NCERT Class 11 Biology Notes - Download Chapter Wise PDF Notes
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
- Subject-wise Weightage for Class 11 Biology
- Chapter-wise Class 11 Biology Notes
- Chapter-wise Breakdown of Class 11 Biology Notes
- Benefits of NCERT Class 11 Biology Notes
- Features of the 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 |
|---|---|
Prokaryotic organisms | |
Eukaryotic, unicellular or colonial | |
Heterotrophic, decomposers | |
Autotrophic, photosynthetic | |
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 |
|---|---|
Sponges, simple multicellular structures | |
Jellyfish, corals, radial symmetry | |
Ctenophora | Comb jellies, bilateral symmetry |
Flatworms, acoelomate | |
Roundworms, pseudocoelomate | |
Annelida | Segmented worms, setae |
Arthropoda | Jointed appendages, exoskeleton |
Mollusca | Soft-bodied, shell present |
Radial symmetry, water vascular system | |
Chordata | Notochord, dorsal hollow nerve cord |
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 | An 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 and vascular cambium in plants
Tissue | Function |
|---|---|
Growth and development | |
Epidermal | Protective layer |
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:
- 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, and 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: 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 |
CO2 fixation into glucose |
Chapter 12: 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 13: Plant Growth and Development
Topics Covered:
- Growth, differentiation, and plant growth regulators
- Photoperiodism, vernalization
Regulator | Function |
|---|---|
Promote cell elongation | |
Promote seed germination, stem elongation | |
Cytokinins | Promote cell division |
Chapter 14: 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 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:
- 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 |
Chapter 17: Locomotion and Movement
Topics Covered:
- Structure and function of the human muscular and skeletal system
- Types of movement, joints
System | Function |
|---|---|
Provides movement and support | |
Skeletal | Provides framework and support |
Chapter 18: 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 |
Chapter 19: Chemical Coordination and Integration
Topics Covered:
- Structure and function of the human endocrine system
- Hormones, endocrine glands
Gland | Hormone(s) | Function |
|---|---|---|
Releasing hormones | Regulates the pituitary gland | |
Growth hormone, ACTH, TSH, FSH, LH | Controls other endocrine glands | |
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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