CBSE Class 12 Biology Question Papers Outside Delhi 2013 (1)

CBSE Class 12 Biology Question Papers Outside Delhi 2013 (1). Students can download the last year question papers using the link below.Free download of examination question papers with solutions.Last 10 year question papers should be practised to get better marks in examinations.

1. Why does thinning of bones usually start occurring in human females at about 50 years of age ?

2. Drosera carries out photosynthesis and still traps insects. Why ?

3. What causes Gouty Arthritis in humans ?

4. List two factors that determine the vegetation and soil type of an ecosystem.

5. Why is gene encoding for “Cry” protein inserted into a crop plant ?

6. What is multiplicative growth ? How is it different from auxetic growth ?

7.What is the source of explants in a meristem culture?Mention one function of cytokinins used in the meristem culture medium.

8. Why do temperate regions show a lower value of primary productivity as compared to tropical regions ? Give two reasons.

9. What is biogas ? Give its composition. Why is biogas preferred to other conventional energy fuels ?

10. An Rh-negative mother has safely delivered her first Rh-positive child. Discuss the problems that can arise as a result of it and can affect a subsequent pregnancy.

11. Explain symbiotic nitrogen fixation in leguminous plants.

12. What is oxidative decarboxylation ? What happens to pyruvate immediately after this reaction ? Name the enzyme involved in this reaction.

Please click the link below to download pdf file of CBSE Class 12 Biology Question Papers Outside Delhi 2013 (1).