CBSE Class 12 Biology Answer Key 2025 - Download Solutions PDF Here (All Sets)

CBSE Class 12 Biology Answer Key 2025 - Download Solutions PDF Here (All Sets)

Manasvini GuptaUpdated on 25 Mar 2025, 05:14 PM IST
Switch toEnglish IconHindi Icon

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.

LiveCBSE 2026 Admit Card LIVE: CBSE Class 10, 12 hall ticket soon at cbse.gov.in; direct link, datesheet, updatesJan 25, 2026 | 7:23 PM IST

Candidates can check the CBSE class 10 marking scheme 2026 in the table below:

Subjects
Theory marks
Internal assessment
English
8020
Hindi
8020
Maths
8020
Science
8020
Social Science
8020
Read More
CBSE Class 12 Biology Answer Key 2025 - Download Solutions PDF Here (All Sets)
CBSE Class 12 Biology Answer Key 2025

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.

Download CBSE 12th Biology Exam Answer Key 2025 PDF

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.

CBSE Class 12 Biology SET-3 Section A Answer Key 2025

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

CBSE Board 12th Biology Answer Key 2025 PDF

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

Click Here

CBSE Class 12 Biology answer key link for Set 3

Click Here

Download CBSE 12th Answer Keys 2025 for Other Subjects Here

How to Calculate Scores Based on CBSE 12th Biology Exam Pattern 2025?

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:

CBSE 12th Biology Exam Paper Pattern and Marking Criteria 2025

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)

Q: How reliable is the unofficial CBSE 12th Biology answer key PDF 2025?
A:

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. 

Q: Is there any negative marking in the CBSE 12th Bio exam?
A:

No, there is no negative marking. 

Q: When can I expect the CBSE 12th Biology answer key to be available?
A:

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.

Articles
|
Upcoming School Exams
Ongoing Dates
Manipur board 12th Admit Card Date

17 Dec'25 - 20 Mar'26 (Online)

Ongoing Dates
Odisha CHSE Admit Card Date

19 Dec'25 - 25 Mar'26 (Online)

Certifications By Top Providers
Economic Evaluation for Health Technology Assessment
Via Postgraduate Institute of Medical Education and Research Chandigarh
Aspen Plus Simulation Software a Basic Course for Beginners
Via Indian Institute of Technology Guwahati
Yoga Practices 1
Via Swami Vivekananda Yoga Anusandhana Samsthana, Bangalore
Introduction to Biomedical Imaging
Via The University of Queensland, Brisbane
Brand Management
Via Indian Institute of Management Bangalore
Edx
 1071 courses
Coursera
 816 courses
Udemy
 394 courses
Futurelearn
 264 courses
Explore Top Universities Across Globe

Questions related to CBSE Class 12th

On Question asked by student community

Have a question related to CBSE Class 12th ?

Hello

You will be able to download the CBSE Previous Year Board Question Papers from our official website, careers360, by using the link given below.

https://school.careers360.com/boards/cbse/cbse-previous-year-question-papers

I hope this information helps you.

Thank you.

Hello

You will be able to download the CBSE Pre-Board Class 12 Question Paper 2025-26 from our official website by using the link which is given below.

https://school.careers360.com/boards/cbse/cbse-pre-board-class-12-question-paper-2025-26

I hope this information helps you.

Thank you.

Hello,

Yes, it's completely fine to skip this year's 12th board exams and give them next year as a reporter or private candidate, allowing you to prepare better; the process involves contacting your current school or board to register as a private candidate or for improvement exams during the specified

HELLO,

Yes i am giving you the link below through which you will be able to download the Class 12th Maths Book PDF

Here is the link :- https://school.careers360.com/ncert/ncert-book-for-class-12-maths

Hope this will help you!

Hello,

Here is your Final Date Sheet Class 12 CBSE Board 2026 . I am providing you the link. Kindly open and check it out.

https://school.careers360.com/boards/cbse/cbse-class-12-date-sheet-2026

I hope it will help you. For any further query please let me know.

Thank you.