Bihar Board Class 12 Biology Syllabus 2025: The Bihar Board releases the syllabus for each subject, including Biology to give students a detailed insight into the functioning of living organisms, human health, genetics, and environmental sustainability. It is designed to help students understand biological processes through both theoretical knowledge and practical activities.
This syllabus is divided into five core units covering topics such as Reproduction, Genetics & Evolution, Biotechnology, and Ecology. Along with the written exam, practical assessments also hold significant marks. It ensures that students understand the working of biological concepts along with theoretical knowledge.
Bihar Board Class 12 Science Syllabus
Bihar Board Class 12 Biology Syllabus 2025 Overview
Students must have a clear understanding about the Bihar Board Class 12 Syllabus in order to prepare well for the academic exams. Here’s the Bihar Board Class 12 Biology Syllabus 2025 Overview:
|
Bihar Board Class 12 Biology Syllabus 2025 Overview
|
|
Parameter
|
Details
|
|
Official Website
|
biharboardonline.bihar.gov.in
|
|
Subject Name
|
Biology
|
|
Subject Code
|
044
|
|
Class
|
12th (Intermediate)
|
|
Board
|
Bihar School Examination Board (BSEB)
|
|
Academic Year
|
2025-26
|
|
Total Marks
|
100 (Theory: 70 + Practical: 30)
|
|
Duration
|
3 Hours
|
|
Question Types
|
VSA (1M), SA-I (2M), SA-II (3M), LA (5M)
|
|
Prescribed Book
|
NCERT Class 12 Biology
|
Bihar Board Class 12 Chemistry Syllabus
Bihar Board Class 12 Biology Syllabus 2025 Exam Pattern
Bihar Board 12th Exam Pattern helps students get an idea about the types of questions to be prepared to score well in the exams. The final exam consists of 100 marks. 70 marks are allotted for the written exam and 30 marks for practicals. The paper duration is 3 hours. Here is the exam pattern given:
|
Bihar Board Class 12 Biology Syllabus 2025 Exam Pattern
|
|
S. No.
|
Typology of Questions
|
VSA (2M)
|
SA-I (2M)
|
SA-II (3M)
|
LA (5M)
|
Total Marks
|
% Weightage
|
|
1
|
Remembering
|
2
|
1
|
1
|
-
|
7
|
10%
|
|
2
|
Understanding
|
-
|
2
|
4
|
1
|
21
|
30%
|
|
3
|
Application
|
-
|
2
|
4
|
1
|
21
|
30%
|
|
4
|
Evaluation & Analysis
|
2
|
1
|
1
|
1
|
12
|
17%
|
|
5
|
Creating
|
1
|
1
|
2
|
-
|
9
|
13%
|
| |
TOTAL
|
5
|
7
|
12
|
3
|
70
|
100%
|
Bihar Board Class 12 English Syllabus
Bihar Board Class 12 Maths Syllabus
Bihar Board Class 12 Biology Syllabus 2025 Marking Scheme
To perform well in the Biology Bihar Board exam, it’s essential to understand how marks are distributed across chapters. The Bihar Board follows a chapter-wise weightage pattern, which not only helps students prioritize their study schedule but also helps students focus on revision of important chapters.
Units like Genetics and Evolution and Ecology carry high weightage of marks because of their importance in the field of Science. Every unit should be given importance based on their marking scheme. You must also go through the previous years’ papers to analyse the exam pattern and the frequently repeated topics. Here is the marking scheme of the Biology syllabus:
Bihar Board Class 12 Biology Syllabus 2025 Marking Scheme
|
|
Unit No.
|
Chapter Name
|
Marks
|
|
VI
|
Reproduction
|
14
|
| |
- Reproduction in Organisms
|
| |
- Sexual Reproduction in Flowering Plants
|
| |
- Human Reproduction
|
| |
- Reproductive Health
|
|
VII
|
Genetics and Evolution
|
18
|
| |
- Principles of Inheritance and Variation
|
| |
- Molecular Basis of Inheritance
|
| |
- Evolution
|
|
VIII
|
Biology and Human Welfare
|
14
|
| |
- Human Health and Disease
|
| |
- Strategies for Enhancement in Food Production
|
| |
- Microbes in Human Welfare
|
| |
- Cancer, Drug and Alcohol Abuse (from NCERT box)
|
|
IX
|
Biotechnology and Its Applications
|
10
|
| |
- Biotechnology: Principles and Processes
|
| |
- Biotechnology and Its Applications
|
|
X
|
Ecology and Environment
|
14
|
| |
- Organisms and Population
|
| |
- Ecosystem
|
| |
- Biodiversity and Conservation
|
| |
- Environmental Issues
|
|
Total
|
|
70
|
Bihar Board Class 12 Computer Science Syllabus
Bihar Board Class 12 Biology Syllabus 2025 Practical Assessment
Bihar Board Class 12 Biology Syllabus 2025 Practical Assessment tests students' understanding through experiments, viva, and record maintenance. It is included in the curriculum to assess practical application and conceptual clarity.
Students must prepare well for the practical examination as it carries 30 marks in total. You must practice for the practical assessment in order to secure good marks in the examination. Here’s the marking scheme:
Practical Evaluation (30 Marks)
|
|
Evaluation Scheme
|
Marks
|
|
One Major Experiment
|
5
|
|
One Minor Experiment
|
4
|
|
Slide Preparation
|
5
|
|
Spotting
|
7
|
|
Practical Record + Viva Voce
|
4
|
|
Project Record + Viva Voce
|
5
|
|
Total
|
30
|
Bihar Board Class 12th Model Papers
How to Prepare for Bihar Board Class 12 Biology Exam 2025?
Here are some ways through which you can prepare for the Bihar board exams 2025:
-
Begin your preparation with the NCERT as it sets a strong foundation for basic concepts. Cover topics from NCERT, especially units like Reproduction, Genetics, and Biotechnology as they carry high weightage.
-
Make use of notes of diagrams and definitions as it plays a major role in Biology. Labelled diagrams from chapters like Human Reproduction, Molecular Basis of Inheritance, and Microbes in Human Welfare are scoring.
-
Practice board questions as it will help you determine the high-weightage units like Genetics & Evolution and Ecology and you will also understand the exam pattern and the important topics.
-
For experiments like pollen germination and isolating DNA, practice observation-based questions and common viva questions.
-
To test your knowledge, take a regular mock test within the exam duration i.e., 3 hours. This will help you improve your speed and accuracy, especially for sections like Long Answer and Application-based questions.
