CBSE Class 12 Biology syllabus 2020-21

CBSE Class 12 Biology syllabus is training for board exam mixtures. Referring to the syllabus will help you read the curriculum for the Biology subject evenly, helping you to maintain track of all the topics and divisions to be cooked for keep exams. The syllabus covers the marking design of the Biology exam that can help you select which topics to cover first and how to progress with the learning. The syllabus also combines topics for practical examination, counseled books, and the internal appraisal marking project for Class 12 Biology. 

Class 12 Biology Syllabus comprises topics like asexual replication – binary fission, the fabrication of the flower, seed dispersal significance, budding, sporulation, and fragmentation, vegetative propagation, pollination, and fruit writing. You will also study the concepts of the estate such as codominance, chromosomes, blood collections, and genes. You will learn about DNA, RNA, genetic code, gene expression, and how life commenced and was produced. Other topics include how various residents live in appropriate habitats, ecosystems, and community qualities. 

You can the CBSE Class 12 Biology syllabus from the askIITians website efficiently for your firm. Along with the Class 12 syllabus for Biology, appointments, and study detailers. You can enlist in our live classes, we also proffer a complete CBSE study matter. This includes chapter notes, revision notes, mindmaps, flashcards, mock tests, test series, where our schoolgirls will teach you all the basic to complex ideas in easy-to-understand dictionary. Our study rocks are completely based on the most delayed CBSE syllabus and exam pattern for Class 12 Biology. 

Chapter-wise CBSE Class 12 Biology Syllabus 


The Class 12 Biology syllabus for 2021-22 controls 5 units and 16 chapters. These units comprise 70 marks in total while 30 marks are allocated to influential analysis and subjective estimates. 

CBSE Class 12 Biology Syllabus.

Unit 1: Reproduction 

Reproduction, flower structure, vegetative breeding in plants, male and female conceptive systems, modes of propagation, sexual and asexual reproduction, pollination, reproductive spirit, birth control 

14 marks

Unit 2: Genetics and Evolution 

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

18 marks

Unit 3: Biology and Human Welfare 

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

14 marks

Unit 4: Biotechnology and Its Applications 

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

10 marks

Unit 5: Ecology and Environment 

Organisms and populations, air pollution, contaminated waste management, solid waste management, ozone layer depletion, ecological adaptations, structure and purposes of the ecosystem, loss of biodiversity, ecosystem, habitat and niche, people interactions, biosphere reserves, environmental issues, conservation of biodiversity, national playgrounds, wildlife, and deforestation 

14 marks


70 Marks 

CBSE Class 12 Biology Syllabus FAQs

#1 Why is the Class 12 Biology Syllabus fixed? 

Class 12 Biology syllabus is a critical record that helps you in study preparation for the board exam. When you have a file of all the topics to be studied for the exam, you can imagine a study plan consequently. The syllabus also helps you grasp a document of all your scholarship courses. You can color-code the topics based on their assessment or the questions that you have developed and are yet to be prepared. The syllabus also implies the exam model and the marking design for biology Class 12. 

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

The practical examination compounds 30 marks in total. Students will be assessed based on one major research, one minor exercise, slide formation, practical record, viva voce, spotting, and project record. 

#3 How to assist with the Class 12 Biology exam? 

  • Read the CBSE syllabus for Class 12 Biology carefully and distinguish the exam guide and sealing design. 
  • Complete all the basic methods and do not study any additional topics. Prefer reservations only NCERT books. 
  • Use flashcards to memorize critical terms and diagrams, for instance, the building of an assembly et cetera
  • Practice previous year board exam papers and sample papers to recognize your areas of frailties and strengths in the subject 
  • Take online CBSE coaching from skillful tutors to learn all the typical principles of biology and biotechnology with satisfaction 

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

Download the total syllabus for CBSE Class 12 Biology 2021-22 from the askIITians website and begin your option with our study resources. We follow the latest CBSE guidelines and exam original to perform the best study numbers for Class 12 Biology: 

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

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