NCERT Book for class 11 Biology 2025-26: Download Free PDF

Edited By Irshad Anwar | Updated on May 20, 2025 07:49 AM IST

The NCERT Class 11 Biology textbook is a necessary tool for students who wish to lay a solid foundation in biological sciences. The book, famous for its straightforward explanations and systematic approach, covers cell biology, plant physiology, animal physiology, genetics, and ecology, making them easy to understand for all students. It is divided into chapters and units, each followed by a detailed table of contents and followed by summaries and exercises. It is completely aligned with the most recent CBSE curriculum and highly recommended for preparation for both the board exam as well as for competitive exams like NEET, where basic clarity becomes essential.

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This Story also Contains

NCERT Book for Class 11 Biology (Unit-wise)
Benefits of the NCERT Book for CBSE Class 11 Biology
How to prepare using the NCERT Book for Class 11 Biology book PDF?

NCERT Book for class 11 Biology 2025-26: Download Free PDF

By referring to the Biology textbook, students can develop their problem-solving skills and increase their understanding of scientific principles. The NCERT book focuses on basic understanding rather than exact memorisation, incorporating good-quality diagrams, practical activities, and self-test questions to improve understanding. Downloading the PDF of Class 11 Biology NCERT provides learners straightforward access to the entire syllabus, key topics, and in-depth explanations, hence making it a handy study companion for success in exams.

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NCERT Book for Class 11 Biology (Unit-wise)

Students can go through the table below to know the Biology syllabus and weightage of each unit. So that they can start to prepare accordingly. Students can also find NCERT Biology class 11 solutions here.

NCERT 11th Biology Textbook Chapter Names and Weightage

Given below are the biology units along with the respective chapter names:

Unit no.	Unit Name	English Medium	Hindi medium
1	Diversity of Living Organisms	The Living World Biological Classification Plant Kingdom Animal Kingdom	जीव जगत जीव जगत का वर्गीकरण वनस्पति जगत प्राणि जगत
2	Structural Organisation in Plants and Animals	Morphology of Flowering Plants Anatomy of Flowering Plants Structural Organisation in Animals	पुष्पी पादपों का आकारिकी पुष्पी पादपों का शारीर प्राणियों में संरचनात्मक संगठन
3	Cell: Structure and Function	Cell The Unit of Life Biomolecules Cell Cycle and Cell Division	कोशिका : जीवन की इकाई जैव अणु कोशिका चक्र और कोशिका विभाजन
4	Plant Physiology	Photosynthesis in Higher Plants Respiration in Plants Plant Growth and Development	उच्च पादपों में प्रकाश-संश्लेषण पादप वृद्धि एवं परिवर्धन पादप में श्वसन
5	Human Physiology	Breathing and Exchange of Gases Body Fluids and Circulation Excretory Products and Their Elimination Locomotion and Movement Neural Control and Coordination Chemical Coordination and Integration	श्वसन और गैसों का विनिमय शरीर द्रव तथा परिसंचरण उत्सर्जी उत्पाद एवं उनका निष्कासन गमन एवं संचलन तंत्रिकीय नियंत्राण एवं समन्वय तंत्रिकीय नियंत्राण एवं समन्वय

Download NCERT 11th Biology Book 2025-26 PDF

Students can download the book from here: NCERT Class 11 Biology Book PDF 2025-26

Benefits of the NCERT Book for CBSE Class 11 Biology

The NCERT Class 11 Biology textbook is in accordance with the current CBSE syllabus and gives concise explanations of every topic. It deals with key concepts that are regularly asked about in exams, making it easy for students to prepare well for their board exams. The textbook is also an excellent study guide for self-study, making students organise their studies and exam approach in an effective manner. With its systematic content and simple language, the book makes learning Biology easier and more efficient.

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How to prepare using the NCERT Book for Class 11 Biology book PDF?

A student must go through the NCERT syllabus, analyse it and then prepare using the book.
Make a proper study timetable and prepare NCERT Biology Class 11 notes.
Make your basics strong and understand concepts to keep them retained in your memory.
Solve previous year's question papers to know about the types of questions asked from a topic or chapter.
Take short breaks to keep the mind fresh and avoid boredom.

Students can access other NCERT books here by clicking on the links provided below:

NCERT Books for Class 11 Hindi	NCERT Books for Class 11 Maths
NCERT Books for Class 11 English	NCERT Books for Class 11 Physics
NCERT Books for Class 11 Chemistry	-

Frequently Asked Questions (FAQs)

1. How many chapters are included in the Class 11 Biology NCERT book for 2025-26?

There are 22 chapters grouped under five thematic units in the Class 11 Biology NCERT book.

2. Where can I download the official NCERT Class 11 Biology book PDF for free?

The official NCERT website provides free PDF downloads of the Class 11 Biology book

3. Is the 2025-26 NCERT Biology book updated according to the latest syllabus?

Yes, the 2025-26 edition is completely rewritten and aligned with the revised syllabus and curriculum framework.

4. Are both English and Hindi versions of the Class 11 Biology book available in PDF?

Yes, the NCERT Biology book for Class 11 is available in both English and Hindi mediums for free download.

5. Does the NCERT Biology book include chapter summaries and exercises?

Each chapter ends with a summary and a set of questions for self-assessment and revision.

Also Read

NCERT Exemplar Class 11 Biology Solutions Chapter 1 The Living World

NCERT Exemplar Class 11 Biology Solutions Chapter 2 Biological Classification

NCERT Exemplar Class 11 Biology Solutions Chapter 18 Body Fluids and Circulation

NCERT Exemplar Class 11 Biology Solutions Chapter 17 Breathing and Exchange of Gases

NCERT Exemplar Class 11 Biology Solutions Chapter 15 Plant Growth and Development

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

NCERT Solutions for Class 11 Maths Chapter 10 Conic Sections

NCERT Solutions for Class 11 Maths Chapter 9 Straight Lines

NCERT Solutions for Class 11 Maths Chapter 1 Sets

NCERT Solutions for Class 11 Biology Chapter 19 Chemical Coordination and Integration

NCERT Solutions for Class 11 Biology Chapter 18 Neural Control and Coordination

NCERT Solutions for Class 11 Biology Chapter 13 Plant Growth and Development

NCERT Books for class 11 Maths 2025-26: Download Free PDF

NCERT Book for class 11 Biology 2025-26: Download Free PDF

NCERT Books for Class 11 Physics 2025-26: Download PDF

NCERT Books for Class 11 Chemistry 2025-26: Download Free PDF

NCERT Books for Class 11 English 2025-26: Download Free PDF

NCERT Books for class 11 Hindi 2025-26: Download Free PDF

NCERT Syllabus for Class 11 Physics 2025-26 - Download Latest Syllabus Pdf

NCERT Class 11 Biology Chapter 14 Notes Respiration In Plants - Download PDF Notes

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

NCERT Class 11 Biology Chapter 13 Notes Photosynthesis In Higher Plants - Download PDF Notes

NCERT Class 11 Biology Chapter 10 Notes Cell Cycle And Cell Division- Download PDF

NCERT Notes for Class 11 Biology Chapter 9 Biomolecules- Download PDF Notes

NCERT Class 11 Biology Chapter 8 Notes Cell The Unit Of Life- Download PDF Notes

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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