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CBSE Class 12 Board Exam 2023 Post Paper Analysis - Biology (16th March)

The Central Board of Secondary Education (CBSE) conducted the Biology exam for students of Class 12 today, 16th March 2023, following a good gap of 5 days after the Major Mathematics paper. So students got sufficient time to prepare for the Biology paper. It was very much needed as there were a couple of changes in the question paper pattern this year. It's important to note that Biology is considered one of the crucial subjects for students planning to appear for NEET. 

CBSE Class 12 Biology Paper 2023 is over, and the students had varying reactions to the paper. Some found it difficult, while others barely felt any challenge. The questions were primarily straightforward, and there was nothing too tricky except for a few questions. Overall, the Biology paper was of moderate difficulty level. 

Question Paper Pattern

For this academic year, 2022-23, CBSE followed the rationalized syllabus released on its official website. After the term-wise pattern adopted during COVID, CBSE returned to its old paper pattern for this academic year. However, the typology of questions and the internal choices within the paper were significant areas of change. So, let's first see the paper structure before moving on to paper analysis. 

The CBSE Class 12 Biology paper was 70 marks, and the time allotted for the exam was 3 hours. The question paper comprised 33 questions distributed over five sections A, B, C, D and E. All questions were compulsory. 


Question Numbers

Question Type

Marks Allotted

Section A

1 to 12


1 mark each

13 to 16


1 mark each

Section B

17 to 21

Very Short Answer Type

2 marks each

Section C

22 to 28

Short Answer Type

3 marks each

Section D

29 and 30


4 marks each

Section E

31 to 33

Long Answer Type

5 marks each

There was no overall choice in the question paper. However, internal choices were provided in one question of two marks, one question of three marks, and all questions of five marks. Students were expected to attempt only one of the alternatives in such questions.

Here we decode the CBSE 12 Biology 2023 Board paper Series EF1GH/3-Code 57/1/3-Set 3. 

Question Paper Analysis



Overall difficulty level

Easy to Moderate

Section A (MCQs)


Section A (Assertion-Reasoning)


Section B (Very Short Answer Type)


Section C (Short Answer Type)


Section D (Case-based)


Section E (Long Answer Type)

Easy to Moderate

Was the paper lengthy


Overall expected good score


Chapter-wise Distribution of Marks

The chapter ‘Human Health and Disease’ was the most-valued chapter carrying 13 marks, followed by the chapters ‘Sexual Reproduction in Flowering Plants’ and ‘Evolution’ with a weightage of 11 marks and 10 marks, respectively. 

Listed below are student and teacher responses from every aspect of the paper concerning typology, distribution of marks and, of course, difficulty level. 

Students’ Feedback

  • The paper was easy to moderate.
  • There were many direct NCERT questions which made the exam easy.
  • The three-mark questions from Section C were difficult.
  • The case study-based questions from Section D was tricky.
  • The application-based questions were complex.
  • Overall, the paper was balanced and provided a great scoring opportunity. 

Teachers’ Feedback

  • Section A, consisting of MCQs and assertion-reason-based questions, was the exam's scoring and most straightforward part.
  • The questions from Section A were direct. However, the difficulty level increased from there.
  • The long-answer questions from Section E required out-of-the-box thinking and drawing figures.
  • The paper was entirely from the syllabus, so the exam was easy and balanced.
  • The final paper resembled the specimen question paper released by CBSE.


The CBSE Class 12 Biology 2023 paper was easy to moderate and well-balanced, with many direct questions from the NCERT textbook. Most students should score around 50-60 on the 70 marks paper. Teachers felt that the paper was structured as per CBSE guidelines only. Still, the overall paper required technical thinking and application. Overall, it would be fair to conclude that the paper was good for scoring marks, and the students hope to get good marks in this examination. 

Team TopperLearning wishes you all the best for your upcoming papers. Stay tuned for exam reviews and updates.

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