- Benefits of NCERT Books for Class 12 Biology
- Class 12 Biology Units and NEET Syllabus
- NCERT Books Class 12 Biology – Free PDF Download for 2026-27
- NCERT Books for Class 12 Biology – Chapter List (Free PDF Download, Updated for 2026–27)
- CBSE Class 12 Biology 2026–27: Unit-wise Marks
- What You Will Study in Class 12 Biology
- How to Use NCERT Class 12 Biology for CBSE and NEET
- Why Choose Infinity Learn for NCERT Class 12 Biology Resources
- Frequently Asked Questions (FAQs)
NCERT Books for Class 12 Biology – Free PDF Download (Updated for 2026-27)
By Karan singh ildefaultfield
|
Updated on 12 Oct 2026, 12:18 IST
In NEET UG 2026, Biology accounted for 90 questions and 360 marks, making it the largest section of the examination. Several areas covered in Class 12 Biology, including reproduction, genetics and evolution, biotechnology, and ecology, form an essential part of the NEET Biology syllabus as well as the CBSE Class 12 science curriculum.
NCERT Biology textbooks are prescribed for CBSE Class 12 and are widely used by NEET aspirants alongside the official NEET syllabus. This page provides access to the current NCERT Class 12 Biology textbook, including the 2026-27 reprint, with chapter-wise PDF links and study resources.
Benefits of NCERT Books for Class 12 Biology
- CBSE Alignment: The NCERT Biology textbook follows the prescribed Class 12 Biology curriculum and provides the core content students study for CBSE examinations.
- NEET Foundation: Covers several Class 12 Biology areas included in the official NEET syllabus and provides a useful base for concept revision and factual recall.
- Visual Learning: Uses labeled diagrams and illustrations to explain structures, processes, and relationships that students can revise alongside the text.
- Accessibility: Available as free digital downloads in both English and Hindi mediums.
- Structured Coverage: Covers reproduction, genetics and evolution, biology and human welfare, biotechnology, and ecology across five units.
- Focused Revision: Provides a single, prescribed textbook that students can use as a core reference for CBSE Biology and as part of their NEET preparation.
Class 12 Biology Units and NEET Syllabus
| Class 12 NCERT Unit | NEET Syllabus Area |
| Reproduction | Reproduction |
| Genetics and Evolution | Genetics and Evolution |
| Biology and Human Welfare | Biology and Human Welfare |
| Biotechnology | Biotechnology and its Applications |
| Ecology | Ecology and Environment |
Note: These Class 12 Biology units overlap with corresponding areas in the NEET Biology syllabus. NEET preparation requires coverage of the complete prescribed syllabus, including Class 11 content.
NCERT Books Class 12 Biology – Free PDF Download for 2026-27
NCERT Books for Class 12 Biology – Chapter List (Free PDF Download, Updated for 2026–27)
Writer's Note: Insert the official chapter-wise NCERT Book PDF download links in the table below.
NCERT Class 12 Biology – Chapter List
| Chapter No. | UNIT | Chapter Name | Download PDF |
| 1 | UNIT VI: Reproduction | Sexual Reproduction in Flowering Plants | Download PDF |
| 2 | UNIT VI: Reproduction | Human Reproduction | Download PDF |
| 3 | UNIT VI: Reproduction | Reproductive Health | Download PDF |
| 4 | UNIT VII: Genetics and Evolution | Principles of Inheritance and Variation | Download PDF |
| 5 | UNIT VII: Genetics and Evolution | Molecular Basis of Inheritance | Download PDF |
| 6 | UNIT VII: Genetics and Evolution | Evolution | Download PDF |
| 7 | UNIT VIII: Biology and Human Welfare | Human Health and Disease | Download PDF |
| 8 | UNIT VIII: Biology and Human Welfare | Microbes in Human Welfare | Download PDF |
| 9 | UNIT IX: Biotechnology | Biotechnology: Principles and Processes | Download PDF |
| 10 | UNIT IX: Biotechnology | Biotechnology and its Applications | Download PDF |
| 11 | UNIT X: Ecology | Organisms and Populations | Download PDF |
| 12 | UNIT X: Ecology | Ecosystem | Download PDF |
| 13 | UNIT X: Ecology | Biodiversity and Conservation | Download PDF |
CBSE Class 12 Biology 2026–27: Unit-wise Marks
| Unit | Unit Name | Theory Marks |
| VI | Reproduction | 16 |
| VII | Genetics and Evolution | 20 |
| VIII | Biology and Human Welfare | 12 |
| IX | Biotechnology and its Applications | 12 |
| X | Ecology and Environment | 10 |
| Total | — | 70 |
What You Will Study in Class 12 Biology
The current NCERT Class 12 Biology textbook contains 13 chapters organized across five units:
- Reproduction: Plant and human reproductive processes, reproductive health, contraception, sexually transmitted infections, and infertility.
- Genetics and Evolution: Mendelian inheritance, molecular genetics, DNA replication and gene expression, genetic variation, and key concepts of evolution.
- Biology and Human Welfare: Human health and disease, immunity, common infections, AIDS, cancer, drug and alcohol abuse, and the role of microbes in food processing, sewage treatment, industry, and agriculture.
- Biotechnology: Recombinant DNA technology, genetic engineering, cloning vectors, PCR, and applications of biotechnology in health and agriculture.
- Ecology: Population interactions, energy flow through ecosystems, nutrient cycling, and biodiversity preservation strategies.
How to Use NCERT Class 12 Biology for CBSE and NEET
| Goal | How to Use NCERT Biology |
| CBSE Board Exams | Read each prescribed chapter carefully, revise diagrams and terminology, and practice textbook-based and competency-focused questions. |
| NEET UG | Cover the complete Class 11 and Class 12 Biology syllabus, read NCERT carefully, revise diagrams and factual details, and practice MCQs and previous-year questions. |
| Quick Revision | Use chapter summaries, diagrams, tables, and key terms to revisit important information. |
Why Choose Infinity Learn for NCERT Class 12 Biology Resources
- Free Study Materials: Access free chapter-wise NCERT PDFs and structured solutions.
- Curated Content: Material aligns with the current CBSE Biology curriculum and the prescribed NEET syllabus.
- Targeted Practice: Chapter-wise practice tests and multiple-choice questions modeled on recent exam trends.
- Structured Support: Continuous progress tracking and study tools to address weak areas.
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Frequently Asked Questions (FAQs)
How many chapters are there in NCERT Class 12 Biology?
The current NCERT Class 12 Biology textbook contains 13 chapters organized across five units: Reproduction, Genetics and Evolution, Biology and Human Welfare, Biotechnology, and Ecology.
Is NCERT Class 12 Biology enough for NEET preparation?
NCERT Class 12 Biology is an essential part of NEET preparation, but it is not the complete NEET Biology syllabus because NEET includes both Class 11 and Class 12 Biology. Use NCERT to build and revise core concepts, definitions, diagrams, and factual details, and supplement it with MCQs, previous-year questions, and mock tests.
Where can I download the NCERT Class 12 Biology PDF for free?
You can download chapter-wise PDFs directly from the Infinity Learn portal using the download links provided in the chapter table above.
Is the NCERT Class 12 Biology book updated for 2026-27?
The current NCERT Class 12 Biology textbook is available through the NCERT textbook portal, and the 2026–27 reprint is available for the current academic session. The textbook continues to contain 13 chapters across five units. Students should refer to the CBSE 2026–27 Biology syllabus separately for the topics prescribed for board assessment.
Which chapters carry the highest weightage in NEET?
NEET does not publish an official chapter-wise weightage for Class 12 Biology. The exam syllabus includes Reproduction, Genetics and Evolution, Biology and Human Welfare, Biotechnology and its Applications, and Ecology and Environment. Because question distributions vary across years, students should prepare all prescribed areas.
How many times should I read NCERT Biology for NEET?
There is no fixed number of times you need to read NCERT Biology. Start with a careful first reading, then revisit the chapters during revision and use active recall, MCQs, and previous-year questions to test your retention. Pay particular attention to diagrams, tables, definitions, and examples.
