CBSE Class 12 Biology Question Paper with Solution (2024-2015): Download PDF

Ans. CBSE marking scheme for Class 12 Biology question paper is subject to change year-to-year. However, based on the latest available information from the 2023-24 academic year, here's a general breakdown of the marking scheme:

• Section A: This section typically consists of 16 Multiple Choice Questions (MCQs), each carrying 1 mark.
• Section B: This section usually comprises 9 Short Answer type questions, carrying 2 marks each.
• Section C: This section generally includes 5 Short Answer type questions, carrying 3 marks each.
• Section D: This section usually has 4 Case-based/Source-based/Passage-based/ Integrated Assessment type questions, carrying 2 marks each.
• Section E: This section typically consists of 5 Long Answer type questions, carrying 3 marks each.

You can check CBSE Class 12th Exam Pattern to know the marking scheme in detail.

Ans. While there is no such recommended time allocation for each section, here is a suggested approach based on the typical question types and their weightage in CBSE Class 12 Biology question paper:

Total Time: 3 hours to attempt 33 questions

Section-wise Time Allocation:

• Section A (MCQs): 15% of total time (approximately 27 minutes) - Focus on accuracy and speed as these questions test your recall of basic concepts.
• Section B (Short Answer - 2 marks): 20% of total time (approximately 36 minutes) - Ensure you answer concisely and cover all the essential points.
• Section C (Short Answer - 3 marks): 25% of total time (approximately 45 minutes) - Provide more elaborated answers with diagrams or explanations where applicable.
• Section D (Case-based/Source-based/Passage-based/Integrated Assessment): 15% of total time (approximately 27 minutes) - Carefully analyze the case/source/passage and answer the questions thoughtfully.

Planning and Flexibility:

• This is a suggested guideline, and you can adjust the time allocation based on your strengths and weaknesses. For instance, if you're comfortable with MCQs, you might spend less time on Section A and dedicate more time to sections you find more challenging.
• Remember to leave sufficient time (around 10-15 minutes) at the end to review your answers and address any omissions or corrections.

Remember, the key is to strategize effectively and practice to ensure you attempt all sections confidently within the given time frame.

Ans. In the CBSE Class 12 Biology paper, the unit with the highest weightage is Genetics and Evolution, carrying 20 marks out of the total 70 marks in the theory paper. This unit comprises three chapters:

1. Principles of Inheritance and Variation
2. Molecular Basis of Inheritance
3. Evolution

Following this, the next unit with a significant weightage is Reproduction, carrying 16 marks. This unit includes two chapters:

1. Sexual Reproduction in Flowering Plants
2. Human Reproduction

Here's a breakdown of the weightage for all units in the CBSE Class 12 Biology paper (theory):

• Unit I: The Living World (8 marks)
• Unit II: Biological Classification (8 marks)
• Unit III: Plant Kingdom (11 marks)
• Unit IV: Animal Kingdom (12 marks)
• Unit V: Genetics and Evolution (20 marks)
• Unit VI: Reproduction (16 marks)
• Unit VII: Ecology and Environment (6 marks)

It is important to note that while these figures represent the official unit-wise weightage, the chapter-wise weightage within each unit might not be uniformly distributed. However, focusing on the high-weightage units and understanding the core concepts within them can significantly strengthen your preparation for CBSE Class 12 Biology exam. Check CBSE Class 12 Biology Syllabus

Ans. You can find previous years' CBSE Class 12th Biology question papers on the official CBSE Website, cbse.gov.in archives previous years' question papers for all subjects, including Biology. CBSE Class 12 Biology question papers with answer pdf have also been provided by Collegedunia in the article above. Additionally, several publishers release compilation books of previous years' question papers with solutions for Biology.

Ans. No, there is no negative marking for incorrect answers in the MCQs section of CBSE Class 12 Biology Question Paper. While negative marking is prevalent in many competitive exams like NEET, the CBSE Class 12 board exams adhere to a different marking scheme.

Therefore, you can attempt all the MCQs in the Biology paper without penalty for an incorrect answer.