CBSE Class 12 Biology Blueprint 2027
Unit-wise marks weightage, competency breakdown (case studies & assertion-reason), and high-yield preparation tips.
Based on official CBSE Senior School Curriculum. Features 50% Competency-focused questions (MCQs, Case-based, Source-based).
CBSE Examination Pattern (50% Competency Focus)
Section A (16 MCQs including 4 A&R = 16M), Section B (5×2M = 10M), Section C (7×3M = 21M), Section D (2×4M Case-based = 8M), Section E (3×5M = 15M).
Unit-wise Marks Distribution (2026-27 CBSE Syllabus)
5 Units Total| # | Unit / Chapter Title | Weightage | Priority |
|---|---|---|---|
| 1 | Reproduction in Organisms & Flowering Plants | 16 Marks | Critical |
| 2 | Genetics and Evolution | 20 Marks | Critical |
| 3 | Biology and Human Welfare | 12 Marks | High |
| 4 | Biotechnology and its Applications | 12 Marks | High |
| 5 | Ecology and Environment | 10 Marks | High |
KCET 50:50 Board + CET Target Calculator
Simulate how your Class 12 / 2nd PUC theory marks combine with your KCET score to decide your final Karnataka Engineering rank.
1 Class 12 / 2nd PUC Theory Marks
PCM Theory Only2 Target KCET 2027 Score
Total / 180 Marks3,500 – 7,500 (Tier-1 ECE / Tier-2 CSE)
Based on historical KEA normalized rank bands.
Your Board marks are only half the equation.
For CBSE Class 12 (2027) (Biology), board theory marks directly dictate admission eligibility and state merit ranks. See what entrance score you need to target for top institutions.
IITs, NITs, and IIITs admissions via JoSAA counselling.
CBSE students with Karnataka domicile eligibility can compete for top KEA engineering seats.
National candidates applying for Bangalore top private colleges (RVCE, BMSCE, MSRIT).