BSEB 12th Biology Exam Pattern 2025-26 - Check Marking Scheme
Table of Contents
The Bihar board has released the exam pattern for Class 12th Biology on its official website. The BSEB 12th Biology exam pattern 2025–2026 explains the marking scheme of the various sections of the biology question paper, the types of questions in it, the marks assigned to various questions and sections, the weighting of all the various topics in the syllabus, and the negative marking in the exam. By examining the exam pattern, you can ascertain which chapter or unit requires the greatest focus and what types of questions will be asked in the BSEB Class 12th exam 2026.Â
To properly prepare for the upcoming board exams, it is advised that you go over the BSEB 12th Exam Pattern 2026. You can focus more on the important subjects and prepare more effectively if you are aware of the BSEB 12th Biology test pattern for 2025–2026. To make use of the test pattern for your preparation, schedule your study time according to the marking scheme of the different question types and topic weights. The BSEB 12th Biology exam paper covers both objective and subjective question categories. Additionally, there are no negative markings. Your board exam score will therefore increase as a result of the exam pattern.
The exam pattern may be seen at the official Bihar board website at biharboardonline.bihar.gov.in. For those of you doing your 12th boards in the 2025–2026 academic year, this page contains the BSEB 12th Biology exam pattern.
Also read: Bihar class 12 Biology syllabus 2026Â
BSEB 12th Biology exam pattern 2026 - Section Wise
The Bihar 12th board exams are worth 100 marks, of which 30 are for the practical and 70 are for the theory paper.The two sections of the biology theory paper have a total score of 70.Section A consists of 70 multiple-choice questions (MCQs), each scoring 1 mark, out of which 35 have to be answered for a total of 35 marks. For a total of 35 marks, Section B consists of 20 short answer type questions, each worth 2 marks out of which 10 questions have to be answered and 6 long answer type questions, each worth 5 marks out of which 3 questions have to be answered.The exam has a 3 hours 15 minutes time limit. The BSEB 12th Biology Exam Pattern 2026 is detailed in the table below:
| Section | Number of questions | Marks Allotted |
|---|---|---|
| A | 35 out of 70 | 1 mark for each question |
| B | 10 out of 20 + 3 out of 6 = 13 | 2 marks for each short answer type question + 5 marks for each long answer type question |
Also read: Bihar Class 12 Admit Card 2026
BSEB 12th Biology Marking Scheme 2026Â
You can better understand how you need to study for each chapter by looking at the marking scheme for the different biology curriculum chapters. The BSEB 12th Biology Marking Scheme 2026Â is given in the following table:
| Sections | Type of Questions | Number of Questions | Marks Allotted |
|---|---|---|---|
| Reproduction in Organisms | Varies | Varies | 6 |
| Sexual Reproduction in Flowering Plants | Varies | Varies | |
| Human Reproduction | Varies | Varies | |
| Reproductive Health | Varies | Varies | |
| Principles of Inheritance and Variation | Varies | Varies | 18 |
| Molecular Basis of Inheritance | Varies | Varies | |
| Evolution | Varies | Varies | |
| Human Health and Disease | Varies | Varies | |
| Strategies for Enhancement in Food Production | Varies | Varies | 18 |
| Microbes in Human Welfare | Varies | Varies | |
| Cancer, Drug and Alcohol Abuse | Varies | Varies | |
| Biotechnology: Principles and Processes | Varies | Varies | 18 |
| Biotechnology and its Applications | Varies | Varies | |
| Organisms and Population | Varies | Varies | 10 |
| Ecosystem | Varies | Varies | |
| Biodiversity and Conservation | Varies | Varies | |
| Environmental Issues | Varies | Varies | |
| Total | Â | 96 | 70 |
Also read: BSEB Class 12 sample papers 2026
BSEB 12th Biology Unit Wise Marking Scheme 2026Â
The weight assigned to each unit in the BSEB 12th Biology syllabus varies.Understanding the BSEB 12th Biology unit-by-unit marking approach is essential for effective study. The BSEB 12th Biology unit wise marking scheme 2026 is given the table down below:
| Units | Weightage % | Marks Allotted |
|---|---|---|
| Sexual Reproduction | 8% | 6 |
| Genetics and Evolution | 26% | 18 |
| Biology and Human Welfare | 26% | 18 |
| Biotechnology and its Applications | 26% | 18 |
| Ecology and Environment | 14% | 10 |
Also read: BSEB Class 12 Biology Deleted Syllabus 2026Â
How to use BSEB 12th Biology exam pattern 2026?
Understanding the BSEB 12th Biology exam pattern 2026 is essential so that you can easily make a study schedule and prepare for the board exams. The BSEB 12th Biology exam pattern 2026 can be used in the manner listed below:
- Analyze each chapter's question kinds and make sure your responses are appropriate.
- Allocate more time to chapters with higher grade allocations.
- Keep your focus on the most crucial pieces.
- Try to finish your answers within the allotted time for the test.
- If the question is merely objective and appears in a chapter, don't waste your time practicing composing an answer.
- Complete the previous year's sample and question papers.
You can visit this page frequently to get all the information you need to know about the BSEB 12th Biology Exam Pattern 2025–2026 before sitting for the BSEB 12th board exams.
FAQs on BSEB 12th BSEB 12th Biology Exam Pattern
Q: What are the maximum marks for the BSEB 12th Biology theory exam?
Q: What is the maximum time allotted to the BSEB 12th Biology exam?
Q: How many sections are there in the BSEB 12th Biology question paper?
Q: Which units in BSEB 12th Biology have the maximum marks?
Q: How many questions are there in the BSEB 12th Biology question paper?
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