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With the CBSE Class 12 examinations scheduled to start in February 2026, students can utilise free study materials on the board's official website. But here students can find comprehensive details to prepare well for the CBSE Class 12 Biology paper. This includes syllabus, previous year's question papers, deleted topics, and official sample papers to help you do last minute preparation and revision. Check the full article to access the materials to kick start your revision.
Check: CBSE Class 12 Syllabus 2025-26 (Arts, Commerce, Science)
CBSE Class 12 Biology Exam 2026: Key Highlights
| Particulars | Details |
| Board | Central Board of Secondary Education (CBSE) |
| Exam Date | Starting February 2026 |
| Total Marks | 100 (Theory: 70 |
| Theory Duration | 3 Hours |
| Question Typology | MCQs, Case-based, and Descriptive |
| Official Website |
CBSE Class 12 Biology Syllabus 2025-26
Here students can find CBSE Class 12 Biology Syllabus for the academic year 2025-26. It is aimed to provide practical and theoretical details as per the latest CBSE curriculum.
The paper carries 70 marks, and is divided into five main modules that offer a quick understanding of biological concepts. Some high weightage chapters include Genetics and Evolution (20 points) and Reproduction (16 marks), which continue to be essential to the curriculum.
CBSE Class 12 Biology Syllabus 2025-26 |
CBSE Class 12 Biology Exam Pattern 2025-26
The exam is typically for 100 marks that includes an 80-mark theory paper and 20 marks for internal assessment. The type of questions include multiple-choice questions (MCQs), objective MCQs (20%) and classic descriptive short and long-answer questions (30%), to promote good understanding of the topics from the syllabus.
| Unit No. | Unit Name | Chapters Included | Marks |
| VI | Reproduction | • Sexual Reproduction in Flowering Plants • Human Reproduction • Reproductive Health | 16 |
| VII | Genetics and Evolution | • Principles of Inheritance and Variation • Molecular Basis of Inheritance • Evolution | 20 |
| VIII | Biology and Human Welfare | • Human Health and Diseases • Microbes in Human Welfare | 12 |
| IX | Biotechnology and its Applications | • Biotechnology - Principles and Processes • Biotechnology and its Applications | 12 |
| X | Ecology and Environment | • Organisms and Populations • Ecosystem • Biodiversity and its Conservation | 10 |
Access the complete CBSE class 12 Biology exam pattern for 2026 from the link shared in the table.
CBSE Class 12 Biology Exam Pattern 2026 |
Also check: CBSE Class 12 Exam Pattern 2026: All Subjects
CBSE Class 12 Biology Deleted Syllabus 2025-26
Some of the chapters are deleted from the curriculum tio reduce the load for students. The CBSE Class 12 Biology Deleted Syllabus for 2025–2026 includes important sections from the NCERT textbooks. These chapters are Reproduction in Organisms, Strategies for Enhancement in Food Production, and Environmental Issues.
CBSE Class 12 Biology Deleted Syllabus 2026 |
Also check: CBSE Class 12 Syllabus 2025-2026 Released for Skill Subjects
CBSE Class 12 Biology Important Questions 2025-26
To do better in CBSE Class 12 Biology Board Exam 2026, students can focus on important topics to improve their score in biology paper. Students can take help from NCERT and practice solving problems like Genetics and Evolution (20 marks) and Reproduction (16 marks) etc.
CBSE Class 12 Biology Case Based Questions |
CBSE Class 12 Biology Sample Papers 2025-26
The most essential way to revise and score well in the exam is to practice the officially released Sample Question Papers (SQPs). On CBSE's official website students can find officially released sample papers for 2025-26. Students can also access CBSE Class 12 Biology sample question paper from the direct link shared here.
CBSE Class 12 Biology Sample Paper 2025-26 |
Also check: CBSE Class 12 Study Material 2026
CBSE Class 12 Biology: 5-Month Study Plan for Board Exam 2026
Following a 5-month study plan for the CBSE Class 12 Biology Board Exam 2026 is an easy way to maintain your pace and stick to your preparation subject-wise. Students can follow the routine shared below to prepare well for Biology.
| Month / Phase | Unit & Chapter Focus | Key Strategy & Activities |
| Month 1: October (Conceptual Mastery I) | Genetics & Evolution (20 Marks) | • Finish ~30% of the syllabus. • Master Mendelian crosses and molecular diagrams like DNA replication and transcription. |
| Month 2: November (Conceptual Mastery II) | Reproduction (16 Marks) Biology & Human Welfare (12 Marks) | • Focus on human physiology diagrams (male/female systems). • Master concepts of immunity, vaccines, and common pathogens. |
| Month 3: December (Conceptual Mastery III) | Biotechnology (12 Marks) Ecology & Environment (10 Marks) | • Complete 100% of the syllabus. • Focus on rDNA technology steps and biodiversity conservation laws. |
| Month 4: January (Revision & Consolidation) | All 5 Units (Full Syllabus) | • First intensive revision cycle. • Create "Difference Charts" (e.g., Active vs. Passive Immunity) and short notes for definitions. |
| Month 5: February (Simulation & Final Polish) | Complete Exam Readiness | • Solve at least 8-10 full-length sample papers under 3-hour timed conditions. • Final diagram practice and error analysis of previous mocks. |
As there is not much time left to follow the above routine, students can still check out the study plan shared below to do a quick review for the upcoming exam.
CBSE Class 12 Biology 5 Month Study Plan for Board Exam 2026 |
CBSE Class 12 Biology Previous Year Question Papers
CBSE releases several practice papers for students to practice for the exam and get accommodated with the exam pattern. For Class 12 Biology Previous Year Question Papers students can utilize it to practice well and score good in the upcoming exam.
As long as you solve Biology papers from the last 5 to 10 years, students can understand the repetitive questions from different chapters. So utilise the materials for revision, regular practice and elevate your preparation process.
CBSE Class 12 Biology Previous Year Question Papers |
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