CBSE Class 12 Biology Question Paper 2022 Set A Solved

Read and download CBSE Class 12 Biology Question Paper 2022 Set A Solved designed as per the latest question paper pattern and Class 12 examination guidelines issued by CBSE, NCERT and KVS. The past year Question Papers for Class 12 Biology have been provided with solutions which will help students to assess their performance and find out topics in Biology Class 12 which they need to improve to get better marks in Class 12 exams. After solving these last year papers also refer to solved Sample Papers for Class 12 Biology available on our website to build strong understanding of the subject

Biology Question Paper Class 12

Students can refer to the below Class 12 Biology Question Paper designed to help students understand the pattern of questions that will be asked in Class 12 exams. Please download CBSE Class 12 Biology Question Paper 2022 Set A Solved

Biology Class 12 Question Paper

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

More Study Material

Previous Year Question Paper Biology Class 12

We hope you liked the above provided CBSE Class 12 Biology Question Paper 2022 Set A Solved. 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 2022 Set A Solved 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. If you do CBSE Class 12 Biology Question Paper 2022 Set A Solved for Class 12 Biology you will easily understand the way examination question papers are set by teachers.

Class 12 Biology Previous Year Question Papers

The past year question papers CBSE Class 12 Biology Question Paper 2022 Set A Solved covers all the topics which have been suggested by CBSE in their Class 12 Biology syllabus for the current year. By doing all CBSE Class 12 Biology Question Paper 2022 Set A Solved 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.

Class 12 Biology Model Question Paper Pdf Download

We have provided links above of CBSE Class 12 Biology Question Paper 2022 Set A Solved in Pdf format so that you can just click the links and easily download the papers with answers. On studiestoday, we have also provided a download and print option for all CBSE Class 12 Biology last year papers and Sample Papers for Class 12 Biology to make it more easy for students. You can download CBSE Class 12 Biology Previous Year Question Papers and Class 12 Biology Sample Papers in PDF absolutely free of cost.

Biology Previous Year Question Papers Class 12 with Solutions

We have provided CBSE Class 12 Biology Question Paper 2022 Set A Solved with solutions. You will be able to understand the type of answers which you should write in Class 12 Biology exams to score good marks. 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. This way you will be able to identify your weak areas and also understand how the teachers of Class 12 Biology set their questions in the exams.

CBSE Class 12 Biology Previous Year Question Papers with solutions

We have provided the last 10 years Class 12 Biology Question Papers. Students who want to practice question papers from all previous years can easily get them on studiestoday. We are the leading website in India from which you can download all the latest Class 12 Biology study material for free as per the CBSE syllabus for Class 12 Biology for the current academic year.
 

Where can I download CBSE Class 12 Biology Question Paper 2022 Set A Solved in Pdf

You can download CBSE Class 12 Biology Question Paper 2022 Set A Solved from StudiesToday.com

Can I download the previous year Question Papers of Class 12 Biology in Pdf

Yes, you can click on the links above and download Question Papers in PDFs for Class 12 for Biology. Click on above link to download CBSE Class 12 Biology Question Paper 2022 Set A Solved

Is the Class 12 Biology Question Paper available for the latest session

Yes, the CBSE Class 12 Biology Question Paper 2022 Set A Solved issued for Class 12 Biology have been made available here for latest academic session

How can I download and print CBSE Class 12 Biology Question Paper 2022 Set A Solved

You can easily access the link above and download CBSE Class 12 Biology Question Paper 2022 Set A Solved and save on your computer of mobile

Is there any charge for CBSE Class 12 Biology Question Paper 2022 Set A Solved

There is no charge for CBSE Class 12 Biology Question Paper 2022 Set A Solved you can download everything free

How can I improve my scores by solving CBSE Class 12 Biology Question Paper 2022 Set A Solved

Regular practice of sample question paper given on studiestoday for CBSE Class 12 Biology Question Paper 2022 Set A Solved can help you to score better marks in exams

Are there any websites that offer free CBSE Class 12 Biology Question Paper 2022 Set A Solved

Yes, studiestoday.com provides all latest CBSE Class 12 Biology Question Papers with answers based on the latest format issued for current academic session

Can model paper CBSE Class 12 Biology Question Paper 2022 Set A Solved be accessed on mobile devices

Yes, studiestoday provides CBSE Class 12 Biology Question Paper 2022 Set A Solved in Pdf and can be accessed on smartphones and tablets.

Are mock CBSE Class 12 Biology Question Paper 2022 Set A Solved available in multiple languages

Yes, mock CBSE Class 12 Biology Question Paper 2022 Set A Solved are available in multiple languages, including English, Hindi