Bihar Board 2026 Class 12th Biology Unofficial Answer Key: The Bihar School Examination Board (BSEB) has officially commenced the 2026 Intermediate Annual Examinations today, February 2, 2026. Approximately 13.18 lakh students began their Class 12 (Intermediate) exams at 1,762 centres across the state. As per the official schedule, the Bihar Board Class 12 Biology Examination 2026 was held today, from 9:30 AM to 12:45 PM. BSEB Class 12 Biology exam 2026 follows a 100-mark assessment structure, split between a 70-mark theory paper and a 30-mark practical exam. Students who appeared for the Bihar Board Class 12 Biology Theory Examination 2026 can check the Bihar Board 2026 Class 12th Biology Unofficial Answer Key available here.
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Students can check the BSEB 2026 Class 12th Biology Unofficial Answer Key available in the table below.
| Bihar Board 2026 Class 12th Biology Questions | Bihar Board 2026 Class 12th Biology Answers |
| Question 1: If a person's blood group is AB, what would be his/her genotype? | I^A I^B |
| Question 2: How many types of gametes would be formed if the genotype of plant is AaBbCc ? | Eight |
| Question 3: Which of the following is not a chromosomal disorder ? | Haemophilia |
| Question 4: In which of the following animals does sex determination depend on the number of chromosome sets? | Honeybees |
| Question 5: Which of the following laws are based on monohybrid cross? | both A and B |
Bihar Board 2026 Class 12th Biology: Question Paper Analysis
Students can access the Bihar Board 2026 Class 12th Biology Exam Analysis from the table below.
| Particulars | Details |
| Bihar Board 2026 Class 12th Biology Overall Difficulty Level | Easy to Moderate |
| Was the Paper Lengthy? | Yes |
| Number of Good Attempts | to be updated |
| Important Topics Asked | to be updated |
The Bihar Board 2026 Class 12th Biology Unofficial Answer Key is prepared by the subject-experts. Students are advised to use the above unofficial answer key to evaluate their performances. Unofficial answer keys are typically released by private coaching institutes and subject experts within a few hours of the exam's conclusion to help students estimate their scores.
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