CBSE Biology Outside Delhi Past year paper (Set - 1) - 2014, Class 12 | Additional Study Material for NEET PDF Download

 Page 1


  
 
CBSE XII  |  Biology 
Board Paper 2014 – Outside Delhi – Set 1 
 
     
 
CBSE 
Class XII Biology  
Board Paper 2014 – Outside Delhi (Set 1) 
Time: 3 hrs Total Marks: 70 
 
General Instructions: 
1. All questions are compulsory. 
2. This question paper consists of four Sections A, B, C and D. Section A contains 8 questions 
of one mark each; Section B is of 10 questions of two marks each Section  C  is  of 9  
questions  of  three  marks  each  and Section D is of 3 questions of five marks each. 
3. There is no overall choice. However, an internal choice has been provided in one question 
of 2 marks, one question of 3 marks and all the three questions of 5 marks weightage. A 
student has to attempt only one of the alternatives in such questions. 
4. Wherever necessary, the diagrams drawn should be neat and properly labelled. 
 
 
SECTION A 
 
1. Name the part of the flower which the tassels of the corn- cob represent. [1] 
2. Mention any two contrasting traits with respect to seeds in pea plant that were studied 
by Mendel.  [1] 
 
3. Why is secondary immune response more intense than the primary immune response 
in humans?  [1] 
 
4. Why is it not possible for an alien DNA to become part of a chromosome anywhere 
along its length and replicate normally? [1] 
 
5. State the role of C peptide in human insulin.  [1] 
 
6. Name the enzymes that are used for the isolation of DNA from bacterial and fungal cells 
for recombinant DNA technology.  [1] 
 
7. State Gause’s Competitive Exclusion Principle.  [1] 
 
8. Name the type of association that the genus Glomus exhibits with higher plants. [1] 
 
 
 
 
 
 
 
 
 
Page 2


  
 
CBSE XII  |  Biology 
Board Paper 2014 – Outside Delhi – Set 1 
 
     
 
CBSE 
Class XII Biology  
Board Paper 2014 – Outside Delhi (Set 1) 
Time: 3 hrs Total Marks: 70 
 
General Instructions: 
1. All questions are compulsory. 
2. This question paper consists of four Sections A, B, C and D. Section A contains 8 questions 
of one mark each; Section B is of 10 questions of two marks each Section  C  is  of 9  
questions  of  three  marks  each  and Section D is of 3 questions of five marks each. 
3. There is no overall choice. However, an internal choice has been provided in one question 
of 2 marks, one question of 3 marks and all the three questions of 5 marks weightage. A 
student has to attempt only one of the alternatives in such questions. 
4. Wherever necessary, the diagrams drawn should be neat and properly labelled. 
 
 
SECTION A 
 
1. Name the part of the flower which the tassels of the corn- cob represent. [1] 
2. Mention any two contrasting traits with respect to seeds in pea plant that were studied 
by Mendel.  [1] 
 
3. Why is secondary immune response more intense than the primary immune response 
in humans?  [1] 
 
4. Why is it not possible for an alien DNA to become part of a chromosome anywhere 
along its length and replicate normally? [1] 
 
5. State the role of C peptide in human insulin.  [1] 
 
6. Name the enzymes that are used for the isolation of DNA from bacterial and fungal cells 
for recombinant DNA technology.  [1] 
 
7. State Gause’s Competitive Exclusion Principle.  [1] 
 
8. Name the type of association that the genus Glomus exhibits with higher plants. [1] 
 
 
 
 
 
 
 
 
 
  
 
CBSE XII  |  Biology 
Board Paper 2014 – Outside Delhi – Set 1 
 
     
 
 
SECTION B 
 
9. Why are the human testes located outside the abdominal cavity?  Name the pouch in 
which they are present.  [2] 
 
10. In Snapdragon, a cross between true-breeding red flowered (RR) plants and true-
breeding white flowered (rr) plants showed a progeny of plants with all pink flowers.  
 [2] 
(a) The appearance of pink flowers is not known as blending.  Why?  
(b) What is this phenomenon known as? 
 
11. With the help of one example, explain the phenomena of co-dominance and multiple 
allelism in human population. [2] 
 
12. Write the scientific name of the fruit-fly. Why did Morgan prefer to work with fruit-flies 
for his experiments? State any three reasons.    [2] 
  
OR 
 
              Linkage and crossing-over of genes are alternatives of each other. Justify with the help   
of an example. 
 
13. List the symptoms of Ascariasis. How does a healthy person acquire this infection? [2] 
 
14. Explain   the significant role of the genus Nucleopolyhedrovirus in an ecological sensitive 
area. [2] 
 
15. How does a restriction nuclease function? Explain.  [2] 
 
16. How have transgenic animals proved to be beneficial in:  [2] 
(a) Production of biological products 
(b) Chemical safety testing 
 
17. Describe   the   mutual relationship between fig tree and wasp and comment on the 
phenomenon that operates in their relationship. [2] 
 
18. Construct an age pyramid which reflects an expanding growth status of human 
population.                   [2] 
 
 
 
 
 
 
Page 3


  
 
CBSE XII  |  Biology 
Board Paper 2014 – Outside Delhi – Set 1 
 
     
 
CBSE 
Class XII Biology  
Board Paper 2014 – Outside Delhi (Set 1) 
Time: 3 hrs Total Marks: 70 
 
General Instructions: 
1. All questions are compulsory. 
2. This question paper consists of four Sections A, B, C and D. Section A contains 8 questions 
of one mark each; Section B is of 10 questions of two marks each Section  C  is  of 9  
questions  of  three  marks  each  and Section D is of 3 questions of five marks each. 
3. There is no overall choice. However, an internal choice has been provided in one question 
of 2 marks, one question of 3 marks and all the three questions of 5 marks weightage. A 
student has to attempt only one of the alternatives in such questions. 
4. Wherever necessary, the diagrams drawn should be neat and properly labelled. 
 
 
SECTION A 
 
1. Name the part of the flower which the tassels of the corn- cob represent. [1] 
2. Mention any two contrasting traits with respect to seeds in pea plant that were studied 
by Mendel.  [1] 
 
3. Why is secondary immune response more intense than the primary immune response 
in humans?  [1] 
 
4. Why is it not possible for an alien DNA to become part of a chromosome anywhere 
along its length and replicate normally? [1] 
 
5. State the role of C peptide in human insulin.  [1] 
 
6. Name the enzymes that are used for the isolation of DNA from bacterial and fungal cells 
for recombinant DNA technology.  [1] 
 
7. State Gause’s Competitive Exclusion Principle.  [1] 
 
8. Name the type of association that the genus Glomus exhibits with higher plants. [1] 
 
 
 
 
 
 
 
 
 
  
 
CBSE XII  |  Biology 
Board Paper 2014 – Outside Delhi – Set 1 
 
     
 
 
SECTION B 
 
9. Why are the human testes located outside the abdominal cavity?  Name the pouch in 
which they are present.  [2] 
 
10. In Snapdragon, a cross between true-breeding red flowered (RR) plants and true-
breeding white flowered (rr) plants showed a progeny of plants with all pink flowers.  
 [2] 
(a) The appearance of pink flowers is not known as blending.  Why?  
(b) What is this phenomenon known as? 
 
11. With the help of one example, explain the phenomena of co-dominance and multiple 
allelism in human population. [2] 
 
12. Write the scientific name of the fruit-fly. Why did Morgan prefer to work with fruit-flies 
for his experiments? State any three reasons.    [2] 
  
OR 
 
              Linkage and crossing-over of genes are alternatives of each other. Justify with the help   
of an example. 
 
13. List the symptoms of Ascariasis. How does a healthy person acquire this infection? [2] 
 
14. Explain   the significant role of the genus Nucleopolyhedrovirus in an ecological sensitive 
area. [2] 
 
15. How does a restriction nuclease function? Explain.  [2] 
 
16. How have transgenic animals proved to be beneficial in:  [2] 
(a) Production of biological products 
(b) Chemical safety testing 
 
17. Describe   the   mutual relationship between fig tree and wasp and comment on the 
phenomenon that operates in their relationship. [2] 
 
18. Construct an age pyramid which reflects an expanding growth status of human 
population.                   [2] 
 
 
 
 
 
 
  
 
CBSE XII  |  Biology 
Board Paper 2014 – Outside Delhi – Set 1 
 
     
 
 
SECTION C 
 
19. Make a list of any three outbreeding devices that flowering plants have developed and 
explain how they help to encourage cross-pollination.    [3] 
  
OR 
 
Why angiosperm anthers are called dithecous? Describe the structure of its 
microsporangium. 
 
20. If implementation of better techniques and new strategies are required to provide more 
efficient care and assistance to people, then why is there a statutory ban on 
amniocentesis? Write the use of this technique and give reason to justify the ban. [3] 
 
21. Why is pedigree analysis done in the study of human genetics? State the conclusions 
that can be drawn from it.  [3] 
 
22. Identify 'a', 'b', 'c',’d’, 'e' and 'f' in the table given below: [3] 
 
No. Syndrome Cause Characteristics of 
affected individuals 
Sex 
Male/Female/Both 
1. Down's Trisomy of 
21 
'a'   (i) 
(ii) 
'b' 
 
2. 'c' XXY Overall masculine 
development. 
'd' 
 
3. Turner's 45 with XO 'e'  (i) 
(ii) 
'f' 
 
 
23. Community Service department of your school plans a visit to a slum area near the 
school with an objective to educate the slum dwellers with respect to health and 
hygiene.  
 [3] 
(a) Why is there a need to organize such visits? 
 
(b) Write the steps you will highlight, as a member of this department, in your 
interaction with them to enable them to lead a healthy life. 
 
 
 
 
 
 
 
Page 4


  
 
CBSE XII  |  Biology 
Board Paper 2014 – Outside Delhi – Set 1 
 
     
 
CBSE 
Class XII Biology  
Board Paper 2014 – Outside Delhi (Set 1) 
Time: 3 hrs Total Marks: 70 
 
General Instructions: 
1. All questions are compulsory. 
2. This question paper consists of four Sections A, B, C and D. Section A contains 8 questions 
of one mark each; Section B is of 10 questions of two marks each Section  C  is  of 9  
questions  of  three  marks  each  and Section D is of 3 questions of five marks each. 
3. There is no overall choice. However, an internal choice has been provided in one question 
of 2 marks, one question of 3 marks and all the three questions of 5 marks weightage. A 
student has to attempt only one of the alternatives in such questions. 
4. Wherever necessary, the diagrams drawn should be neat and properly labelled. 
 
 
SECTION A 
 
1. Name the part of the flower which the tassels of the corn- cob represent. [1] 
2. Mention any two contrasting traits with respect to seeds in pea plant that were studied 
by Mendel.  [1] 
 
3. Why is secondary immune response more intense than the primary immune response 
in humans?  [1] 
 
4. Why is it not possible for an alien DNA to become part of a chromosome anywhere 
along its length and replicate normally? [1] 
 
5. State the role of C peptide in human insulin.  [1] 
 
6. Name the enzymes that are used for the isolation of DNA from bacterial and fungal cells 
for recombinant DNA technology.  [1] 
 
7. State Gause’s Competitive Exclusion Principle.  [1] 
 
8. Name the type of association that the genus Glomus exhibits with higher plants. [1] 
 
 
 
 
 
 
 
 
 
  
 
CBSE XII  |  Biology 
Board Paper 2014 – Outside Delhi – Set 1 
 
     
 
 
SECTION B 
 
9. Why are the human testes located outside the abdominal cavity?  Name the pouch in 
which they are present.  [2] 
 
10. In Snapdragon, a cross between true-breeding red flowered (RR) plants and true-
breeding white flowered (rr) plants showed a progeny of plants with all pink flowers.  
 [2] 
(a) The appearance of pink flowers is not known as blending.  Why?  
(b) What is this phenomenon known as? 
 
11. With the help of one example, explain the phenomena of co-dominance and multiple 
allelism in human population. [2] 
 
12. Write the scientific name of the fruit-fly. Why did Morgan prefer to work with fruit-flies 
for his experiments? State any three reasons.    [2] 
  
OR 
 
              Linkage and crossing-over of genes are alternatives of each other. Justify with the help   
of an example. 
 
13. List the symptoms of Ascariasis. How does a healthy person acquire this infection? [2] 
 
14. Explain   the significant role of the genus Nucleopolyhedrovirus in an ecological sensitive 
area. [2] 
 
15. How does a restriction nuclease function? Explain.  [2] 
 
16. How have transgenic animals proved to be beneficial in:  [2] 
(a) Production of biological products 
(b) Chemical safety testing 
 
17. Describe   the   mutual relationship between fig tree and wasp and comment on the 
phenomenon that operates in their relationship. [2] 
 
18. Construct an age pyramid which reflects an expanding growth status of human 
population.                   [2] 
 
 
 
 
 
 
  
 
CBSE XII  |  Biology 
Board Paper 2014 – Outside Delhi – Set 1 
 
     
 
 
SECTION C 
 
19. Make a list of any three outbreeding devices that flowering plants have developed and 
explain how they help to encourage cross-pollination.    [3] 
  
OR 
 
Why angiosperm anthers are called dithecous? Describe the structure of its 
microsporangium. 
 
20. If implementation of better techniques and new strategies are required to provide more 
efficient care and assistance to people, then why is there a statutory ban on 
amniocentesis? Write the use of this technique and give reason to justify the ban. [3] 
 
21. Why is pedigree analysis done in the study of human genetics? State the conclusions 
that can be drawn from it.  [3] 
 
22. Identify 'a', 'b', 'c',’d’, 'e' and 'f' in the table given below: [3] 
 
No. Syndrome Cause Characteristics of 
affected individuals 
Sex 
Male/Female/Both 
1. Down's Trisomy of 
21 
'a'   (i) 
(ii) 
'b' 
 
2. 'c' XXY Overall masculine 
development. 
'd' 
 
3. Turner's 45 with XO 'e'  (i) 
(ii) 
'f' 
 
 
23. Community Service department of your school plans a visit to a slum area near the 
school with an objective to educate the slum dwellers with respect to health and 
hygiene.  
 [3] 
(a) Why is there a need to organize such visits? 
 
(b) Write the steps you will highlight, as a member of this department, in your 
interaction with them to enable them to lead a healthy life. 
 
 
 
 
 
 
 
  
 
CBSE XII  |  Biology 
Board Paper 2014 – Outside Delhi – Set 1 
 
     
 
 
24. The following graph shows the species - area relationship. Answer the following 
questions as directed. [3] 
 
 
(a) Name the naturalist who studied the kind of relationship shown in the graph. Write 
the observations made by him. 
 
(b) Write the situations as discovered by the ecologists when the value of 'Z'  
(Slope of the line) lies between. 
(i) 0.1 and 0.2  
(ii) 0.6 and 1.2  
What does 'Z' stand for? 
 
(c) When would the slope of the line 'b' become steeper? 
 
25. Name and describe the technique that   helps in separating the DNA fragments formed 
by the use of restriction endonuclease. [3] 
 
26. State the   function   of a reservoir in a nutrient cycle. Explain the simplified model of 
carbon cycle in nature.          [3] 
 
27. Since the origin of life on Earth, there   were five episodes of mass extinction of species. [3] 
(i) How is the ‘Sixth Extinction’, presently in progress, different from the previous 
episodes? 
(ii) Who is mainly responsible for the 'Sixth Extinction’? 
(iii) List any four points that can help to overcome this disaster. 
 
 
 
 
 
 
 
 
 
 
Page 5


  
 
CBSE XII  |  Biology 
Board Paper 2014 – Outside Delhi – Set 1 
 
     
 
CBSE 
Class XII Biology  
Board Paper 2014 – Outside Delhi (Set 1) 
Time: 3 hrs Total Marks: 70 
 
General Instructions: 
1. All questions are compulsory. 
2. This question paper consists of four Sections A, B, C and D. Section A contains 8 questions 
of one mark each; Section B is of 10 questions of two marks each Section  C  is  of 9  
questions  of  three  marks  each  and Section D is of 3 questions of five marks each. 
3. There is no overall choice. However, an internal choice has been provided in one question 
of 2 marks, one question of 3 marks and all the three questions of 5 marks weightage. A 
student has to attempt only one of the alternatives in such questions. 
4. Wherever necessary, the diagrams drawn should be neat and properly labelled. 
 
 
SECTION A 
 
1. Name the part of the flower which the tassels of the corn- cob represent. [1] 
2. Mention any two contrasting traits with respect to seeds in pea plant that were studied 
by Mendel.  [1] 
 
3. Why is secondary immune response more intense than the primary immune response 
in humans?  [1] 
 
4. Why is it not possible for an alien DNA to become part of a chromosome anywhere 
along its length and replicate normally? [1] 
 
5. State the role of C peptide in human insulin.  [1] 
 
6. Name the enzymes that are used for the isolation of DNA from bacterial and fungal cells 
for recombinant DNA technology.  [1] 
 
7. State Gause’s Competitive Exclusion Principle.  [1] 
 
8. Name the type of association that the genus Glomus exhibits with higher plants. [1] 
 
 
 
 
 
 
 
 
 
  
 
CBSE XII  |  Biology 
Board Paper 2014 – Outside Delhi – Set 1 
 
     
 
 
SECTION B 
 
9. Why are the human testes located outside the abdominal cavity?  Name the pouch in 
which they are present.  [2] 
 
10. In Snapdragon, a cross between true-breeding red flowered (RR) plants and true-
breeding white flowered (rr) plants showed a progeny of plants with all pink flowers.  
 [2] 
(a) The appearance of pink flowers is not known as blending.  Why?  
(b) What is this phenomenon known as? 
 
11. With the help of one example, explain the phenomena of co-dominance and multiple 
allelism in human population. [2] 
 
12. Write the scientific name of the fruit-fly. Why did Morgan prefer to work with fruit-flies 
for his experiments? State any three reasons.    [2] 
  
OR 
 
              Linkage and crossing-over of genes are alternatives of each other. Justify with the help   
of an example. 
 
13. List the symptoms of Ascariasis. How does a healthy person acquire this infection? [2] 
 
14. Explain   the significant role of the genus Nucleopolyhedrovirus in an ecological sensitive 
area. [2] 
 
15. How does a restriction nuclease function? Explain.  [2] 
 
16. How have transgenic animals proved to be beneficial in:  [2] 
(a) Production of biological products 
(b) Chemical safety testing 
 
17. Describe   the   mutual relationship between fig tree and wasp and comment on the 
phenomenon that operates in their relationship. [2] 
 
18. Construct an age pyramid which reflects an expanding growth status of human 
population.                   [2] 
 
 
 
 
 
 
  
 
CBSE XII  |  Biology 
Board Paper 2014 – Outside Delhi – Set 1 
 
     
 
 
SECTION C 
 
19. Make a list of any three outbreeding devices that flowering plants have developed and 
explain how they help to encourage cross-pollination.    [3] 
  
OR 
 
Why angiosperm anthers are called dithecous? Describe the structure of its 
microsporangium. 
 
20. If implementation of better techniques and new strategies are required to provide more 
efficient care and assistance to people, then why is there a statutory ban on 
amniocentesis? Write the use of this technique and give reason to justify the ban. [3] 
 
21. Why is pedigree analysis done in the study of human genetics? State the conclusions 
that can be drawn from it.  [3] 
 
22. Identify 'a', 'b', 'c',’d’, 'e' and 'f' in the table given below: [3] 
 
No. Syndrome Cause Characteristics of 
affected individuals 
Sex 
Male/Female/Both 
1. Down's Trisomy of 
21 
'a'   (i) 
(ii) 
'b' 
 
2. 'c' XXY Overall masculine 
development. 
'd' 
 
3. Turner's 45 with XO 'e'  (i) 
(ii) 
'f' 
 
 
23. Community Service department of your school plans a visit to a slum area near the 
school with an objective to educate the slum dwellers with respect to health and 
hygiene.  
 [3] 
(a) Why is there a need to organize such visits? 
 
(b) Write the steps you will highlight, as a member of this department, in your 
interaction with them to enable them to lead a healthy life. 
 
 
 
 
 
 
 
  
 
CBSE XII  |  Biology 
Board Paper 2014 – Outside Delhi – Set 1 
 
     
 
 
24. The following graph shows the species - area relationship. Answer the following 
questions as directed. [3] 
 
 
(a) Name the naturalist who studied the kind of relationship shown in the graph. Write 
the observations made by him. 
 
(b) Write the situations as discovered by the ecologists when the value of 'Z'  
(Slope of the line) lies between. 
(i) 0.1 and 0.2  
(ii) 0.6 and 1.2  
What does 'Z' stand for? 
 
(c) When would the slope of the line 'b' become steeper? 
 
25. Name and describe the technique that   helps in separating the DNA fragments formed 
by the use of restriction endonuclease. [3] 
 
26. State the   function   of a reservoir in a nutrient cycle. Explain the simplified model of 
carbon cycle in nature.          [3] 
 
27. Since the origin of life on Earth, there   were five episodes of mass extinction of species. [3] 
(i) How is the ‘Sixth Extinction’, presently in progress, different from the previous 
episodes? 
(ii) Who is mainly responsible for the 'Sixth Extinction’? 
(iii) List any four points that can help to overcome this disaster. 
 
 
 
 
 
 
 
 
 
 
  
 
CBSE XII  |  Biology 
Board Paper 2014 – Outside Delhi – Set 1 
 
     
 
 
SECTION D 
28.      [5] 
(a) Where does fertilization occur in humans? Explain the events that occur during this 
process. 
(b) A couple where both husband and wife are producing functional gametes, but the 
wife is still unable to conceive, is seeking medical aid. Describe any one method that 
you can suggest to this couple to become happy parents.  
     
OR 
 
(a) Explain the different ways apomictic seeds can develop, Give an example of each. 
(b) Mention one advantage of apomictic seeds to farmers. 
(c) Draw a labelled mature stage of a dicotyledonous embryo.  
 
29.     [5]  
(a) Describe the various steps of Griffith’s experiment that led to the conclusion of the 
'Transforming Principle'. 
(b) How did the chemical nature of the ‘Transforming Principle' get established?  
                 
OR 
 
Describe how the lac operon operates, both in the presence and absence of an inducer 
in E.coli. 
 
30. With advancements in genetics, molecular biology and tissue culture, new traits have 
been incorporated into crop plants. Explain the main steps in breeding a new genetic 
variety of a crop.  [5]           
 
OR 
  
(a) State the objective of animal breeding. 
(b) List the importance and limitations of inbreeding.  How can the limitations be 
overcome? 
(c) Give an example of a new breed each of cattle and poultry.