August 5, 2021

CBSE Class 12 Biology Syllabus 2021 – Central Board of Secondary Education has advertised the latest syllabus for Class 12 Biology. Students can download the CBSE Class 12th Biology Syllabus 2021 using the link provided here. Also, they can access CBSE 12th Biology syllabus 2021 from the true website case. The CBSE syllabus 2021 Class 12 Biology consists of all the units, chapters, and topics for the system exam along with the circumstances of the practicals. Students can check the mark allotted for the individual part from the CBSE Class 12 Biology Syllabus 2021. The syllabus is available in pdf format, which students can refer to while reducing for the CBSE 12th exams.


Students will be able to check all the great and high-weightage topics from the syllabus and provide them accordingly for the exams. The CBSE 12th Class Biology Syllabus 2021 will be helpful in academics as well as dynamic exams. Read the complete article to perceive the CBSE Class 12 syllabus 2021 for biology.


What are the primary topics of the CBSE Class 12 Biology Syllabus 2020-21?

Some of the topics of each chapter are furnished here for ease of students. For a detailed CBSE 12th biology syllabus 2021, students can download the pdf file using the link provided above.

  • Sexual Reproduction in Flowering Plants:
    • Flower structure
    • Pollination
    • Pollen-pistil interaction
    • Post fertilization events, etc.
  • Human Reproduction
    • Menstrual cycle; fertilization,
    • microscopic anatomy of testis and ovary,
    • parturition (elementary idea); lactation (elementary idea), etc.
  • Reproductive Health
    • IVF, ZIFT, Amniocentesis,
    • contraception and medical terminus of pregnancy, etc.
  • Principles of Inheritance And Variation
    • Multiple alleles and legacy of blood groups,
    • Sex determination – in humans,
    • Birds and honey bees, color blindness, etc.
  • Molecular Basis of Inheritance
    • Genetic code, Translation,
    • Gene expression and regulation,
    • Structure of DNA and RNA, etc.
  • Human Health and Disease
    • Pneumonia, the common cold,
    • Basic concepts of immunology – vaccines;
    • Cancer, drug and alcohol abuse, etc.
  • Microbes in Human Welfare
    • Antibiotics;
    • Production, sewage treatment,
    • Energy generation, etc.
  • Biotechnology: Principles and Processes
    • Genetic Engineering (Recombinant DNA Technology).
  • Biotechnology and its Applications
    • Gene therapy;
    • Genetically modified animals, transgenic animals;
    • Biosafety issues, etc.
  • Organisms and Population
    • Mutualism, competition,
    • Predation, birth rate, and death rate,
    • The age distribution, etc.
  • Biodiversity and Conservation
    • Red Data Book,
    • Biosphere reserves, patterns, importance;
    • Loss of biodiversity, etc.

CBSE Class 12th Biology Syllabus 2021 for practical



One Major Experiment

5 Marks

One Minor Experiment

4 Marks

Slide Preparation

5 Marks


7 Marks

Practical Record+Viva Voce

4 Marks

Project Record + Viva Voce

5 Marks


30 Marks


Prescribed Books for CBSE Class 12 Biology

CBSE prescribed NCERT Books for Class 12 Biology to produce the CBSE Class 12th Biology Syllabus 2021. It is important to connect to the NCERT book as it covers the intact syllabus in a simple and easily understandable style. Relevant diagrams are also provided with each topic for more helpful knowledge. Below is the list of addressed books by CBSE:

  1. Biology, Class-XII, Published by NCERT
  2. Other related books and manuals transferred out by NCERT (including multimedia)
  3. Biology Supplementary Material (Revised). available on the CBSE website.

What chapters have been destroyed in the 12th Biology CBSE 2021?

  • Reproduction in Organism
  • Evolution
  • Strategies for Enhancement in Food Production
  • Ecosystem
  • Environmental Issues

CBSE Class 12 Biology Preparation Tips 2021

While preparing for the CBSE Class 12th, students must complete some simple but effective tips and tricks to score fine in the same. Coming to Biology, it is a subject which will help you score very well in case you take it give your best. Go through some of the best fitness tips for CBSE 12th Biology.

  • Complete the Class 12th CBSE Biology syllabus 2021 as soon as achievable so that you can give the greatest time for revision.
  • Students must refer to the CBSE class 12 timetable 2021 and plan their studies, therefore.
  • Do not mug up the theories of Biology, instead, try to understand the meaning of the same and make meticulous notes. These notes will help you to study at the latest moment.
  • After producing the Class 12 Biology Syllabus CBSE 2021, students must solve the CBSE Class 12 question papers. This will help them to know the exam origin, marking scheme, and material topics.
  • Dedicate maximum time for the review and do not overlook any doubts. Clear them right away. Seek help from others in case of difficulty. Also, do not stress about the provisions, instead, give your best and equate well in CBSE class 12 result 2021.


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