CBSE Class 12 Biology Sample Paper 2022 Set D Solved

Biology
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Read and download PDF of CBSE Class 12 Biology Sample Paper 2022 Set D Solved designed as per the latest curriculum and examination pattern for Class 12 issued by CBSE, NCERT and KVS. The latest Class 12 Biology Sample Papers have been provided with solutions so that the students can solve these practice papers and then compare their answers. This will help them to identify mistakes and improvement areas in Biology Class 12 which they need to study more to get better marks in Class 12 exams. After solving these guess papers also refer to solved Class 12 Biology Question Papers available on our website to build strong understanding of the subject

Sample Paper for Class 12 Biology Pdf

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

Biology Class 12 Sample Paper

SECTION- A
 
1. How many pollen grains and ovules are likely to be formed in the anther and the ovary of an angiosperm bearing 25 microspore mother cells and 25 megaspore mother cells respectively?
 
OR
 
In case of polyembryony, an embryo A develops from the synergids and the embryo B develops from the nucellus. State the ploidy of embryo A and B.
 
2. Give the scientific name of the source organism from which the first antibiotic was produced. 
 
3. The prophase I stage of meiosis plays a vital role in r-DNA formation. Justify with reason. 
 
4. Name the technique by which Gene expression can be controlled with the help of RNA molecule.
 
5. Define Diapause
 
OR
 
Define Standing Crop
 
SECTION- B
 
6. The figure given below represents a molecule present in the body of a mammal -
CBSE Class 12 Biology Sample Paper 2022 Set D Solved 1
 
a) Name the parts labelled ‘a’ and ‘b’ in the molecule shown above.
b) Name the type of cells that produce this molecule.
 
OR
 
Life style diseases are increasing alarmingly in India. We are also dealing with large scale malnutrition in the population. Suggest a process by which we can address both these problems. Give any three examples to support your answer.
 
7. Why does the lac operon shut down some time after the addition of lactose in the medium where E.coli was growing? Why low level expression of lac operon is always required?
 
8. a) While cloning vectors, which of the two will be preferred by biotechnologists - bacteriophages or plasmids. Justify with reason.
b) Name the first transgenic cow developed and state the improvement in the quality of the product produced by it.
 
9. Explain the impact of removal of thymus gland on the immune system of a human body.
 
OR
 
A farmer maintained beehives in his Brassica field during its flowering season. How will he be benefitted?
 
10. How do automobiles fitted with catalytic converters reduce air pollution? Suggest the best fuel for such vehicles.
 
11. State the Mendelian principle which can be derived from a dihybrid cross and not from monohybrid cross.
 
12. Comment upon the mode of pollination in Vallisneria and Eichhornia which have emergent flowers.
 
SECTION- C
 
13. Alien species are highly invasive and are a threat to indigenous species. Substantiate this statement with any three examples.
 
14. The embryo sac in female gametophyte is seven celled and eight nucleated structure. Justify the statement with the help of a labelled diagram.
 
OR
 
List the changes that occur when an ovule matures into seed.
 
15. Compare and contrast the theories of evolution proposed by Darwin and Hugo De Vries. 
 
16. Explain the different steps involved in the secondary treatment of sewage.
 
OR
 
Microbes can be used to decrease the use of chemical fertilizers. Explain how this can be accomplished.
 
17. a) How do DNA fragments migrate and resolve in a Gel electrophoresis?
b) How lane one is different from lane 2, 3 and 4 in the Gel electrophoresis set up?
c) How pure DNA fragments are made observable in the visible light?
 
CBSE Class 12 Biology Sample Paper 2022 Set D Solved 2
 
18. Suggest and explain the assisted reproductive techniques which will help a couple to have children, where the female had a blockage in the fallopian tube and the male partner had a low sperm count.
 
19. a) Construct a complete transcription unit with promoter and terminator on the basis of the hypothetical template strand given below:
CBSE Class 12 Biology Sample Paper 2022 Set D Solved 3
b) Write the RNA strand transcribed from the above transcription unit along with its polarity.
 
OR
 
a) Mention two events in which DNA is unzipped.
b) Predict the consequences when both the template and the coding strands of a DNA segment participate in transcription process?


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CBSE Class 12 Biology Sample Paper 2023 Solved
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CBSE Class 12 Biology Sample Paper 2022 Set D Solved
2021
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2020
CBSE Class 12 Biology Boards 2020 Sample Paper Solved
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2019
CBSE Class 12 Biology Sample Paper 2019 Solved
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2018
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2017
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2015
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2014
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2013
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2012
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2011
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2010
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2009
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CBSE Class 12 Biology Sample Paper 2022 Set D Solved

We hope you liked the above provided CBSE Class 12 Biology Sample Paper 2022 Set D Solved. To get an understanding of the type of questions which were asked in exams, it is important for Class 12 students to understand the way sample Paper are set by teachers. Students can download the Sample Paper for Class 12 Biology which will be coming in the exams so that you can practise them and solve all types of questions that can be asked in exams. By doing CBSE Class 12 Biology Sample Paper 2022 Set D Solved you will understand the regular questions and MCQ questions for Class 12 Biology which are always asked. You can download CBSE Class 12 Biology Sample Paper and Class 12 Biology Question 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.

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