NCERT Biology Class 11 builds the foundational biology that Class 12’s genetics and human-physiology chapters assume you already know — get the complete NCERT books class 11 biology (PDF) below, chapter by chapter.
What’s in the Class 11 Biology NCERT Book (2026-27 Edition)
The Living World, Biological Classification, Plant Kingdom and Animal Kingdom cover classification; Cell: The Unit of Life and Biomolecules cover cell biology; the book closes with plant and animal physiology — Photosynthesis in Higher Plants, Body Fluids and Circulation, Neural Control and Coordination and Chemical Coordination and Integration.
Study Tip
Cell: The Unit of Life and Biomolecules are the two chapters every later biology chapter — in both Class 11 and 12 — depends on; do not move on until both are solid.
Use the download button above to access this book on the official NCERT source.
Chapters in This Book
Chapter links on this page were last automatically re-checked against the official NCERT source on August 13, 2026.
All 20 chapters below link directly to the official NCERT source (ncert.nic.in) — nothing is hosted on this site. Click “Read” to open a chapter, or “Download” to save it. You can also open the full book in our chapter-by-chapter reader.
How do I download the Class 11 Biology NCERT book PDF?
Click any chapter link in the table above to open that chapter’s PDF directly from the official NCERT server, or use the ZIP link to download the complete book at once.
Is this PDF download free?
Yes, all links point to NCERT’s own official portal (ncert.nic.in), and downloading these PDFs is completely free.
Is this the 2026-27 edition?
Yes, this page reflects the 2026-27 edition of the Class 11 Biology NCERT textbook as published on the official NCERT portal.
How many chapters does the Class 11 Biology NCERT book have?
The book has 20 sections listed here, including front matter and the full set of chapters covering plant and animal biology.
Is this book available in a Hindi-medium edition?
Yes, NCERT publishes a Hindi-medium edition of this book on its official textbooks portal alongside the English edition.
Can I read this book offline after downloading?
Yes, once downloaded, the PDF files can be saved to your device and read offline anytime.
Is NCERT Biology enough for NEET preparation?
NCERT is widely regarded as the single most important source for NEET Biology, since a large share of questions are based directly on its text, though most serious aspirants also solve additional MCQ practice sets.
Why does the chapter order in the PDF not match the printed page numbers exactly?
NCERT occasionally reorganizes or renumbers chapters across editions; the links above are grouped by their official file names as published by NCERT, so the download order may not exactly match a printed copy’s page sequence.
How does this book connect to Class 12 Biology?
Class 11 topics like Cell: The Unit of Life and Biomolecules form the conceptual base for Class 12 chapters on genetics, molecular biology, and biotechnology.
Should I read the NCERT Exemplar for Biology too?
Yes, especially for NEET preparation — the Exemplar offers additional conceptual questions that go slightly beyond the main textbook’s exercises.
Are diagrams from the NCERT textbook important for exams?
Yes, diagram-based questions are common in both board exams and NEET, so it’s worth studying the labelled diagrams in each chapter closely, not just the text.
Are the front matter/prelims pages worth downloading?
Yes, they include the table of contents, useful for getting an overview of the syllabus before you start studying.