BSEB Bihar Board Class 12 Biology Answer Key: The Bihar Board Class 12 Biology Answer Key 2026 has been officially released by the Bihar School Examination Board (BSEB) for students today, who appeared in the Intermediate Annual Examination 2026. Candidates from the Science stream who took the Biology paper on February 2, 2026, can now download the answer key PDF from the official websites — biharboardonline.com and biharboard.co.
The release of the Bihar Board 12th Biology Answer Key 2026 is an important step in the post-exam process. It allows students to carefully match their responses with the officially provided answers and estimate their probable scores before the final result declaration. Since objective questions carry 50% of the total marks in the theory paper, checking the answer key becomes crucial in understanding your performance accurately.
Students are advised to download the Bihar Board Class 12 Biology Answer Key 2026 PDF at the earliest, calculate their estimated marks out of 70, and stay updated for further announcements regarding the Bihar Board Class 12 Result 2026, which is expected to be declared in mid-March.
Bihar Board Class 12 Biology Answer Key 2026 Overview
Here is a quick overview of the Bihar Board 12th Biology Answer Key 2026:
| Particulars | Details |
|---|---|
| Exam Conducting Body | Bihar School Examination Board (BSEB) |
| Exam Name | Bihar Board Intermediate Annual Examination 2026 |
| Article Name | Bihar Board 12th Biology Answer Key 2026 |
| Category | Answer Key |
| Session | 2025–26 |
| Biology Exam Date | February 2, 2026 |
| Answer Key Release Date | February 28, 2026 |
| Objection Window | Feb 28 – March 6, 2026 (5 PM) |
| Download Mode | Online |
| Official Website | biharboardonline.com, biharboard.co |
Bihar Board Class 12 Biology Answer Key 2026 Latest Update
The Bihar Board Class 12 Biology Answer Key 2026 has been officially released by the Bihar School Examination Board (BSEB) on March 1, 2026. The answer key will include solutions for all objective-type questions asked in the Intermediate Annual Examination 2026 and is available set-wise for different question paper series. Students who appeared for the Biology exam on February 2, 2026, can download the official answer key from biharboardonline.com or biharboard.co to cross-check their responses.
The Board has also activated the objection window, allowing candidates to raise challenges against any incorrect answer within the prescribed deadline. After reviewing the objections, BSEB will publish the revised/final answer key, which will be used for the evaluation of OMR sheets and preparation of the Bihar Board Class 12 Result 2026.
Bihar Board Class 12 Biology Answer Key 2026 PDF Download
The Bihar Board Class 12 Biology Answer Key 2026 PDF has been available for download on the official websites of the Bihar School Examination Board — biharboardonline.com and biharboard.co. Students who appeared for the Intermediate Annual Examination can access the set-wise answer key (Set A to Set J) and verify their responses to the objective-type questions.
The PDF format makes it easy to download, save, and cross-check answers offline at your convenience. Candidates are advised to carefully select their respective question paper set while downloading the answer key to ensure accurate calculation of their estimated marks out of 70.
Bihar Board Class 12 Biology Answer Key 2026 PDF Download
How to Download Bihar Board Class 12 Biology Answer Key 2026?
Follow these simple steps to download the answer key:
Step 1: Visit the official website – www.biharboardonline.com or www.biharboard.co
Step 2: Click on the link titled “Bihar Board 12th Biology Answer Key 2026”
Step 3: Enter required details (if prompted)
Step 4: Select your question paper set (A–J)
Step 5: Download the PDF and save it for reference
How to Raise Objections Against Bihar Board Class 12 Biology Answer Key 2026?
If students find any discrepancy in the official answer key, they can raise objections through the online process. Here’s how:
- Log in using your code and serial number
- Select the subject (Biology)
- Choose the question number you want to challenge
- Submit the correct answer with valid proof (if required)
- Submit before March 6, 2026 (5 PM)
Bihar Board Class 12 Biology Exam Structure 2026
Understanding the Bihar Board Class 12 Biology Exam Structure 2026 is essential for students to calculate their estimated scores accurately after checking the answer key. The Biology theory paper follows a structured pattern with objective, short answer, and long answer questions. The total theory marks for the examination are 70 marks, and students must attempt a specific number of questions from each section.
Here is the detailed exam pattern:
| Section | Type of Questions | Total Questions | Questions to Attempt | Marks per Question | Total Marks |
|---|---|---|---|---|---|
| Section A | Objective (MCQs) | 70 | 35 | 1 mark | 35 |
| Section B | Short Answer | 20 | 10 | 2 marks | 20 |
| Section C | Long Answer | 6 | 3 | 5 marks | 15 |
| Total | — | — | — | — | 70 Marks |
How to Use Bihar Board Class 12 Biology Answer Key 2026?
The Bihar Board Class 12 Biology Answer Key 2026 helps students analyse their performance and estimate their probable marks before the final result is declared. However, it is important to use the answer key correctly to calculate your expected score accurately.
Follow the steps below to use the answer key effectively:
Step 1: Download the correct set of the Bihar Board Class 12 Biology Answer Key 2026 (Set A–J) from the official website.
Step 2: Match your 35 attempted objective (MCQ) answers with the answers given in the official key.
Step 3: Count 1 mark for every correct answer. There is no negative marking.
Step 4: Add your estimated marks for short answer questions (20 marks) and long answer questions (15 marks) based on your performance.
Step 5: Calculate your total estimated score out of 70 marks.
Step 6: If you find any incorrect answer in the key, raise an objection online within the given deadline.
Bihar Board Class 12 2026 Answer Sheet Evaluation
The BSEB conducted Class 12 exams from February 2 to February 13, 2026, in two shifts:
- Morning Shift: 9:30 AM to 12:45 PM
- Afternoon Shift: 1:45 PM to 5:00 PM
The evaluation process is being carried out from:
- February 27 to March 10, 2026
Frequently Asked Questions (FAQs)
Q1. When was the Bihar Board Class 12 Biology exam conducted in 2026?
Ans. The Bihar Board Class 12 Biology exam 2026 was conducted on February 2, 2026, as part of the Intermediate Annual Examination 2026.
Q2. When was the Bihar Board Class 12 Biology Answer Key 2026 released?
Ans. The Bihar Board Class 12 Biology Answer Key 2026 has. been released on March 1, 2026, on the official BSEB websites.
Q3. Where can I download the Bihar Board Class 12 Biology Answer Key 2026 PDF?
Ans. Students can download the Bihar Board Class 12 Biology Answer Key 2026 PDF from the official websites — biharboardonline.com and biharboard.co. The answer key is available set-wise (Set A to Set J).
Q4. How can I raise objections against the Bihar Board 12th Biology Answer Key 2026?
Ans. To raise objections against the Bihar Board 12th Biology Answer Key 2026, students must log in using their code and serial number on the official BSEB portal and submit challenges within the prescribed deadline.
Q5. What are the total marks for the Bihar Board Class 12 Biology exam 2026?
Ans. The total theory marks for the Bihar Board Class 12 Biology exam 2026 are 70 marks, including 35 marks for objective questions, 20 marks for short answer questions, and 15 marks for long answer questions.