Previous Year Question Papers for Class 12 Biology
Access comprehensive previous year question papers for Class 12 Biology using the CBSE Class 12 Biology Question Paper 2015 with Answers (Reval) Delhi Set 03. Designed to align with the 2026-27 CBSE academic guidelines, these solved papers help students assess their exam readiness and understand official marking schemes.
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Access the complete question paper PDF for Class 12 Biology below. Regular practice with these targeted exam papers builds familiarity with standard question patterns and helps secure higher marks in final evaluations.
CBSE Class 12 Biology Question Paper 2015 Delhi Set 3 with Answers (Reval). Students can download the last year question papers using the link below. Free download of examination question papers with solutions.Last 10 year question papers should be practised to get better marks in examinations.
SECTION – A
1. Name the transcriptionally active region of chromatin in a nucleus.
2. A geneticist interested in studying variations and patterns of inheritance in living beings prefers to choose organisms for experiments with shorter life cycle. Provide a reason.
3. What is Biopiracy ?
4. State a reason for the increased population of dark coloured moths coinciding with the loss of lichens (on tree barks) during industrialization period in England.
5. Indiscrimate diagnostic practices using X-rays etc., should be avoided. Give one reason.
SECTION – B
6. Differentiate between ‘ZZ’ and ‘XY’ type of sex-determination mechanisms.
7. An infertile couple is advised to adopt test-tube baby programme. Describe two principle procedures adopted for such technologies.
8. Many fresh water animals can not survive in marine environment. Explain.
OR
How are productivity, gross productivity, net primary productivity and secondary productivity interrelated ?
9. Enumerate four objectives for improving the nutritional quality of different crops for the health benefits of the human population by the process of “Biofortification”.
10.Mention a product of human welfare obtained with the help of each one of the following microbes :
(a) LAB
(b) Saccharomyces cerevisiae
(c) Propionibacterium sharmanii
(d) Aspergillus niger
Please click the link below to download pdf file of CBSE Class 12 Biology Question Paper 2015 Delhi Set 3 with Answers (Reval)
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Download CBSE Question Papers: Class 12 Biology
Previous Year Question Papers: Class 12 Biology
Access structured past examination sets for Class 12 Biology. Solving the CBSE Class 12 Biology Question Paper 2015 with Answers (Reval) Delhi Set 03 provided above helps students understand actual exam difficulty levels, question formats, and topic distributions for both descriptive and objective sections.
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FAQs
The CBSE Class 12 Biology Question Paper 2015 with Answers (Reval) Delhi Set 03 is available for download on StudiesToday.com. It includes complete set with all sections so that Class 12 students can practice with the exact same paper that came in the CBSE exams.
Yes, the solutions for CBSE Class 12 Biology Question Paper 2015 with Answers (Reval) Delhi Set 03 are prepared by subject matter experts as per official marking scheme. Class 12 students will understand the structure of answers and 'step-marks' methodology Biology.
Solving previous year papers like CBSE Class 12 Biology Question Paper 2015 with Answers (Reval) Delhi Set 03 is important to understand repeat themes and question difficulty levels of Biology. It helps Class 12 students to test their time management skills too.
Yes, where applicable, CBSE Class 12 Biology Question Paper 2015 with Answers (Reval) Delhi Set 03 is available in both English and Hindi mediums. All students from Class 12 can access Biology study material in their preferred language.
No, all previous year question papers on StudiesToday, including CBSE Class 12 Biology Question Paper 2015 with Answers (Reval) Delhi Set 03, are provided free of charge in mobile-friendly PDF.