CBSE Class 12 Biology Exam 2025: Question Paper Analysis & Answer Sheet
March 25, 2025
CBSE Class 12 Biology exam 2024-25: Detailed Question Paper Analysis
The CBSE Class 12 Biology exam for 2025 was held on March 25, 2025, from 10:30 AM to 1:30 PM. The paper had a total of 33 questions, divided into different sections based on marks and question types.
Question Paper Structure
The exam followed the usual CBSE pattern, with a total of 70 marks (excluding the practical component). Below is a detailed breakdown of the question format:
Section
No. of Questions
Marks per Question
Question Type
Section A
16
1 mark each
MCQs, Assertion-Reason Based
Section B
5
2 marks each
Short Answer Questions
Section C
7
3 marks each
Short Answer Questions
Section D
2
4 marks each
Case-Based Questions
Section E
3
5 marks each
Long Answer Questions
Student’s Reaction
Most students found the paper to be of moderate difficulty. While the questions were from the NCERT syllabus, some were tricky and required in-depth conceptual understanding.
Here are some key takeaways from student feedback:
Many students felt the paper was well-structured and manageable.
A few students found certain sections tough, particularly those requiring analytical and application-based thinking.
Time management played a crucial role, with some students struggling to complete the paper within the given timeframe.
Those who revised NCERT thoroughly found the paper easier to attempt, while others found some questions unexpectedly complex.
Difficulty Level Breakdown
The difficulty level varied across different sections of the paper:
Section
Question Type
Difficulty Level
Remarks
Section A
MCQs
Easy
A few assertion-reason-based questions required critical thinking.
Section B
Short Answer Questions (2 marks)
Moderate
Required detailed understanding of concepts.
Section C
Short Answer Questions (3 marks)
Moderate
Mix of direct and application-based questions.
Section D
Case-Based Questions
Moderate-Tricky
Required analytical skills and real-world application
While most students found the MCQs and case-based questions manageable, some long-answer questions were time-consuming and needed precise explanations to secure full marks.
How to Download the CBSE Class 12 Biology Question Paper
To download the CBSE Class 12 Biology question paper from the official website, follow these steps:
Visit the Official CBSE Website: Go to the CBSE academic website at cbseacademic.nic.in.
Navigate to Question Papers: Look for the section labeled "Question Papers" or "Previous Year Question Papers" on the homepage.
Select Class and Subject: Choose Class 12 and then select Biology from the list of subjects.
Download Links: You will find links to download question papers for various years. Click on the link for the desired year (e.g., 2025, 2024, etc.) to download the PDF.
Save the File: Once you click on the link, the question paper will open in PDF format. You can then save it to your device for future reference.
Ecology – Questions involving real-world applications and data interpretation were tricky.
Case-Based Questions – These required critical thinking and a strong grasp of concepts.
CBSE Passing Marks and Grading System
To pass the CBSE Class 12 Biology exam, students must score at least 33% marks in both the theory and practical exams. This means that for a 70-mark theory paper, a minimum of 23 marks is required to pass.
CBSE Grading System
CBSE follows a relative grading system based on students’ overall performance. The grading scale is as follows:
Marks Range
Grade
Grade Point
91-100
A1
10.0
81-90
A2
9.0
71-80
B1
8.0
61-70
B2
7.0
51-60
C1
6.0
41-50
C2
5.0
33-40
D
4.0
Below 33
E (Fail)
-
CBSE also considers internal assessments, practical exams, and project work when calculating final results.
Want to know more about CBSE's marking scheme and grading system? Click here to read our in-depth blog!
The 2025 Biology paper was easier compared to 2024. Here’s why:
2025 Exam – Well-balanced, direct NCERT-based questions, and students could finish on time.
2024 Exam – More difficult, had trickier questions, and required deeper analytical skills.
Many students felt confident after this year's exam as it tested understanding rather than memorization.
What Next?
If you’ve appeared for the exam, stay patient and wait for the official answer key.
Start preparing for upcoming competitive exams based on your results.
For younger students, this analysis can help plan a better study strategy for next year!
Need Help in Your Studies?
The CBSE Class 12 Biology exam in 2025 was fair and followed the standard format. Most students were able to attempt all questions within the given time. The focus on NCERT concepts helped those who had revised well.
Looking for expert guidance to improve your performance in board exams? Interval Learning offers one-on-one tuition and group study sessions for CBSE students from Class 1 to 12. Our experienced tutors help you master concepts with personalized learning plans and regular assessments.
The theory paper was for 70 marks, while practical exams added to the total score.
Yes, most questions were directly from NCERT, though some required deeper understanding and application.
Yes, students and teachers found the 2025 paper easier compared to 2024.
Many students found case-based and biotechnology questions a bit tricky.
You need at least 33% to pass.
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