Sit the real paper
Previous-year board papers and the CBSE sample papers, word for word — three hours, server-timed, marked question by question against the official scheme, diagrams included. Two papers free on every account; unlimited on AI Plus. New papers are added through the season.
CBSE sample paper (1) — this session’s pattern
Previous-year papers for this subject are being added — each one is the real paper of its year, sat the same way.
Chapter by chapter, in marks order
Marks are the chapter’s approximate share of the Biology theory paper (CBSE 2026-27 unit weightage). Start from the top, then sit a paper above to see how the chapters are asked. Log in to see your own status per chapter.
| Chapter | Marks | Do |
|---|---|---|
Ch 1 – Sexual Reproduction in Flowering Plants Ch. 1 |
~5 | |
Ch 2 – Human Reproduction Ch. 2 |
~5 | |
Ch 3 – Reproductive Health Ch. 3 |
~5 | |
Ch 4 – Principles of Inheritance and Variation Ch. 4 |
~5 | |
Ch 5 – Molecular Basis of Inheritance Ch. 5 |
~5 | |
Ch 6 – Evolution Ch. 6 |
~5 | |
Ch 7 – Human Health and Disease Ch. 7 |
~5 | |
Ch 8 – Microbes in Human Welfare Ch. 8 |
~5 | |
Ch 9 – Biotechnology: Principles and Processes Ch. 9 |
~5 | |
Ch 10 – Biotechnology and its Applications Ch. 10 |
~5 | |
Ch 11 – Organisms and Populations Ch. 11 |
~5 | |
Ch 12 – Ecosystem Ch. 12 |
~5 | |
Ch 13 – Biodiversity and Conservation Ch. 13 |
~5 |