Access and download CBSE Class 12 Biology Question Paper 2020 Set A, 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 2020 Set A to begin your self-assessment today.
Biology Class 12 Question Paper PDF with Solutions
CBSE Class 12 Biology Question Paper 2020 Set A. 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 The amino acid Serine has 6 m R.N.A codons-UCU UCC UCA UCG AGU AGC.
Give the D.N.A. codons for it.
2. Which disorder is caused in humans by the presence of an extra 21stautosome?
3. How many cells are found in a typical embryosac? Name them.
4. Name the two types of cloning vectors.
5. Why is thermostable D.N.A. polymerase needed in amplification (Genetic Engineering)?
SECTION – B
6. Draw a labelled diagram of any one of the following :-
Human Sperm
(OR)
Male gametophyte of angiosperms.
7. How does a test cross help in identifying the genotype of an organism? Explain.
8. What is the role of lysing enzymes in Biotechnology?
9. How does BOD indicate the level of pollution of water?
10. What is meant by Biotic potential?
SECTION – C
11. a) How do copper and hormone releasing IUD’S act as contraceptives?
b) What do you mean by seasonal breeders?
12. i) Some organisms like honey bees are called parthenogenic animals. GIVE Reason.
ii) Zygote forms the major link between one generation and those of the next generation organism- What is the fate of the zygote in organism which show:-
a) Haplontic life cycle.
b) Diplontic life cycle.
Please click the link below to download pdf file of CBSE Class 12 Biology Question Paper 2020 Set A
| 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 2020 Set A
We hope you liked the above provided CBSE Class 12 Biology Question Paper 2020 Set A. To get an understanding of the type of questions which were asked in previous year exams, it is important for Class 12 students to refer to CBSE Class 12 Biology Question Paper 2020 Set A that we have provided above. Students can download all the Question Papers for Class 12 Biology which were issued in the exams so that you can practise them and solve all types of questions which have been asked till now. By doing all CBSE Class 12 Biology Question Paper 2020 Set A PYP (previous year papers) you will understand the regular questions and MCQ questions for Class 12 Biology which are always asked and learn them so that you can get full marks in those questions. You can download CBSE Class 12 Biology Previous Year Question Papers and Class 12 Biology Sample Papers in PDF. You should attempt all the last year question paper for Class 12 and Class 12 Biology MCQ Test in examination conditions at home and then compare their answers with the solutions provided by our teachers.
Importance of solving CBSE Class 12 Biology Question Paper 2020 Set A
By regularly practicing CBSE Class 12 Biology Question Paper 2020 Set A students will be able to improve marks in Class 12 Biology exams. These question papers provide a very clear idea about the exam and paper structure, marking scheme, and frequently asked questions by teachers. By solving CBSE Class 12 Biology Question Paper 2020 Set A, students can improve their time management skills and also learn to answer Biology questions correctly within the Class 12 exam duration. Apart from learning concepts and solving the CBSE Class 12 Biology Question Paper will help you to boost your practical experience and also build confidence to face the actual examination.
Benefits of downloading CBSE Class 12 Biology Question Papers in PDF
Downloading the CBSE Class 12 Biology Question Paper 2020 Set A in PDF format will help you to read these papers anytime and anywhere. These question papers with answers act as a reliable tool to revise key concepts, practice numerical problems, and understand the correct approach to answer each question. By attempting the CBSE Class 12 Biology Question Paper 2020 Set A, you can assess your preparation level and identify weak areas on which you have to focus upon. Along with these question papers our teachers say that you should solve Sample Papers for Class 12 Biology to improve overall preparation.
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