Topics Covered:

Component

Function

Cell Membrane

Regulates movement in and out of the cell

Cell Wall

Provides structural support

Endomembrane

Includes ER, Golgi apparatus, and lysosomes

Chapter 9: Biomolecules

Topics Covered:

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:

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: Photosynthesis in Higher Plants

Topics Covered:

  • Discovery, site, and 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 12: Respiration in Plants

Topics Covered:

Process

Description

Glycolysis

Breakdown of glucose to pyruvate

Fermentation

Anaerobic breakdown of pyruvate

TCA Cycle

Aerobic breakdown of acetyl-CoA

Chapter 13: 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 14: Breathing and Exchange of Gases

Topics Covered:

Process

Description

Inhalation

Air enters the lungs

Exhalation

Air leaves the lungs

Diffusion

Gas exchange between alveoli and blood

Chapter 15: Body Fluids and Circulation

Topics Covered:

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

Component

Function

Blood

Transport of gases, nutrients, and waste

Lymph

Returns tissue fluid to blood

Heart

Pumps blood throughout the body

Chapter 16: Excretory Products and Their Elimination

Topics Covered:

Organ

Function

Kidneys

Filter blood, form urine

Ureters

Transport urine to the bladder

Bladder

Stores urine

Chapter 17: Locomotion and Movement

Topics Covered:

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

System

Function

Muscular tissues

Provides movement and support

Skeletal

Provides framework and support

Chapter 18: Neural Control and Coordination

Topics Covered:

Component

Function

Neurons

Conduct impulses

Synapse

Junction between neurons

Brain

Controls body functions

Chapter 19: Chemical Coordination and Integration

Topics Covered:

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

Benefits of NCERT Class 11 Biology Notes

Students can grasp the complex topics easily and make their studies well-organized by using these notes. These notes save time and make learning more effective. Some of the important benefits are given below:

  • 11 Class Biology Notes PDF helps in easy revision before exams.

  • It covers all important topics from the NCERT textbook.

  • These notes are designed by subject experts and are useful for both school and competitive exams like NEET.

  • The NCERT Class 11 Biology Notes help a lot in doing self-study.

  • Students can also understand the difficult topics easily.

Subject-Wise NCERT Solutions

Features of the NCERT Class 11 Biology Notes

The notes are very important for revision as well as for exams. They come with several features, some of which are listed below:

  • Students can use the notes for last-minute revision.

  • Real-life examples are added, which makes learning biology easier.

  • Students can access the 11 Class Biology Notes PDF totally free.

  • The notes are based on the latest syllabus.

  • The NCERT Class 11 Biology Notes include diagrams to improve visual learning.

Frequently Asked Questions (FAQs)

Q: How many chapters are there in Class 11 Biology NCERT?
A:

The Class 11 Biology Notes include a total of 19 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,

  • Photosynthesis in Higher Plants, 

  • Respiration in Plants, 

  • Plant Growth and Development,  

  • 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.

Q: How to download the chapter wise Class 11 Biology Notes?
A:

Students can download and access the chapter-wise Class 11 Biology notes through Careers360 website which is,
https://school.careers360.com/ncert/ncert-class-11th-biology-notes

Q: How to download class 11 NCERT biology book?
A:

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

Q: 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 notes will definitely help.

Q: Are all the chapters of Class 11 Biology covered in this NCERT Notes for Class 11 Biology?
A:

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

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