Evolution
- Submitted by: sumit
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- Category: Science
- Date Submitted: 06/09/2010 07:47 PM
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Sample Paper – 2008
Class – XII
Subject – Biology
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 1 mark each, Section -B is of 10 questions of 2 marks each,
Section -C has 9 questions of 3 marks each and Section D is of 3 questions of 5 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. Attempt only one of the choices in such questions.
4. Wherever necessary, the diagrams drawn should be neat and properly labelled.
SECTION A
1. What is the Ploidy of PEN ? [1]
2. A human zygote has XXY sex chromosomes along with 22 pairs of autosomes
What sex will the individual be? [1]
3. Expand FOAM. What is its significance? [1]
4. Which enzyme is known as ‘molecular scissors’? [1]
5. Name the Ecological pyramid that can be inverted in Tree ecosystem. [1]
6. Explain the term emasculation. When and why does a plant breeder employ [1]
this technique
7. Why is cow dung used in generation of Biogas? [1]
8. Name two animals each that are (i)Oviparous (ii) Viviparous. [1]
SECTION B
9. What are sacred groves ? What is their role in Biodiversity conservation? [2]
10. Mention the advantages of selecting Pea plant for experiment by Mendel. [2]
OR
Why does Mendel’s work gone unnoticed?
11. What measures would you take to prevent water borne disease? [2]
12. What are the disadvantages of human use of Insulin from other animal sources?[2]
13. Name the diseases diagnosed by (a)WIDAL test (b)ELISA test [2]
14. What is Biological Magnification ? [2]
15. Differentiate between Geitonogamy and Allogamy. [2]
16. If the sequence of coding strand in a transcription unit is written as follows : [2]
5’- ATGCATGCATGCATGCATGC-3’
Write the sequence of mRNA
17. Name...
Class – XII
Subject – Biology
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 1 mark each, Section -B is of 10 questions of 2 marks each,
Section -C has 9 questions of 3 marks each and Section D is of 3 questions of 5 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. Attempt only one of the choices in such questions.
4. Wherever necessary, the diagrams drawn should be neat and properly labelled.
SECTION A
1. What is the Ploidy of PEN ? [1]
2. A human zygote has XXY sex chromosomes along with 22 pairs of autosomes
What sex will the individual be? [1]
3. Expand FOAM. What is its significance? [1]
4. Which enzyme is known as ‘molecular scissors’? [1]
5. Name the Ecological pyramid that can be inverted in Tree ecosystem. [1]
6. Explain the term emasculation. When and why does a plant breeder employ [1]
this technique
7. Why is cow dung used in generation of Biogas? [1]
8. Name two animals each that are (i)Oviparous (ii) Viviparous. [1]
SECTION B
9. What are sacred groves ? What is their role in Biodiversity conservation? [2]
10. Mention the advantages of selecting Pea plant for experiment by Mendel. [2]
OR
Why does Mendel’s work gone unnoticed?
11. What measures would you take to prevent water borne disease? [2]
12. What are the disadvantages of human use of Insulin from other animal sources?[2]
13. Name the diseases diagnosed by (a)WIDAL test (b)ELISA test [2]
14. What is Biological Magnification ? [2]
15. Differentiate between Geitonogamy and Allogamy. [2]
16. If the sequence of coding strand in a transcription unit is written as follows : [2]
5’- ATGCATGCATGCATGCATGC-3’
Write the sequence of mRNA
17. Name...