Board Exam · chapter-wise preparation

Class 12 Biology — every chapter, in marks order

Class 12 Biology board exam preparation: the previous-year board papers and the CBSE sample papers, sat as the real exam and marked against the scheme — then every chapter in marks order with its lesson and practice set.

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.

પ્રકરણગુણDo
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