CBSE Class 12 Biology Question Paper 2022 Set A Solved

Biology
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Access and download CBSE Class 12 Biology Question Paper 2022 Set A Solved, 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 2022 Set A Solved to begin your self-assessment today.

Biology Class 12 Question Paper PDF with Solutions

SECTION A
 
1. Identify the two correct statements from the following
(i) Apiculture means apical meristem culture.
(ii) Spinach is iron –enriched.
(iii) Green revolution has resulted in improved pulse-yields
(iv) Aphids cannot infest rapeseed mustard.
 
2. Mention the role of Restriction Enzymes in Recombinant DNA technology. 
 
3. After a brief medical examination a healthy couple came to know that both of them are unable to produce functional gametes and should look for an „ART‟ (Assisted Reproductive Technique). Name the „ART‟ that you can suggest to them to help them bear a child.
 
4. What is Biopiracy? 
 
5. How many kinds of phenotypes would you expect in F2 generation in a monohybrid cross exhibiting co-dominance?
 
SECTION B
 
6. Explain the events that occur during fertilization of an ovum in humans. How is it that only one sperm enters the ovum?
 
7. Why is the possibility of human female suffering from hemophilia rare? Explain. 
 
8. What is the pathogenic property of baculovirus, used as biological agents? Name the genus of these organisms.
 
OR
 
Mycorrhizal association exists between fungi (Glomus sp) and roots of higher plants. How is this association beneficial to each member?
 
9. a) Why is small amount of curd added to milk?
b) What is the difference between fermentation of dough for making dosa and bread?
 
10 “Niche is a part of a habitat.” Explain with the help of an example. 
 
SECTION C
 
11. (a) Draw a diagram of Pistil showing pollen tube growth in angiosperm and label (i) Stigma; (ii) male gametes; (iii) micropyle and (iv) Ovule.
(b) Write the function of micropyle.
 
12. Differentiate between
(a) Xenogeny and Geitonogamy
(b) Oviparous and Viviparous organisms
(c) Pathogenesis and Parthenocarpy
 
13. According to the Darwinian theory, the rate of appearance of new forms is linked to their life cycles. Explain.
 
14. “DNA replication is semi-conservative”. Name the scientists who proposed it and who proved it. How was it proved experimentally? Explain.
 
15. “A population has been exhibiting genetic equilibrium”. 
Answer the following with regard to the above statement.
(i) Explain the above statement.
(ii) Name the underlying principle.
(iii) List any two factors which would upset the genetic equilibrium of the population.
(iv) Take up any one such factor and explain how the gene pool will change due to that factor
 
16. (a) Name the causative organisms for the following diseases:
(i) Elephantiasis (ii) Ringworm (iii) Amoebiasis
(b) How can public hygiene help control such diseases?
 
17. Microbes play a dual role when used for sewage treatment as they not only help to retrieve usable water but also generate fuel. Write in points how this happens?
 
18. What was the challenge for production of insulin using rDNA techniques? How did Eli Lilly produce insulin using rDNA technology?
 
19. (a) What is an “allergic reaction”?
(b) Name any two drugs used to quickly reduce the symptoms of allergy.
(c) Why do more and more children in metro cities of India suffer from allergies and asthma?
 
20. What are „cloning sites‟ in a cloning vector? Explain their role. Name any two such sites in pBR322.
 
OR
 
Name the host plant and that Meloidogyne incognitia infects. Explain the role of Agrobacterium in the production of ds-RNA in the host plant.
 
21. Why do lepidopterans die when they feed on Bt cotton plant? Explain how it happens. 3
 
22. Explain with the help of two examples how certain plants have evolved morphological and chemical defenses against primary consumers such as cows and goats.
 
SECTION D
 
23. A son persuades his father to replace his old mobile phone with the latest model launched in the market. He also shares the latest features it has and explains how it can be of a help to him in the modern technological world. Father is reluctant in buying a new one and tries to explain about its environmental impact. How do you think, the biologist father would try to convince his son? Justify the arguments of father and son both, by mentioning positive aspects of the behavior displayed by both of them in the situation concerned (three each).
 
SECTION E
 
24. (a) What are the benefits of choosing a dioecious plant species for plant breeding experiments?
(b) How would you proceed to cross-pollinate a monoecious flower?
(c) Draw a labelled schematic diagram of T.S. of an anther of an angiosperm.
 
OR
 
(a) Explain the hormonal regulation of spermatogenesis in humans.
(b) Draw the diagram of a human sperm. Label and write the functions of the components of its head.
 
25. State and explain the “law of independent assortment” in a typical Mendelian dihybrid cross.
 
OR
 
(a) How are the observations made during moth collection in pre- and post-industrialized era in England support evolution by Natural Selection?
(b) Explain the phenomenon that is well represented by Darwin‟s finches other than natural selection.
 
26. (a) Draw a simplified model of phosphorus cycling in a terrestrial ecosystem.
(b)Write the importance of such cycles in ecosystems.
 
OR
 
(a) Explain the narrowly utilitarian, broadly utilitarian and ethical arguments in favor of conservation of biodiversity.
(b) How is designation of certain areas as hotspots a step towards biodiversity conservation? Name any two hotspots in India.


Please click on below link to downloadCBSE Class 12 Biology Question Paper 2022 Set A Solved

2024
CBSE Class 12 Biology Question Paper 2024 Solved
2023
CBSE Class 12 Biology Question Paper 2023 Solved
2022
CBSE Class 12 Biology Question Paper 2022 Set A Solved
CBSE Class 12 Biology Question Paper 2022 Set B Solved
CBSE Class 12 Biology Question Paper 2022 Set C Solved
CBSE Class 12 Biology Question Paper 2022 Set D
2021
CBSE Class 12 Biology Question Paper 2021 Set A Solved
CBSE Class 12 Biology Question Paper 2021 Set B Solved
CBSE Class 12 Biology Question Paper 2021 Set C Solved
CBSE Class 12 Biology Question Paper 2021 Set D Solved
2020
CBSE Class 12 Biology Boards 2020 Question Paper Solved Set A
CBSE Class 12 Biology Boards 2020 Question Paper Solved Set B
CBSE Class 12 Biology Boards 2020 Question Paper Solved Set C
CBSE Class 12 Biology Boards 2020 Question Paper Solved Set D
CBSE Class 12 Biology Boards 2020 Question Paper Solved Set E
CBSE Class 12 Biology Compartment Question Paper Solved 2020 Set A
CBSE Class 12 Biology Compartment Question Paper Solved 2020 Set B
CBSE Class 12 Biology Question Paper 2020 Set A
CBSE Class 12 Biology Question Paper 2020 Set B
CBSE Class 12 Biology Question Paper 2020 Set C Solved
CBSE Class 12 Biology Question Paper 2020 Set D Solved
2019
CBSE Class 12 Biology For Blind Question Paper Solved 2019
CBSE Class 12 Biology Question Paper 2019 Set A
CBSE Class 12 Biology Question Paper 2019 Set D
CBSE Class 12 Biology Question Paper 2019 Set E
CBSE Class 12 Biology Question Paper 2019 Set F
CBSE Class 12 Biology Question Paper 2019 Set H
CBSE Class 12 Biology Question Paper 2019 Set I
CBSE Class 12 Biology Question Paper 2019 Set K
CBSE Class 12 Biology Question Paper 2019 Set L
CBSE Class 12 Biology Question Paper 2019 Set N
CBSE Class 12 Biology Question Paper Solved 2019 Set B
CBSE Class 12 Biology Question Paper Solved 2019 Set C
CBSE Class 12 Biology Question Paper Solved 2019 Set G
CBSE Class 12 Biology Question Paper Solved 2019 Set J
CBSE Class 12 Biology Question Paper Solved 2019 Set M
2018
CBSE Class 12 Biology Board Question Paper Solved 2018 Set 1
CBSE Class 12 Biology Board Question Paper Solved 2018 Set 2
CBSE Class 12 Biology Board Question Paper Solved 2018 Set 3
CBSE Class 12 Biology Compartment Question Paper Solved 2018 Set 1
CBSE Class 12 Biology Compartment Question Paper Solved 2018 Set 2
CBSE Class 12 Biology Compartment Question Paper Solved 2018 Set 3
2017
CBSE Class 12 Biology Question Paper All India with Answers 2017 (1)
CBSE Class 12 Biology Question Paper All India with Answers 2017 (2)
CBSE Class 12 Biology Question Paper All India with Answers 2017 (3)
CBSE Class 12 Biology Question Paper Delhi with Answers 2017 (1)
CBSE Class 12 Biology Question Paper Delhi with Answers 2017 (3)
CBSE Class 12 Biology Question Paper Foreign with Answers 2017 (1)
CBSE Class 12 Biology Question Paper Foreign with Answers 2017 (2)
CBSE Class 12 Biology Question Paper Foreign with Answers 2017 (3)
2016
CBSE Class 12 Biology Question Paper 2016 Set 1
CBSE Class 12 Biology Question Paper 2016 Set 1 Delhi
CBSE Class 12 Biology Question Paper 2016 Set 1 Foreign
CBSE Class 12 Biology Question Paper 2016 Set 2
CBSE Class 12 Biology Question Paper 2016 Set 2 Delhi
CBSE Class 12 Biology Question Paper 2016 Set 2 Foreign
CBSE Class 12 Biology Question Paper 2016 Set 3
CBSE Class 12 Biology Question Paper 2016 Set 3 Delhi
CBSE Class 12 Biology Question Paper 2016 Set 3 Foreign
2015
CBSE Class 12 Biology Question Paper 2015 (Delhi Set 1) with Answers (Compartment)
CBSE Class 12 Biology Question Paper 2015 (Delhi Set 2) with Answers (Compartment)
CBSE Class 12 Biology Question Paper 2015 (Delhi Set 3) with Answers (Compartment)
CBSE Class 12 Biology Question Paper 2015 (Outside Delhi Set 1) with Answers (Compartment)
CBSE Class 12 Biology Question Paper 2015 (Outside Delhi Set 2) with Answers (Compartment)
CBSE Class 12 Biology Question Paper 2015 (Outside Delhi Set 3) with Answers (Compartment)
CBSE Class 12 Biology Question Paper 2015 Delhi Set 1 with Answers (Reval)
CBSE Class 12 Biology Question Paper 2015 Delhi Set 2 with Answers (Reval)
CBSE Class 12 Biology Question Paper 2015 Delhi Set 3 with Answers (Reval)
CBSE Class 12 Biology Question Paper 2015 Foreign Set 1 with Answers (Reval)
CBSE Class 12 Biology Question Paper 2015 Foreign Set 2 with Answers (Reval)
CBSE Class 12 Biology Question Paper 2015 Foreign Set 3 with Answers (Reval)
CBSE Class 12 Biology Question Paper 2015 Outside Delhi Set 1 with Answers (Reval)
CBSE Class 12 Biology Question Paper 2015 Outside Delhi Set 2 with Answers (Reval)
CBSE Class 12 Biology Question Paper 2015 Outside Delhi Set 3 with Answers (Reval)
2014
CBSE Class 12 Biology Question Paper 2014 Set 1 - Delhi
CBSE Class 12 Biology Question Paper 2014 Set 1 - Foreign
CBSE Class 12 Biology Question Paper 2014 Set 1 - Outside Delhi
CBSE Class 12 Biology Question Paper 2014 Set 2 - Delhi
CBSE Class 12 Biology Question Paper 2014 Set 2 - Foreign
CBSE Class 12 Biology Question Paper 2014 Set 2 - Outside Delhi
CBSE Class 12 Biology Question Paper 2014 Set 3 - Delhi
CBSE Class 12 Biology Question Paper 2014 Set 3 - Foreign
CBSE Class 12 Biology Question Paper 2014 Set 3 - Outside Delhi
CBSE Class 12 Biology Question Paper SA1 2014
CBSE Class 12 Biology Question Paper SA2 2014 (1)
CBSE Class 12 Biology Question Paper SA2 2014 (2)
CBSE Class 12 Biology Question Paper SA2 2014 (3)
2013
CBSE Class 12 Biology Question Paper 2013 (1)
CBSE Class 12 Biology Question Paper 2013 (2)
CBSE Class 12 Biology Question paper 2013 (3)
CBSE Class 12 Biology Question Paper 2013 (4)
CBSE Class 12 Biology Question Paper SA1 2013
CBSE Class 12 Biology Question Paper SA2 2013
CBSE Class 12 Biology Question Papers Delhi 2013 (1)
CBSE Class 12 Biology Question Papers Delhi 2013 (2)
CBSE Class 12 Biology Question Papers Delhi 2013 (3)
CBSE Class 12 Biology Question Papers Delhi 2013 (4)
CBSE Class 12 Biology Question Papers Foriegn 2013 (1)
CBSE Class 12 Biology Question Papers Foriegn 2013 (2)
CBSE Class 12 Biology Question Papers Outside Delhi 2013 (1)
CBSE Class 12 Biology Question Papers Outside Delhi 2013 (2)
CBSE Class 12 Biology Question Papers Outside Delhi 2013 (3)
CBSE Class 12 Biology Sample Papers 2013 (16)
2012
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)
2011
CBSE Class 12 Biology Question Papers SA1 2011 (1)
CBSE Class 12 Biology Question Papers SA1 2011 (2)
2010
CBSE Class 12 Biology Question Papers SA1 2010 (1)
2009
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)
2008
CBSE Class 12 Biology Question Paper 2008 (1)
CBSE Class 12 Biology Question Paper 2008 (2)
CBSE Class 12 Biology Question Paper 2008 (3)
CBSE Class 12 Biology Question Paper 2008 (4)
CBSE Class 12 Biology Question Paper 2008 (5)
CBSE Class 12 Biology Question Paper 2008 (6)
CBSE Class 12 Biology Question Paper 2008 (7)
CBSE Class 12 Biology Question Paper 2008 Answers
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2007
CBSE Class 12 Biology Question Paper 2007 (1)
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CBSE Class 12 Biology Question Paper 2007 (3)
2006
CBSE Class 12 Biology Question Paper 2006 (1)
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CBSE Class 12 Biology Question Paper 2006 (3)
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CBSE Class XII Biology Question Paper 1
CBSE Class XII Biology Question Paper 1 (For Blind Candidates)
CBSE Class XII Biology Question Paper 2
CBSE Class XII Biology Question Paper 3
CBSE Class XII Biotechnology Question Paper 1

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CBSE Class 12 Biology Question Paper 2022 Set A Solved

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 2022 Set A Solved 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.

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Regularly practicing CBSE Class 12 Biology Question Paper 2022 Set A Solved 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.

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