CBSE Class 12 Biology syllabus is imperative for board exam preparations. Referring to the syllabus will help you understand the curriculum for the Biology subject efficiently, helping you to maintain track of all the topics and chapters to be served for board exams. The syllabus covers the marking scheme of the Biology exam that can help you decide which topics to cover first and how to progress with the learning. The syllabus also incorporates topics for practical examination, recommended books, and the physical assessment marking scheme for Class 12 Biology. 

Class 12 Biology Syllabus comprises topics like asexual reproduction – binary fission, sporulation, and fragmentation, budding, vegetative propagation, pollination, the structure of the flower, seed dispersal significance, and fruit formation. You will also study the concepts of inheritance such as codominance, blood groups, chromosomes, and genes. You will learn about DNA, RNA, genetic code, gene expression, and how life dawned and evolved. Other topics include how various populations live in particular habitats, ecosystems, and community attributes. 

You can download the CBSE Class 12 Biology syllabus from the askIITians website efficiently for your employer. Along with the Class 12 syllabus for Biology, we also implement a complete CBSE study matter. This includes chapter notes, revision notes, mindmaps, flashcards, test series, mock tests, assignments, and study planners. You can enroll in our live classes, where our experts will teach you all the basic to complex ideas in easy-to-learn language. Our study materials are completely based on the latest CBSE syllabus and exam pattern for Class 12 Biology. 

Chapter-wise CBSE Class 12 Biology Syllabus 

The Class 12 Biology syllabus for 2021-22 includes 5 units and 16 chapters. These units comprise 70 marks in total while 30 marks are allocated to rational examination and subjective assessments. 

CBSE Class 12 Biology Syllabus.

Unit 1: Reproduction 

Reproduction, modes of reproduction, sexual and asexual reproduction, pollination, vegetative propagation in plants, male and female reproductive systems, reproductive health, birth control 

14 marks

Unit 2: Genetics and Evolution 

Principles of inheritance and variation, chromosome theory of inheritance, sex determination,  inheritance of blood groups, the structure of DNA and RNA, DNA fingerprinting, Mendelian inheritance, evolution, biological evolution, Lamarck’s theory of use and disuse of organs,  central dogma, Darwin’s theory of evolution, Hardy – Weinberg’s principle, human evolution 

18 marks

Unit 3: Biology and Human Welfare 

Human health and diseases, the immune system in human beings, vaccination, animal husbandry, plant breeding, single-cell protein, antibiotics, microbes in food processing, parasites causing human diseases, bio-gas fertilizers, bio-control agents 

14 marks

Unit 4: Biotechnology and Its Applications 

Biotechnology, its principles, and applications, genetic engineering, genetically modified organisms, RNA interference, gene therapy, biosafety issues,  human insulin, applications of biotechnology in health and agriculture

10 marks

Unit 5: Ecology and Environment 

Organisms and populations, population interactions, ecological adaptations, structure and functions of the ecosystem, habitat, and niche, loss of biodiversity, ecosystem, conservation of biodiversity, national parks, wildlife, environmental issues, air pollution, radioactive waste management, biosphere reserves, solid waste management, ozone layer depletion, and deforestation 

14 marks


70 Marks 

CBSE Class 12 Biology Syllabus FAQs

#1 Why is the Class 12 Biology Syllabus important? 

Class 12 Biology syllabus is an important paper that helps you in study preparation for the board exam. When you have a list of all the topics to be studied for the exam, you can produce a study plan accordingly. The syllabus also helps you keep a report of all your learning progress. You can color-code the topics based on their difficulty or the questions that you have developed and are yet to be done. The syllabus also means the exam guide and the marking scheme for biology Class 12. 

#2 What is the syllabus for CBSE Class 12 Biology practical examination? 

The practical examination comprises 30 marks in total. Students will be assessed based on one major experiment, one minor experiment, slide preparation, spotting, viva voce, and project record. 

#3 How to prepare for the Class 12 Biology exam? 

Read the CBSE syllabus for Class 12 Biology carefully and identify the exam guide and labeling scheme. 

Complete all the basic theories and do not study any additional topics. Prefer viewing only NCERT books. 

Use flashcards to memorize relevant terms and diagrams, for instance, the structure of a cluster et cetera

Practice previous year board exam papers and sample papers to know your areas of weaknesses and strengths in the subject 

Take online CBSE coaching from expert tutors to understand all the typical ideas of biology and biotechnology with ease 

#4 How can AskIITians help you to prepare for Class 12 Biology? 

Download the complete syllabus for CBSE Class 12 Biology 2021-22 from the askIITians website and begin your readiness with our study resources. We follow the latest CBSE guidelines and exam pattern to build the best study resources for Class 12 Biology: 

  • Revision Notes, Chapter Notes
  • Class 12 Biology NCERT Solutions 
  • Online lessons, Pre-recorded Lessons, Live Classes
  • Previous Year Papers for Class 12 Biology 
  • Mindmaps, Study Planners, Flashcards
  • Chapter tests, Unit tests & more! 

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