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

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.

This Story also Contains
  1. NCERT Book for Class 11 Biology (Unit-wise)
  2. Benefits of the NCERT Book for CBSE Class 11 Biology
  3. How to prepare using the NCERT Book for Class 11 Biology book PDF?
NCERT Book for class 11 Biology 2025-26: Download Free 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 NameEnglish MediumHindi medium
1Diversity of Living Organismsजीव जगत
जीव जगत का वर्गीकरण
वनस्पति जगत
प्राणि जगत
2Structural Organisation in Plants and Animalsपुष्पी पादपों का आकारिकी
पुष्पी पादपों का शारीर
प्राणियों में संरचनात्मक संगठन
3Cell: Structure and Functionकोशिका : जीवन की इकाई
जैव अणु
कोशिका चक्र और कोशिका विभाजन
4Plant Physiologyउच्च पादपों में प्रकाश-संश्लेषण
पादप वृद्धि एवं परिवर्धन
पादप में श्वसन
5Human Physiologyश्वसन 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:


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.

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Upcoming School Exams

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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 3.8×107 J 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

Option 1)

less than 3

Option 2)

more than 3 but less than 6

Option 3)

more than 6 but less than 9

Option 4)

more than 9

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