Previous Year Questions (PYQs)

(2015)

1. Describe gastrulation and formation of germ layers with suitable diagrams ?

OR, Show well labelled diagram of the structure of human sperm and write about its components in

brief ?

2. Define linkage and linkage group. Discuss the effect of linkage and its importance ?

OR, What do you understand by an ecosystem? Describe the structure and components of an

ecosystem ?

3. What do you understand by 'micro-propagation'? Write the methods involved with suitable

diagrams ?

OR, What are the methods for improving milk production and quality of milk in a dairy farm.

4. What do you understand by conservation? Describe the methods how biological resources are

conserved.

OR, Write short notes on the following:

(a) Restriction enzymes.

(b) Causes, symptoms and control of cholera.

(2016)

5. What do you understand by Genetic code? Describe the types and characteristics of genetic

code.

Or, Describe how microbes serve as biological control agents of plant diseases and pests.

6. Write about three ecological pyramids with suitable examples.

Or, Draw well labelled diagram of T. S. of human ovary showing various follicles.

7. What do you understand by crossing over? Describe the mechanism of crossing over with

suitable diagram.
Or, Write about the malarial fever, its causes, symptoms, control and prevention.

8. Explain and write about the classification of solid waste and management of waste disposal.

Or, How are microbes essential for human welfare?

(2017)

9. Define crossing over. Describe the process with the help of diagrams.

Or, What do you understand by Double fertilization? Explain it with the help of diagrams.

10. Giving suitable examples, describe the process of sex-determination.

Or, With the help of suitable sketches, describe the process of spermatogenesis.

11. Define Interaction of Genes with suitable crossing and examples.

Or, What are the basic principles of Immunology and their applications?

12. What is ozone layer? Write its effects on atmosphere.

Or, What is food web? Explain it with the help of suitable examples.

(2018)

13. Discuss various methods of contraception for the regulation of population.

Or, What do you mean by chromosomal disorder? Describe the cause and related abnormalities in

the following genetic disorder:

(i) Down syndrome.

(ii) Klinefelter syndrome.

(iii) Turner syndrome.

14. What is adaptive radiation? Illustrate it giving suitable example.

Or, What is Biotechnology? Describe the application of biotechnology in Medicines.

15. What is Acquired Immuno Deficiency Syndrome? Give an account of its pathogen, transmission,

etiology, diagnosis and remedy. Suggest measures for its prevention.

Or, What do you mean by Biodiversity? What is the importance of species Biodiversity in the

Ecosystem? Describe main reasons for depletion of Biodiversity.

16. What are microbes? Describe their role in human welfare in brief.

17. What do you mean by sex? Discuss different types of sex determination in brief.

18. Comment upon cancer in brief.

19. What is pisciculture? Mention its role in enrichment of our food.

20. What is sewage? Describe any one method of its treatment in brief.

21. Draw a detailed diagram of DNA and label it properly.

(2020)

22. What do you understand by sex-determination? Explain sex-linked inheritance with the help of a

suitable example.

23. Answer the following:

(a) Describe the role of microbes in nitrogen fixation.

(b) Write the properties of genetic code.

24. Distinguish between the following:

(a) Gene therapy and Molecular diagnosis.

(b) Oogenesis and Spermatogenesis.

25. Describe the two of the following:

(a) Protoplast culture.

(b) Menstrual cycle.

(c) Genetically modified organisms.

26. Show the following with the help of diagram/sketch only:

(a) Well-labelled diagram of Bacteriophage.

(b) Well-labelled diagram of an angiospermic 8-nucleate embryo-sac.

(c) The formation of blastocyst with the help of a diagram.

27. Define the following:

(b) Genetic drift.

(c) Theory of recapitulation.

(d) Crossing over.

(e) Agrobacterium.

(2021)

28. Write an essay on tissue culture.

29. Describe fertilization in flowering plants.

30. Describe recombinant DNA technology in brief.

31. Describe three ecological pyramids with suitable examples.

32. Discuss various methods of contraception for the population control.

33. What is pisciculture? Mention its role in enrichment of our food.

(2022)

34. What do you mean by biofertilizer? How do biofertilizers increase soil fertility?

35. What is pest management? What do you understand by integrated pest management?

36. Describe the following:

(a) DNA structure proposed by Watson and Crick.

(b) Meselson and Stahl experiment.

37. Describe the lytic cycle of Bacteriophage.

38. What is an artificial ecosystem? Describe an agro-ecosystem.

39. Write short notes on the following:

(a) How are genetically modified crops useful?

(b) Human growth hormone.

(2023)
40. What do you mean by methanogens? How do methanogens help in producing biogas?

41. Describe the following:

(a) Importance of plants in pollution control.

(b) Dairy farm management.

42. What do you understand by Biopesticide? Write a note on BT-toxin.

43. Answer the following questions:

(a) Distinguish between Down's syndrome and Klinefelter's syndrome.

(b) Distinguish between gametogenesis and embryogenesis.

44. Describe sex-linked inheritance with the help of suitable examples.

45. Write short notes on the following:

(a) Ovulation.

(b) Hydrosere.

(2024)

46. Explain the causes of biodiversity loss.

47. Write short notes on the following:

(a) Phosphorus cycle.

(b) Primary immunity.

48. Write short notes on the following:

(a) Allergy.

(b) Chemical composition of DNA.

49. How is gene of interest amplified by using PCR?

50. Answer the following questions:

(a) Stability of DNA is higher than that of RNA. How?

(b) What are the roles of three parts of transcription unit?

51. Write brief notes on the following:

(a) Implantation.
(b) Autogamy.