CBSE Class 12 Biology Compartment Question Paper Solved 2020 Set B

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

Biology Class 12 Question Paper

SECTION A
1. The role of FSH in the process of spermatogenesis in humans is to
 
(A) stimulate the secretion of certain factors from Sertoli cells.
 
(B) inhibit the secretion of testosterone from the interstitial cells.
 
(C) stimulate the action of testosterone on Sertoli cells.
 
(D) stimulate the secretion of LH from pituitary cells.
 
2. Some cyanobacteria in aquatic and terrestrial environment that enrich the soil by fixing atmospheric nitrogen are 
 
(A) Rhizobium and Azotobacter
 
(B) Azospirillum and Glomus
 
(C) Anabaena and Nostoc
 
(D) Azospirillum and Azotobacter
OR
Colostrum provides passive immunity to human infants as it contains antibody
 
(A) IgA
 
(B) IgM
 
(C) IgE
 
(D) IgG
 
3. The specific site for fertilisation in human female is 
 
(A) Infundibulum
 
(B) Uterus
 
(C) Ampulla
 
(D) Ampullary isthmic junction
OR
The hormone that regulates the synthesis and secretion of androgens in human males is 
 
(A) GH
 
(B) FSH
 
(C) LH
 
(D) Prolactin
 
4. In biotechnology experiments, ‘molecular scissors’ used are 
 
(A) Plasmid
 
(B) Restriction enzymes
 
(C) Vectors
 
(D) Sigma factor
 
5. ‘Cry genes’ that code for insecticidal toxins are present in 
 
(A) Cotton bollworms
 
(B) Nematodes
 
(C) Corn borer
 
(D) Bacillus thuringiensis
 
SECTION B
 
6. Why do some organisms enter into diapause while some others into aestivation ? Give one example each of such organisms. 
 
7. Mendel did not explain the expression of incomplete dominance in plants.
 
Give an example of flower exhibiting incomplete dominance.
 
Name and state the Law of Mendel the genes which exhibit incomplete dominance follow. 
OR
Your teacher gave you a tall pea plant and asked you to find whether the plant is homozygous tall or heterozygous tall. How will you proceed to find the genotype of the given plant ? 
 
8. Draw a schematic diagram of a transcription unit with the polarity of the DNA strands and label coding strand, template strand and terminator. 
 
9. Causative organisms of some diseases gain entry into human body through mosquito bites and make humans suffer from the disease.
 
Name one such :
(i) protozoan disease along with the scientific name of the causative organism.
 
(ii) helminthes disease along with the scientific name of the causative organism. 
 
10. What is ‘bagging’ ? State its importance in artificial hybridization of flowering plants.
 
11. (a) Mention the difference in the level of BOD before and after the secondary treatment of sewage water.
 
(b) Write the importance of ‘flocs’ during the secondary treatment of sewage. 
 
12. Name any two cereal crops that have been fortified. Mention how.
 
Please click on below link to download CBSE Class 12 Biology Compartment Question Paper Solved 2020 Set B.
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
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Previous Year Question Paper Class 12 Biology

CBSE Class 12 Biology Compartment Question Paper Solved 2020 Set B

We hope you liked the above provided CBSE Class 12 Biology Compartment Question Paper Solved 2020 Set B. 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 Compartment Question Paper Solved 2020 Set B 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 Compartment Question Paper Solved 2020 Set B 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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