CBSE Board Class 11 Biology Previous Year Question Papers 2007

Previous paper
BIOLOGY

Class - XI

1.What is Down’s syndrome.

2.What is walking fern.

3.What is cell fractanation.

4.What is endosperm
OR
What is oncogenesis.

5. What is cell theory.

6. What is test cross.

7. What is cloning
OR
Draw reproductive organs of rat.

8. Write principle of DNA fingerprinting.

9. Draw body plan of mollusc.

10. Write all taxonomic hierarchies.

11. Mention the two laws of thermodynamics.

12. Write significance of mitosis.

13. Mention properties of enzymes.

14. Write merits and demerits of Benthem and Hooker’s classification.

15. Distinguish between cyton and axon.

16. Explain epistasis
OR
Distinguish between prokaryotic and eukaryotic cell.

17. Draw T.S. of typical monocot root.

18. Explain genetic disorders

19.Explain vestigal organs.

20. What is competitive inhibition
OR
Draw a compound microscope.

21. Explain Hershley and Chase experiment.

22. What is chiasmata describe its significance.

23. How is sex determined in humans.

24. Explain phyllotaxy and heterophylly.

25. Explain an earthworm
OR
Describe modifications of roots.

26. Explain biosynthesis of proteins.

27. Describe class aves and reptilian
OR
Describe complex tissues.