Class 12 Biology Solved Question Papers: CBSE Class 12 Biology Question Paper 2020 Set 01
Review targeted exam resources with the CBSE Class 12 Biology Question Paper 2020 Set 01. Built according to official CBSE standards for the 2026-27 academic year, these downloadable Class 12 Biology question papers support effective revision and performance tracking.
Download Class 12 Biology Question Paper PDF
View or download the dedicated CBSE Class 12 Biology Question Paper 2020 Set 01 resource below. Engaging with these previous year papers under timed conditions ensures continuous academic progress and mastery of the 2026-27 exam format.
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
Free study material for Biology
Practice Exam Question Papers for Class 12 Biology CBSE Class 12 Biology Question Paper 2020 Set 01
Class 12 Biology Past Exam Papers & Resources
Access structured past examination sets for Class 12 Biology. Solving the CBSE Class 12 Biology Question Paper 2020 Set 01 provided above helps students understand actual exam difficulty levels, question formats, and topic distributions for both descriptive and objective sections.
Importance of Solving CBSE Class 12 Biology Question Paper 2020 Set 01
Practicing past question sets under timed home conditions helps refine pacing and time management skills, ensuring you complete your Biology examination comfortably within the official duration.
Complete Your Exam Preparation
Download digital copies of these papers for convenient offline revision anywhere. Cross-check your completed steps against our expert solution guides to ensure complete accuracy.
FAQs
The CBSE Class 12 Biology Question Paper 2020 Set 01 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 2020 Set 01 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 2020 Set 01 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 2020 Set 01 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 2020 Set 01, are provided free of charge in mobile-friendly PDF.