Access and download CBSE Class 12 Biology Question Paper 2019 Set N, carefully designed as per the latest 2025-26 examination guidelines issued by CBSE, NCERT, and KVS. These Class 12 Biology previous year question papers include detailed solutions, helping students to assess their performance and identify and improve key areas before the final exams.
Solved Biology Question Papers for Class 12
Practicing these Class 12 Biology question papers is the best way to understand the actual exam pattern and marking scheme. By solving these papers under timed conditions, Class 12 students can improve their speed and accuracy. Download the full CBSE Class 12 Biology Question Paper 2019 Set N to begin your self-assessment today.
Biology Class 12 Question Paper PDF with Solutions
CBSE Class 12 Biology Question Paper 2019 Set N. Students can download the last year board exams 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 disorder in humans with the following karyotype :
(a) 22 pairs of autosomes + XO
(b) 22 pairs of autosomes + 21st chromosome + XY
2. How do lactic acid bacteria (LAB) initiate setting of milk into curd ?
3. The diploid number of chromosomes in an angiospermic plant is 16. What will be the number of chromosomes in its endosperm and antipodal cells ?
OR
State the reason why pollen grains lose their viability when the tapetum in the anther is malfunctioning.
4. What do ‘X’ and ‘Y’ represent in the transcription unit of the DNA molecule shown ?
5. Biotechnological techniques can help to diagnose the pathogen much before the symptoms of the disease appear in the patient. Suggest any two such techniques.
OR
Mention the form in which inactive protein toxin is produced by Bacillus thuringiensis. How does it get activated in the pest body to kill it ?
SECTION B
6. Write the scientific name of the tropical sugar cane variety of South India. Why was the need felt to cross it with the sugar cane variety of North India ?
7. (a) How will you measure population density of fish in a lake ? (b) In a pond there are 100 frogs. 20 more were born in a year.
Calculate the birth rate of this population.
OR
Draw a ‘‘stable’’ human age pyramid. Comment on the population growth rate that is depicted by it.
Please click the link below to download pdf file of CBSE Class 12 Biology Question Paper 2019 Set N.
| CBSE Class 12 Biology Question Paper 2012 (1) |
| CBSE Class 12 Biology Question paper 2012 (2) |
| CBSE Class 12 Biology Question paper 2012 (3) |
| CBSE Class 12 Biology Question paper 2012 (4) |
| CBSE Class 12 Biology Question Papers SA1 2011 (1) |
| CBSE Class 12 Biology Question Papers SA1 2011 (2) |
| CBSE Class 12 Biology Question Paper 2009 (1) |
| CBSE Class 12 Biology Question Paper 2009 (2) |
| CBSE Class 12 Biology Question Paper 2009 (3) |
| CBSE Class 12 Biology Question Paper 2009 (4) |
| CBSE Class 12 Biology Question Paper 2007 (1) |
| CBSE Class 12 Biology Question Paper 2007 (2) |
| CBSE Class 12 Biology Question Paper 2007 (3) |
Important Practice Resources for Class 12 Biology
CBSE Class 12 Biology Question Paper 2019 Set N
To understand the types of questions asked in past examinations, it is very important for Class 12 students to solve the CBSE Class 12 Biology Question Paper 2019 Set N provided above. You can easily download these past papers for Class 12 Biology in PDF format for the last 10 years. By practicing these actual exam questions you will gain an understanding of the difficulty level and the variety of topics covered over the years. By solving these Previous Year Papers (PYPs) you will understand both descriptive and MCQ questions in your final tests.
Importance of solving CBSE Class 12 Biology Question Paper 2019 Set N
Regularly practicing CBSE Class 12 Biology Question Paper 2019 Set N is the best way to improve your score in Class 12 Biology. These papers will give you details of the marking scheme and the paper structure used by the CBSE. By regularly attempting these under actual exam conditions at home, you can slowly improve your time management skills, which will help you to complete your Biology paper within the allowed duration.
Benefits of downloading CBSE Class 12 Question Papers
Having the CBSE Class 12 Biology Question Paper 2019 Set N in PDF format allows you to revise key concepts anywhere, even without an internet connection. These sets are a reliable tool to practice numerical problems and understand the correct approach to all types of answers. After solving the questions, you should compare your work with the solutions provided by our teachers. Along with these papers, students should always solve the Class 12 Biology Sample Papers and MCQ tests on studiestoday.com for a complete revision.
The CBSE Class 12 Biology Question Paper 2019 Set N 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 2019 Set N 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 2019 Set N 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 2019 Set N 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 2019 Set N, are provided free of charge in mobile-friendly PDF.