Jkbose 12th Class Biology Guess Paper 2025 Most Important Questions

Jkbose 12th Class Biology Guess Paper 2025 Most Important Questions 

ZOOLOGY

Q1. Define Genome? Why is the Human Genome Project called a Mega project? Write down its future implications.

Q2. Explain Hardy–Weinberg’s principle? Add a note on Gene flow.

Q3. Explain the need for Reproductive Health. Also, add a note on medical termination of pregnancy.

Q4. Describe the human male and female reproductive system with the help of a diagram.

Q5. What do you mean by ‘DNA Fingerprinting’? Explain in brief the ‘Human Genome Project’ and its significance.

Q6. Explain Hardy-Weinberg’s principle. Add a note on adaptive radiation.

Q7. Describe the processes of spermatogenesis in human males and oogenesis in human females.

Q8. What is Assisted Reproductive Technology (ART)? Give examples such as IVF, GIFT, and ZIFT.

Q9. Explain the microscopic anatomy of the testis with a neat labelled diagram.

Q10. What is fertilization? Explain embryo development up to the blastocyst stage.

Q11. What is the menstrual cycle? Explain the ovarian and uterine changes during the cycle.

Q12.

a) Write a short note on Testis.

b) Write a short note on Ovaries.

Q13. What do you mean by Fetal Ejection Reflex?

Q14. Give two differences between a primary (1°) oocyte and a secondary (2°) oocyte.

Q15. Explain the mechanism of sex determination in humans.

Q16. How is sex determined in birds?

Q17. Give examples of environmental determination of sex.

Q18. What is DNA fingerprinting? Write its steps and applications.

Q19. What do you mean by Sex-linked inheritance? Explain with reference to haemophilia and colour blindness.

Q20. Explain adaptive radiation and convergent evolution with suitable examples.

Q21. Define natural selection and write its types.

Q22. Write a short note on Modern Synthetic Theory of Evolution.

Q23. Write a short note on Adolescence.

Q24. Give the causative agent, symptoms, and preventive measures of:

a) Typhoid

b) Filariasis (Elephantiasis)

c) Malaria

d) AIDS

e) Ascariasis

f) Amoebiasis

g) Hepatitis

Q25. Describe Cancer as a major cause of death along with its causes and possible treatments.

Q26. Give the applications/significance of gene therapy.

Q27. What do you mean by Golden Rice?

BOTANY

Q28. What is an Operon? Explain an Inducible Operon.

Q29. State the principle of Independent Assortment. Explain it with a dihybrid cross. Name one exception to this principle.

Q30. Describe the attributes that populations possess but not individuals.

Q31. Define Ecological Pyramid. Name the three types of ecological pyramids. What information is conveyed by each pyramid regarding structure, functions and energy in the ecosystem?

Q32. Define Parthenocarpy. Differentiate between vegetative and stimulative parthenocarpy.

Q33. Explain male gametophyte formation with diagrams.

Q34. Explain monosporic embryo sac formation with diagrams.

Q35. What is Anemophily? Write the characteristics of anemophilous flowers.

Q36. What is Double fertilization?

Q37. Write and explain outbreeding devices.

Q38. Differentiate between nuclear and cellular endosperm.

Q39. State and explain the law of dominance with the help of a monohybrid cross.

Q40. State and explain Mendel's law of independent assortment with the help of a dihybrid cross.

Q41. Write the salient features of the chromosomal theory of inheritance.

Q42. Explain co-dominance with an example.

Q43. Write short notes on:

(a) Test cross

(b) Pleiotropy

(c) Multiple allelism

(d) Polygenic inheritance

Q44. Differentiate between DNA and RNA.

Q45. DNA is more stable genetic material as compared to RNA. Explain why.

Q46. Explain the semiconservative mode of DNA replication with the help of the Meselson and Stahl experiment.

Q47. Define genetic code and write its salient features.

Q48. How is replication different from translation?

Q49. Write the properties of genetic material.

Q50. Discuss gene expression? Explain lac-operon.

Q51. Write short notes on:

(a) Transcription Unit

(b) t-RNA

Q52. Explain the role of microbes in sewage treatment.

Q53. Define BOD.

Q54. Explain the role of microbes as biocontrol agents.

Q55. Write a short note on:

(a) Antibiotics

(b) Biofertilizers

Q56. Explain productivity. Differentiate between primary and secondary productivity.

Q57. Discuss ecological pyramids. Explain why the pyramid of energy is always upright.

Q58. Write short notes on:

(a) 10% law of energy transfer

(b) Food chain

Q59. What are the major reasons for biodiversity loss?

Q60. Explain the role of biodiversity in ecosystem stability.

Q61. Discuss in-situ conservation. Name some in-situ conservation strategies.

Q62. Discuss ex-situ conservation. Name some ex-situ conservation strategies.

Q63. Write a short note on Genetic diversity.

Q64. Write a short note on:

(a) Natality

(b) Mortality