CBSE Class 12 Biology Important Questions 2026-27
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Biology
CBSE Class 12 Biology important questions, 2026-27
These are not guesses. We counted the marks of every chapter across 8 real CBSE board papers (2023 to 2026) and found the questions that were asked again in a later year. Use them to decide where to spend your time first.
A question that came before is not a promise it will come again; the paper changes every year. This is a guide to what the board has valued, from the papers themselves.
Chapters by marks in past board papers
- 1. Sexual Reproduction in Flowering Plants11% of all marks · about 9.3 marks a paper
- 2. Principles of Inheritance and Variation11% of all marks · about 9.1 marks a paper
- 3. Human Health and Disease11% of all marks · about 9.0 marks a paper
- 4. Molecular Basis of Inheritance10% of all marks · about 8.0 marks a paper
- 5. Human Reproduction10% of all marks · about 8.0 marks a paper
- 6. Biotechnology: Principles and Processes9% of all marks · about 7.8 marks a paper
- 7. Biotechnology and its Applications9% of all marks · about 7.6 marks a paper
- 8. Evolution6% of all marks · about 5.1 marks a paper
- 9. Microbes in Human Welfare6% of all marks · about 4.9 marks a paper
- 10. Biodiversity and Conservation6% of all marks · about 4.8 marks a paper
- 11. Reproductive Health5% of all marks · about 4.1 marks a paper
- 12. Organisms and Populations4% of all marks · about 3.3 marks a paper