NCERT Class 12 Biology Notes - Download Chapter wise PDF Notes

NCERT Notes
NCERT Class 12 Biology Notes - Download Chapter wise PDF Notes

NCERT Class 12 Biology Notes - Download Chapter wise PDF Notes

Irshad AnwarUpdated on 03 Oct 2025, 11:58 AM IST

The NCERT Class 12 Biology notes are very helpful for students preparing for board exams and NEET. These notes provide quick summaries of all chapters, making it easier to understand concepts. All well-labeled diagrams, flow charts, and topics are included to improve visual learning. The notes are prepared by subject experts to help students revise faster and save time. With the help of these NCERT Notes, students can focus on important topics and boost their confidence before and during the exams.

This Story also Contains

NCERT Class 12 Biology Notes: Chapter-wise Links
Class 12 Biology Notes: Chapter-wise Details
Benefits of Using NCERT Class 12 Biology Notes
How NCERT Class 12 Biology Notes Help in Exam Preparation?

NCERT Class 12 Biology Notes - Download Chapter wise PDF Notes

Class 12 Biology Notes cover important chapters like reproduction, genetics, evolution, human welfare, biotechnology, and ecology. Students can easily revise important concepts like male and female reproductive systems, Mendel’s laws, DNA structure, genetic engineering, immunity, biodiversity loss, and conservation. The NCERT Notes for Class 12 are short, clear, and easy to remember, making them a perfect resource for last-minute revision. Students can also download the PDF for all the chapters and use them anytime, even offline.

NCERT Class 12 Biology Notes: Chapter-wise Links

The notes for each chapter make the concepts easy to understand and remember. Each topic is explained in simple language with key points highlighted. The NCERT Class 12 Biology Notes PDF helps students revise faster and focus on what's important. Given below is a table by which students can easily access the notes for the chapters included in class 12.

NCERT Class 12 Biology Chapter 1 Sexual Reproduction in Flowering Plants Notes

NCERT Class 12 Biology Chapter 2 Human Reproduction Notes

NCERT Class 12 Biology Chapter 3 Reproductive Health Notes

NCERT Class 12 Biology Chapter 4 Principles of Inheritance and Variation Notes

NCERT Class 12 Biology Chapter 5 Molecular Basis of Inheritance Notes

NCERT Class 12 Biology Chapter 6 Evolution Notes

NCERT Class 12 Biology Chapter 7 Human Health and Disease Notes

NCERT Class 12 Biology Chapter 8 Microbes in Human Welfare Notes

NCERT Class 12 Biology Chapter 9 Biotechnology: Principles and Processes Notes

NCERT Class 12 Biology Chapter 10 Biotechnology and its Applications Notes

NCERT Class 12 Biology Chapter 11 Organisms and Populations Notes

NCERT Class 12 Biology Chapter 12 Ecosystem Notes

NCERT Class 12 Biology Chapter 13 Biodiversity and Conservation Notes

Class 12 Biology Notes: Chapter-wise Details

The notes help students focus on what’s important for exam preparation and clarity of concepts. Below are the chapter-wise details of all 13 chapters, covering the topics and concepts included in the NCERT textbook.

Unit 1: Reproduction

Unit 2: Genetics and Evolution

Principles of Inheritance and Variation

Mendelian inheritance, genetic disorders.

Molecular Basis of Inheritance

DNA replication, protein synthesis.

Evolution

Theories of evolution, human evolution.

Unit 3: Biology and Human Welfare

Human Health and Disease

Types of diseases, immunity, and prevention strategies.

Microbes in Human Welfare

Microbial applications in industry and sewage treatment, Microbes in Human Welfare.

Unit 4: Biotechnology

Biotechnology: Principles and Processes

Recombinant DNA technology, ethical concerns.

Biotechnology and Its Applications

Genetic engineering, GMOs.

Unit 5: Ecology

Organisms and Populations

Population growth regulation, ecosystem structure.

Ecosystem

Energy flow, nutrient cycling.

Biodiversity and Conservation

Biodiversity loss and causes, conservation strategies.

Benefits of Using NCERT Class 12 Biology Notes

These notes are a great support tool for exam preparation. Students can use them to stay focused and improve their performance. They offer various benefits to students, and some of them are given below:

NCERT Class 12 Biology Notes PDF help in quick revision before exams and save a lot of time.
These make difficult concepts easier with simple and real-life-based examples.
The notes help in improving confidence by giving a clear idea of the expected questions.
They match the latest syllabus, allowing students to focus only on the topics that matter most for the exam.
Class 12 Biology Notes include diagrams and important terms for better understanding.

Also Read:

How NCERT Class 12 Biology Notes Help in Exam Preparation?

Sometimes, students get stressed while studying biology for their board exams, as the syllabus is very vast. That’s where these notes come in handy. Here’s how they support better exam preparation:

Well-organized chapter summaries in the Class 12 Biology Notes help students quickly understand the overall flow of topics.
Concept linking between chapters allows students to connect topics with the real world, improving analytical thinking in long-answer questions.
Important definitions are highlighted, which makes it easier to remember the exact concept needed to score full marks.
Topic-wise breakdown in the notes makes sure that no concept is left out.
Student-friendly NCERT Class 12 Biology Notes PDF helps them to apply what they've learned while practicing with previous years’ questions.

Subject-Wise NCERT Solutions

Frequently Asked Questions (FAQs)

Q: How to download class 12 NCERT biology book?

Visit this link to download Class 12 biology NCERT for free.

https://ncert.nic.in/textbook.php?lebo1=0-16

Q: Are all the chapters of class 12 biology covered in this NCERT Class 12th Biology Notes?

NCERT Class 12 Biology Notes discuss all the 13 chapters covered in Class 12 NCERT book

Q: How many chapters are there in class 12 biology NCERT?

The NCERT Class 12 Biology Notes include a total 13 chapters. The chapters are:

Sexual reproduction in flowering plants
Human reproduction
Reproductive health
Principles of inheritance and variation
Molecular basis of inheritance
Evolution
Human health and disease
Microbes in human welfare
Biotechnology: principles and processes
Biotechnology and its applications
Organisms and populations
Ecosystem
Biodiversity and conservation

Q: How to download the chapter wise class 12 biology notes?

Students can download and access the NCERT Class 12 Biology Notes through the Careers360 website, which is
https://school.careers360.com/ncert/ncert-class-12th-biology-notes

Q: Will these class 12th Biology Notes help in the NEET exam?

Yes, class 12th NCERT concepts are also asked in the NEET exam.

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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) $0.67\; J$

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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

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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) $20,000 \, \, J - 50,000 \, \, J$

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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) $\; K\;$
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In the reaction,

$2Al_{(s)}+6HCL_{(aq)}\rightarrow 2Al^{3+}\, _{(aq)}+6Cl^{-}\, _{(aq)}+3H_{2(g)}$

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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 .

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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

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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.

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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.

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Option 1) twice that in 60 g carbon	Option 2) 6.023 × 10²²
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