CBSE 12th Biology Sample Paper: The Central Board of Secondary Education (CBSE) has released the Class 12 Biology Sample Paper 2025-26 on its official website- cbseacademic.nic.in. This sample paper is designed to help students understand the latest exam pattern, chapter-wise marks distribution, and the overall level of difficulty. It contains different types of questions, including very short, short, and long answer questions, similar to those asked in the actual board exam. Along with this, CBSE has also provided a detailed marking scheme to guide students on the correct way of presenting their answers. With these features, the sample paper becomes an essential resource for Class 12 students aiming to score high marks in Biology. In this article, we will explain everything about the CBSE Class 12 Biology Sample Paper – from how to download it to its structure and benefits for exam preparation.
CBSE Class 12 Biology Sample Papers and Marking Scheme PDF
CBSE has released the Class 12 Biology Sample Paper 2025-26 along with the marking scheme on its official website. The board has kept the paper pattern the same as last year (2024-25). The sample paper includes 33 compulsory questions divided into five sections- A, B, C, D, and E. Section A has MCQs (Q1-12) and Assertion-Reason questions (Q13-16), each of 1 mark. Section B contains Very Short Answer questions (Q17-21) worth 2 marks each, while Section C includes Short Answer questions (Q22-28) carrying 3 marks each. Section D features Case Study-based questions (Q29-30) of 4 marks each, and Section E has Long Answer questions (Q31-33) worth 5 marks each. There is no overall choice in the paper, but internal choices are given in some questions across Sections B to E. Students can use the direct links below to download the CBSE Class 12 Biology Sample Paper and Marking Scheme.
CBSE Class 12 Biology Sample Paper 2025-26
CBSE Class 12 Biology Marking Scheme 2025-26
CBSE Class 12 Biology Paper Format 2025-26
The CBSE Class 12 Biology question paper is divided into five sections with a total of 33 compulsory questions. The paper is designed with different types and levels of questions. While there is no overall choice, students will get internal choices in some questions across different sections. The detailed Biology exam pattern is given below:
| Section | Number of Ques | Marks/Qs | Marks | Type of Ques | Internal Choice |
| Section A (Q.1- Q.16) |
16 | 1 | 16 | MCQs, A&R | No |
| Section B (Q.17- Q.21) |
5 | 2 | 10 | VSA | 1 |
| Section C (Q.22- Q.28) |
7 | 3 | 21 | SA | 1 |
| Section D (Q.29- Q.30) |
2 | 4 | 8 | Case Study-based | In sub-parts |
| Section E (Q.31- Q.33) |
3 | 5 | 15 | LA | 3 |
| Total | 33 | - | 70 |
Benefits of Solving CBSE Class 12 Biology Sample Paper
Solving the CBSE Class 12 Biology Sample Paper is a smart way to strengthen your exam preparation. It helps students understand the latest exam pattern and boosts confidence with regular practice. Attempting the paper within the given time improves speed, accuracy, and time management. It also highlights weak areas that need more revision and teaches the correct way to write answers as per the CBSE marking scheme. Along with these, the sample paper offers many other benefits, some of which are listed below:
- Understand Latest Exam Pattern: Helps students understand the latest paper format, types of questions, and chapter-wise weightage.
- Time Management Practice: Practising within the exam duration teaches students how to allocate time to different sections.
- Identify Weak Areas: Solving papers shows which topics need more revision and practice.
- Improve Accuracy & Confidence: Regular practice increases speed, reduces mistakes, and builds exam confidence.
- Learn the Right Answer Format: The marking scheme guides students on how to frame answers for maximum marks.
- Real Exam Experience: Attempting the paper under timed conditions reduces exam stress and prepares students for the actual board exam.
How to Use the CBSE 12th Biology Sample Paper Effectively?
Simply downloading the sample paper isn't enough-using it the right way is key to scoring well in the board exam. To get the maximum benefit, students should treat the sample paper like the actual exam and follow a proper strategy while solving it. Here are some smart ways to use the CBSE Class 12 Biology Sample Paper effectively for better preparation and performance.
- Print the paper and attempt the paper in 3 hours without breaks to simulate real exam conditions.
- Allocate time to each section and finish within the set limit.
- Avoid looking at the marking scheme while solving.
- Compare your answers with the official marking scheme to learn the right answer format.
- Identify weak areas and revise those topics again.
- Practice writing neat, structured answers as expected in board exams.
- Repeat this every 10-15 days to track your improvement.
CBSE Class 12 Biology Board Exam Preparation Strategy
Scoring well in the CBSE Class 12 Biology board exam requires a clear study plan and consistent practice. A well-structured preparation strategy helps students manage time, cover the entire syllabus, and focus on important topics. Below are some effective tips and strategies that can guide students to prepare smartly and confidently for the Biology board exam.
- Go through the official syllabus and unit-wise marks distribution to focus on high-weightage chapters like Genetics, Evolution, and Reproduction.
- Focus on NCERT textbooks and examples.
- Prepare short notes for each chapter, highlighting key terms, diagrams, and definitions for quick revision.
- Diagrams are scoring in Biology; practice them neatly and label correctly.
- Most questions in board exams are based on the NCERT, so revise each line carefully.
- Study Biology daily in short sessions instead of last-minute cramming.
- Practice previous year board questions and sample papers side by side.
- Revise topics weekly to avoid forgetting concepts closer to the exam.
- Write answers in clear, step-by-step points instead of long paragraphs.
CBSE Class 12 Biology Syllabus 2025-26
The Central Board of Secondary Education (CBSE) has released the Biology Syllabus for Class 12 Science streams for the 2025-26 academic year. This Biology Syllabus outlines the course structure, chapters, and topics that students will need to study in the subject. The CBSE Class 12 Biology syllabus covers a wide range of topics, including Reproduction, Genetics, Biology & Human Welfare, Biotechnology & its Applications and Ecology and Environment. It is divided into units with specific weightage, helping students plan their preparation effectively. The unit-wise chapters and weightage are provided below:
| Unit No. | Unit Name | Chapter Name | Marks |
| I | Reproduction | Sexual Reproduction in Flowering Plants Flower structure Human Reproduction Reproductive Health |
16 |
| II | Genetics and Evolution | Principles of Inheritance and Variation Heredity and variation Molecular Basis of Inheritance Evolution |
20 |
| III | Biology and Human Welfare | Human Health and Diseases Microbes in Human Welfare |
12 |
| IV | Biotechnology and its Applications | Biotechnology - Principles and Processes Biotechnology and its Applications |
12 |
| V | Ecology and Environment | Organisms and Populations Ecosystems Biodiversity and its Conservation |
10 |
| Total | 70 | ||
| Practical | 30 |
Check the latest and detailed CBSE Class 12 Biology Syllabus 2025-26; Check Latest Unit-wise Weightage, Download PDF.
CBSE Class 12 Biology Exam Pattern 2025
CBSE has released the exam pattern and marking scheme for the 2025-26 academic year. Based on the official question paper design shared the board has followed the same exam pattern and marking scheme as in 2024-25. The CBSE Class 12 Biology board exam for 2025-26 will also consists of a theory paper of 70 marks and a Practical of 30 marks. The question paper was divided into five different sections:
| Section | Question Type | Number of Questions | Marks |
| A | Multiple Choice Questions & Assertion and Reason Questions (1 mark) | 16 | 16 |
| B | Very Short Answer (2 mark) | 5 | 10 |
| C | Short Answer (3 marks) | 7 | 21 |
| D | Case Study-Based Questions (4 marks) | 2 | 8 |
| E | Long Answer (5 marks) | 3 | 15 |
| Total | 33 | 80 | |
Check the latest and detailed CBSE Class 12th Biology Exam Pattern 2025-26 with Marking Scheme.