CBSE Class 12 Biology Question Paper 2020 Set C Solved

Biology
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Read and download CBSE Class 12 Biology Question Paper 2020 Set C 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 2020 Set C Solved

Biology Class 12 Question Paper

SECTION A
 
1 A male honeybee has 16 chromosomes whereas its female has 32 chromosomes. Give one reason. 
 
2 Breast fed babies are more immune to diseases than the bottle fed babies. Why? 
 
3 How can an alien piece of DNA made to multiply in a host cell? 
 
4 State the principle used in ELISA? 
 
5 What is the relationship between egret and grazing cattle? Why?

OR
 
How is competition avoided in Nature? Give example.
 
SECTION B
 
6 How does geitonogamy differ from xenogamy in plants? 
 
7 Categories the following pairs of examples as convergent or divergent evolutions: (a) Eyes of octopus and mammals. (b) Wings of butterfly and birds. (c) Tuber of sweet potatoes and potato.
(d) Thorns in bougainvillea and tendrils in cucurbits.
 
8 Monocistronic structural genes in eukaryotes have interrupted coding sequences, Explain. How are they different in prokaryotes?
 
9 A person shows unwelcome immunogenic reactions while exposed to certain substances. (a) Name this condition. (b) What common term is given to the substances responsible for this condition? (c) Name the cells and the chemical substances released which cause such reactions.
 
10 Why are proteins synthesized from Spirulina called Single celled Proteins? What is the significance of such a protein?
 
OR
 
Lactic Acid Bacteria (LAB) is commonly used in the conversion of milk into curd. Mention any two other functions of LAB that are useful to humans.
 
11 How are transgenic animals made useful in chemical safety testing and studying diseases? 
 
12 What characteristic features are seen in Ecological succession? 
 
SECTION C
 
13 Explain the structure of microsporangium. 
 
14 Explain free nuclear endosperm development.
 
OR
 
Mention any three differences between spermatogenesis and oogenesis.
 
15 What will be the genotype and phenotype of the offspring if a colour blind man marries a carrier woman? Show the cross.
 
OR
 
How do histones acquire positive charge?
 
16 Explain the role of S and P in the experiments conducted by Hershey and chase?
 
OR
 
Explain the mechanism of sex determination in honeybees.
 
17 Evolution is the change of gene frequencies in a population in response to changes in environment in the time scale of years and not centuries. Justify the statement with reference to DDT. How does the theory of Hugo de varies support this?
 
18 List the advantages of Apiculture, if it is located near a place of commercial flower cultivation. Name the most common species of bee which is reared in India.
 
OR
 
How does primary sludge differ from activated sludge? Give the composition of biogas produced in the sewage treatment plant.
 
19 What are statins? Name the microorganism that produces this substance. How is it medically important?
20 How do mycorrhizae function as biofertilisers? Explain with example. Name one cyanobacteria
that can be used as a biofertiliser.
 
21 How is Biotechnology used to produce Bt cotton? Explain.
 
22 How is Agrobacterium tumifaciens used in rDNA technology? Explain what and how are other pathogens are used for the purpose. State two other methods by which host organism can be transformed.
 
23 a) Taking one example each of habitat loss and fragmentation, explain how the two are responsible for biodiversity loss. b) Explain two different ways of biodiversity conservation.
 
24 What are the contribution of Ahmed Khan in Bangalore and Ramesh Chandra Dagar in Sonipat? 
 
SECTION D
 
25 Describe the development of male gametophyte in angiosperms.
 
OR
 
What is placenta? What is its role? Justify Placenta as an endocrine tissue.
 
26 People have been actively participating in the efforts for the conservation of forests. (i) Name the award instituted in respect of Amrita Devi to promote such efforts. (ii) Name the movement launched to protect the trees by hugging them. (iii) Name the step Government of India has undertaken in 1980.s to work closely with the local communities for protecting and managing forests.
 
OR
 
a) Alien species are highly invasive and are a threat to indigenous species. Substantiate this statement with any three examples.
b) Give two example of mutualistic relationship.
 
27 What is a point mutation? Illustrate using the example of Sickle cell anaemia. Give the genotypes of a career and a sickle celled person.
 
OR
 
Explain the role of RNA polymerase in transcription in bacteria.


Please click on below link to downloadCBSE Class 12 Biology Question Paper 2020 Set C 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 1 with Answers (Reval)
CBSE Class 12 Biology Question Paper 2015 (Delhi Set 2) with Answers (Compartment)
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 (Compartment)
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 (Compartment)
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 (Compartment)
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 (Compartment)
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)
CBSE Class 12 Biology Question Paper 2007 (2)
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)
2005
CBSE Class 12 Biology Question Paper 2005 (1)
CBSE Class 12 Biology Question Paper 2005 (2)
* More Question Papers
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

CBSE Class 12 Biology Question Paper 2020 Set C Solved

We hope you liked the above provided CBSE Class 12 Biology Question Paper 2020 Set C 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 2020 Set C 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. By doing all CBSE Class 12 Biology Question Paper 2020 Set C 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. You can download CBSE Class 12 Biology Previous Year Question Papers and Class 12 Biology Sample 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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