Important Questions & Topics of Biology

This is the updated, high-probability important questions collection for CBSE Class 12 Biology Board Exam 2026-27 (exam on 27 March 2027).

Based on latest trends from CBSE sample papers 2025-26, PYQs, and expert analysis (high-weightage chapters like Genetics & Evolution get maximum focus).

Students who revise only this can easily secure passing marks (33/70), and with diagrams + 5-markers, aim for 50-70+.