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Exam Special

CBSE Class 12 Biology 2018 Exam Review and Analysis

Was CBSE XII Biology tough? Read the special review to know more about the paper.

By Admin 27th Mar, 2018 05:22 pm

The Central Board of Secondary Education (CBSE) conducted the AISSCE Biology exam for students of Class 12 today, 27th March, after a long gap of 6 days of the Mathematics paper. So students got enough time to revise for their Biology paper. Biology is considered one of the crucial subjects for students who are planning to appear for NEET.

In the CBSE Class 12 Biology paper, the marking pattern and the corresponding questions were not related to each other. Few questions which seemed to be important and even expected did not appear in the paper. Questions were mostly from the NCERT syllabus, and the question paper contained about two-three application-based questions.

Here we decode the CBSE Class 12 Biology Paper for 2018. Let’s compare the chapter-wise distribution of this year’s paper with that of the previous year.

The chapter ‘Organisms and Populations’ was the most-valued chapter carrying 12 marks compared to last year’s chapter ‘Molecular Basis of Inheritance’ which carried 15 marks. It was followed by the chapters ‘Molecular Basis of Inheritance‘ and ‘Sexual Reproduction in Flowering Plants’ with a weightage of 11 marks and 10 marks, respectively.

The chapter ‘Environmental Issues’ was a mild shock this time as it carried questions of 9 marks. In addition to the value-based question of 4 marks, it carried another question of 5 marks. These questions usually come from the chapter ‘Reproductive Health’ as was observed from an analysis of papers of the past five years.

Students with thorough knowledge on ‘Sexual Reproduction in Flowering Plants’ and ‘Human Health and Disease’ would find that answering these questions in the paper was relatively easy.

General Observations

We’ve noted some observations from every aspect of the paper with respect to typology, distribution of marks, difficulty level and, of course, the most scoring areas.

  • Distribution of marks corresponding to the 3 marks and 5 marks questions was a bit varied.
  • There were mixed questions of direct and indirect; these were related to the concept.
  • Application-based and HOTS questions were at the finishing line of the competition.
  • Approximately 12 marks went straight into the answer bucket without any thought as four to five questions were remembering based.
  • The value-based question was also very easy as it needed no concept to remember and was thus a scoring question.

Section-wise Analysis

  • Section A was relatively easy as the questions were direct.
  • Section B was slightly moderate and needed some thinking such as the questions ‘Explain the procedure for retention of characteristics in a hybrid tomato’ and ‘Although a prokaryotic cell has no defined nucleus…’.
  • Section C was a bit lengthy as most of the questions were directly concept based and remembering type.
  • Section D was the value-based question which was easy.
  • Section E was scoring, barring two questions from ‘Gene Mapping’ and ‘Transforming Principle’, both of which were tricky.

Click here for CBSE Class 12 Biology Previous Year Paper.


Overall, the CBSE Class 12 Biology paper was quite tricky and lengthy with many questions from the NCERT textbook.

It would be unfair to conclude that this paper was very easy, but yes, this paper gave a great scoring opportunity to students who were regular with their learning of concepts and had practised with sample papers.

Today’s CBSE Class 12 Biology paper was the last board paper for most students. With a little less stress that the board exams are over and out of the way, students are now focused on their preparation for NEET.

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