The Board conducted the CBSE Class 12 Biology board exam from 10:30 a.m. to 1:30 p.m. Several online educational platforms released the unofficial CBSE 12th Biology exam answer key PDF. Students who would like to calculate their scores and get an initial assessment of their performance should make use of this CBSE 12th Bio paper answer key PDF.
Class 12 board examinations will end on April 9, 2026, which will cover all subjects across Science, Commerce, and Humanities streams.
It should be noted that CBSE does not publish official CBSE 12th answer key on its official website, cbse.gov.in. Students have to rely upon unofficial sources such as, Educational YouTube channels, various coaching institutes websites to download the CBSE Class 12 Biology answer key.
In this article, students can find the direct download link to CBSE Class 12 Biology answer key 2025 PDF which is to be added based on its availability soon after the conclusion of exam. Students can also check the CBSE 12 Biology Question Paper here.
In the following table, we have mentioned details of the CBSE 12th bio exam highlights related to its answer key release date and time. The direct links to download the CBSE 12th biology answer key have also been placed and have been activated.
Questions no. | Answer key |
1- | D |
2- | D |
3- | B |
4- | B |
5- | D |
6- | B |
7- | D |
8- | C |
9- | B |
10- | B |
11- | D |
12- | A |
13- | A |
14- | C |
15- | A |
16- | C |
Particulars | Date and Details |
CBSE 12th Biology exam date | March 25, 2025 (10:30 a.m. to 1:30 p.m.) |
CBSE Class 12 Biology answer key release date | After completion of the exam |
CBSE 12th Biology answer key PDF for Set 1 | PDF link to be updated soon |
CBSE Class 12 Biology answer key link for Set 2 | |
CBSE Class 12 Biology answer key link for Set 3 |
Having knowledge of the CBSE 12th marks allocation and marking scheme for the CBSE 12th board exam of Biology helps calculate the scores. Students must first download the CBSE Class 12 Biology answer key 2025 PDF and assign themselves marks as per the paper pattern and marking scheme mentioned in the table below:
Type of Questions | No. of Questions | Marks |
1 Mark | 16 | 16 |
2 Marks | 5 | 10 |
3 Marks | 7 | 21 |
4 Marks | 2 | 8 |
5 Marks | 3 | 15 |
Total | 33 | 70 |
Frequently Asked Questions (FAQs)
The Biology exam answer key for the CBSE 12th exam is prepared by various subject experts and educators. Hence, the chances of errors are minimal. However, students must wait for the CBSE 12th results 2025 to accurately determine their scores.
No, there is no negative marking.
The CBSE 12th Bio exam will conclude on March 25, 2025, at 1:30 p.m. Students can expect the answer key to be available around 3 p.m. onwards. Various educational portals may release answer keys for all sets even sooner. The direct link to the answer key will be provided in the article above as soon as it is available.
On Question asked by student community
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