CBSE Class 12 Biology Question Paper 2022 Set B Solved

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

Biology Class 12 Question Paper PDF with Solutions

SECTION - A
 
1. Which theory does explain the origin of universe?
 
OR
 
ame the phenomenon explained by Australian marsupials and placental mammals in evolution.
 
2. Give the scientific name of the source organism from which the first antibiotic was produced. 
 
3. Write the function of a Bioreactor. 
 
4. Very small animals are rarely found in polar regions. Give two reasons. 
 
5. What is stratification in an ecosystem?
 
OR
 
Define Standing Crop
 
SECTION - B
 
6. Fed up of a large family, a couple wanted to adopt a terminal method of contraception Describe the process conducted by the doctor in either of the cases (male / female partner)
 
OR
 
A mother of a one year old daughter wanted to space her second child Her doctor suggested CuT Explain its contraceptive actions.
 
7. State the Mendelian principle which can be derived from a dihybrid cross and not from monohybrid cross.
 
8. A farmer while working on his farm was bitten by a poisonous snake. The workers in the farm immediately rushed him to the nearby health centre. The doctor right away gave him an injection to save his life. What did the doctor inject and why?
 
9. Explain the role played by predators in a community.
 
OR
 
Given below is a graph depicting organismic response to changing external conditions. According to their response the organisms are grouped into two types. Name the type which will show (i) pattern
A and (ii) pattern B
CBSE Class 12 Biology Question Paper 2022 Set B Solved 1
 
10. Describe the effects of human activities in influencing natural ecosystem cycles with special reference to carbon cycle.
 
11. Explain with the help of two examples how certain plants have evolved morphological and chemical defenses against primary consumers such as cows and goats.
 
12. Compare the grazing food chain and detritus food chain in the aspect of their (a) origin and (b) energy status.

SECTION - C
 
13. State three reasons for increase in number of people in reproducible age in India. 
 
14. Study the given pedigree chart and answer the questions that follow:
CBSE Class 12 Biology Question Paper 2022 Set B Solved 2
(a) Is the trait recessive or dominant?
(b) Is the trait sex-linked or autosomal?
(c) Give the genotypes of the parents shown in generation I and their third child shown in generation
 
II and the first grandchild shown in generation III.
 
OR
 
How are dominance, codominance and incomplete dominance patterns of inheritance different from each other?
 
15. Explain the mechanism of „sex determination‟ in birds. How does it differ from that of human beings?
 
16. (a) Expand VNTR and describe its role in DNA fingerprinting.
(b) List any two applications of DNA fingerprinting technique.
 
OR
 
Name the three RNA polymerases found in eukaryotic cells and mention their functions.
 
17. State in what ways Stanley Miller simulated the conditions of :
(i) Primitive atmosphere on earth.
(ii) Energy source at the time of origin of life, and
(iii) Formation of organic molecules of life to prove the theory of chemical evolution.
 
18. How can crop varieties be made disease resistant to overcome food crisis in India ? Explain. Name one disease resistant variety in India of:
(a) Wheat to leaf and stripe rust
(b) Brassica to white rust
 
OR
 
Explain out-breeding, out-crossing and cross-breeding practices in animal husbandry.
 
19. A 17-year old boy is suffering from high fever with profuse sweating and chills. Choose the correct option from the following diseases which explains these symptoms and rule out the rest with adequate reasons.
(a) Typhoid (b) Viral Fever(c) Malaria
 
20. What is biofortification ? Mention the contribution of Indian Agricultural Research Institute towards it with the help of any two examples.
 
21. An interesting property of restriction enzymes is molecular cutting and pasting. Restriction enzymes typically recognize a symmetrical sequence of DNA.
CBSE Class 12 Biology Question Paper 2022 Set B Solved 3
 
Notice that the top strand is the same as the bottom strand, but reads backward. When the enzyme cuts the strand between G and A, it leaves overhanging chains:
CBSE Class 12 Biology Question Paper 2022 Set B Solved 4
A. What is this symmetrical sequence of DNA known as?
B. What is the significance of thsese overhanging chains?
C. Name the restriction enzyme that cuts the strand between G and A
 
22. Explain three steps involved in polymerase chain reaction. 
 
23. What are “flocs”? State their role in effluent treatment and their ultimate fate in sewage treatment tank.
 
24. How has the use of Agrobacterium as vectors helped in controlling Meloidegyne incognitia, infestation in tobacco plants? Explain in correct sequence.
 
SECTION - D
 
25. (a) Why does DNA replication occur in small replication forks and not in its entire length?
(b) Why is DNA replication continuous and discontinuous in a replication fork?
(c) State the importance of origin of replication in a replication fork.
 
OR
 
(a) Write the scientific name of the organism Thomas Hunt Morgan and his colleagues worked with for their experiments. Explain the correlation between linkage and recombination with respect to genes as studied by them.
(b) How did Sturtevant explain gene mapping while working with Morgan ?
 
26. (a) Name the technology that has helped the scientists to propagate on large scale the desired crops in short duration. List the steps carried out to propagate the crops by the said technique.
(b) How are somatic hybrids obtained?
 
OR
 
i) The three microbes are listed below. Name the product produced by each one of them and mention their use.
(a) Aspergillus niger
(b) Trichoderma polysporum
(c) Monascus purpureus
ii) How is „Roquefort cheese‟ ripened? How is it different from the other variety?
 
27. (a) Following are the responses of different animals to various abiotic factors. Describe each one with the help of an example.
(i) Regulate
(ii) Conform
(iii) Migrate
(iv) Suspend
(b) If 8 individuals in a population of 80 butterflies die in a week, calculate the death rate of population of butterflies during that period.
 
OR
 
With a flow chart explain the process of decomposition .What factors affect this process?


Please click on below link to downloadCBSE Class 12 Biology Question Paper 2022 Set B 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
CBSE Class 12 Biology Question Paper 2008 Answers(2)
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)
CBSE Class 12 Biology Question Paper 2006 (2)
CBSE Class 12 Biology Question Paper 2006 (3)
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CBSE Class XII Biology Question Paper 1
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CBSE Class XII Biology Question Paper 2
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CBSE Class XII Biotechnology Question Paper 1

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CBSE Class 12 Biology Question Paper 2022 Set B 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 B 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 B 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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Having the CBSE Class 12 Biology Question Paper 2022 Set B Solved 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.

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How does solving CBSE Class 12 Biology Question Paper 2022 Set B Solved help in preparing for the 2026 exams?

Solving previous year papers like CBSE Class 12 Biology Question Paper 2022 Set B Solved is important to understand repeat themes and question difficulty levels of Biology. It helps Class 12 students to test their time management skills too.

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