CBSE Class 12 Biology Exam Pattern and Marking Scheme 2025: With the CBSE Class 12 Biology Board Exam just a day away, understanding the question paper pattern, marking scheme, and chapter-wise weightage is crucial for last-minute preparation. This guide provides a clear breakdown of how the exam is structured, the types of questions asked, and the marks allocated to each section. It also highlights chapter-wise weightage, helping students prioritize important topics for maximum scoring potential. By reviewing this pattern, students can focus on high-weightage chapters, manage their time effectively, and approach the exam with confidence.
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CBSE Class 12 Biology Sample Paper by Experts for Board Exam 2025
Top 50 MCQs for CBSE Class 12 Biology Exam 2025
CBSE Class 12 Biology Unit-Wise Weightage
There are a total of five units students have to prepare for the 2024-25 CBSE Class 12 Biology annual examination. These units have their individual weightage, thus, invest your efforts as per the allocated marks.
| Unit | Title | Marks |
| VI | Reproduction | 16 |
| VII | Genetics and Evolution | 20 |
| VIII | Biology and Human Welfare | 12 |
| IX | Biotechnology and its Applications | 12 |
| X | Ecology and Environment | 10 |
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| Total | 70 |
For more details on the practical and theory syllabus along with the list of practicals, check the CBSE Class 12 Biology Syllabus 2024-25.
CBSE Class 12 Biology Question Paper Design
Here is a descriptive table for the CBSE Class 12 Biology Question Paper Design for 2025, based on competency distribution:
| Competency | Description | Weightage (%) | Marks (out of 70) | Question Types Included |
| Demonstrate Knowledge and Understanding | Assessing students' ability to recall, comprehend, and explain fundamental concepts, definitions, and facts. | 50% | 35 | Objective-type questions, Very Short Answer, Short Answer |
| Application of Knowledge/Concepts | Evaluates the application of biology concepts and theories in real-life scenarios, experiments, and case studies. | 30% | 21 | Case-based questions, Application-based Short Answer |
| Analyse, Evaluate, and Create | Tests analytical skills, critical evaluation, data interpretation, and creative thinking in biological contexts. | 20% | 14 | Case-based questions, Long Answer, Analysis-based Short Answer |
Summary:
- Total Marks: 70
- Focus on Competencies: The design allocates 50% to understanding basic knowledge, 30% to application, and 20% to higher-order analytical skills. This structure encourages students to build a comprehensive understanding, practical application, and critical analysis skills essential for biology.
Solve the latest CBSE Class 12 sample papers 2024-25 that follows this pattern to prepare effectively for the 2025 board exams.
CBSE Class 12 Biology Exam Pattern 2025 Key Highlights
Here's a table summarising the exam paper pattern:
| Section | Number of Questions | Marks per Question | Total Marks | Question Type |
| Section A | 16 | 1 | 16 | Short answer questions |
| Section B | 5 | 2 | 10 | Short answer questions |
| Section C | 7 | 3 | 21 | Medium answer questions |
| Section D | 2 | 4 | 8 | Case-based questions |
| Section E | 3 | 5 | 15 | Long answer questions |
Additional Instructions:
- Compulsory: All questions must be answered.
- Choice: No overall choice, but internal choices are provided for some questions.
- Diagrams: Neat, labelled diagrams are required wherever applicable.
This table provides a structured overview of the exam format to help students understand the distribution of marks and types of questions.
Also Check:
NCERT Study Material:
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