PSEB TERM 2 MODEL TEST PAPER BIOLOGY CLASS 10+2
CLASS-XII SUBJECT-BIOLOGY (Theory) TERM 2
Time : 2 Hours Max, Marks : 35
SECTION-A
Each question carries 1 mark :
1. Define livestock and inbreed line
2. What is gene therapy ? Give one example.
3. Write two hazards of transgenic animals.
4. What is diapause? How is it different from hibernation?
5. Why ozone hole forms over Antarctica ?
SECTION-B
Each question carries 2 marks:
6. What are the advantages of producing plant by micro-propagation.
7. In which food you find lactic acid bacteria ? Mention some of their useful applications.
8. What are 'molecular scissors'? Explain their role.
9. List three important features necessary for preparing genetically modified organism.
10. Write disadvantages of production of genetically modified crops.
11. How humulin is synthesized in human?
12. Differentiate , National Park, Sanctuary, and biosphere reserve.
13. What does the diagram represent ? Write the working of the same
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SECTION-C
Each question carries 3 marks:
14. Explain cyanobacteria as source of bio fertilizer.
15. Write note on Bt cotton .
16. With the help of suitable diagram describe the logistic population growth curve
SECTION-D
Each question carries 5 marks:
17. Explain the effects of habitant fragmentation on biodiversity.
Or
Discuss the causes and effects of global warming. What measures need to be taken to control global warming?
