JKBOSE 12th Class Biology Guess Paper Bi-Annual Private Exam 2026 | Download PDF
The JKBOSE 12th Class Biology Guess Paper 2026 for the Bi-Annual Private Examination has been prepared by selecting the most important and expected questions from the latest syllabus, previous year examinations, and high-weightage topics. This guess paper is specially designed to help students focus on the most important chapters and improve their performance in the upcoming board examination.
ZOOLOGY Portion Guess Paper
Q1. Draw a well labelled diagram of a T.S. of a Human Ovary.
Q2. Draw a well labelled diagram of a Human Testis.
Q3. What do you mean by infertility? Mention two causes and treatments.
Q4. What is Assisted Reproductive Technology (ART)? Give examples (IVF, GIFT, ZIFT).
Q5. What is contraception? Write the types and characteristics of ideal contraceptives.
Q6. Write short note on prevention of STDs (Sexually Transmitted Diseases).
Q7. What are birth control methods? Explain the need for birth control.
Q8. Define the term lactation and colostrum. Why is it important to feed the newborn babies in initial period of their growth.
Q9. Explain the concept of natural selection with an example.
Q10. Differentiate between:
a) Specific / Innate Immunity and Non-specific / Acquired Immunity
b) Active / Adaptive and Passive Immunity
c) Cell mediated and Humoral Immunity
Q11. Give brief account of lymphoid organs and their types.
Q12. Short note on:
a) Opioids
b) Cannabinoids
c) Coca alkaloids
d) Malignant Tumour
e) Drug abuse
Q13. What is menstrual cycle? Explain the ovarian and uterine changes during it.
Q14. Describe the hormonal control of menstrual cycle in females.
Q15. Write a short note on oxytocin hormone and its role during parturition.
Q16. What do you mean by Fetal Ejection Reflex?
Q17. Describe in brief hormonal control of menstrual cycle in females.
Q18. Give two differences between 1° and 2° oocyte.
Q19. Define reproductive health. Why is it important for a society?
Q20. What are the steps involved in DNA Fingerprinting?
Q21. Explain briefly Hardy-Weinberg equilibrium.
Q22. Define Immunity. Write a short note on Immunoglobulins.
Q23. What are Bio-safety issues?
Q24. Give an account of Gene-cloning.
Q25. Draw a structure of Sperm.
Q26. Draw a structure and function of placenta. Explain the role of the placenta in Human Pregnancy?
Q27. Draw a labelled diagram of microscopic anatomy of testis.
Q28. What is Klinefelter's syndrome? Give any four symptoms of this syndrome.
Q29. What is the causative agent of hepatitis? What are its symptoms?
Q30. Write a short note on Adolescence.
Q31. Write an account on stem cell technology.
Q32. Define Genome? Why Human Genome Project is called a Mega project? Write down its future implications?
Q33. Explain hardy-weinberg's principle? Add a note on Gene flow.
Q34. Describe the process of formation of a sperm from the primary Spermatocyte in human beings.
Q35. Draw a diagrammatic sketch of a sectional view of Human Female Reproductive System.
Q36. What are variations? Give their significance.
Q37. What is Dengue and what are its causes? Suggest some preventions against it.
Q38. Write down any two methods of introducing Recombinant DNA into a host cell.
Q39. What is Sex-Linked Inheritance? Describe the Pattern and Mechanism of inheritance of Haemophilia and colour blindness.
Q40. Describe the different stages of evolutionary development of Homo Sapiens.
Q41. Describe the Hormonal control of menstrual cycle in Human females.
Q42. Define Fertilization. Explain the events of Embryo development upto the Blastocyst formation.
Q43. What is DNA-Fingerprinting? Explain in brief the ‘Human Genome Project’ (HGP) and its significance.
Q44. How do chromosomal Disorders differ from Mendelian Disorders. Name any two chromosomal aberration associated disorders.
Q45. What is Amniocentesis? Write down its merits and demerits.
Q46. Define Spermatogenesis. Give a graphic representation of Spermatogenesis.
Q47. Describe briefly Turners Syndrome.
Q48. “Misuse of cannabinoids is harmful for health”. Comment.
Q49. Explain the technique of cloning. Give an examples.
Q50. What is Genome? Explain the technique of DNA Fingerprinting with its any two uses in modern day world.
Q51. What is Evolution? Discuss the Darwin's theory of Natural Selection to explain the mechanism of Biological evolution.
Q52. Write short note on Gene flow and Genetic drift.
Q53. Write a short note on Drug abuse.
Q54. How sexual diseases can be prevented?
Q55. Explain the need of Reproductive Health. Also add a note on medical termination of pregnancy.
Q56. Describe human male reproductive system with the help of diagram.
Q57. Write a short note on colour blindness in human beings.
Q58. Write down the applications of Gene therapy.
Q59. Explain the term ‘MTP’ in brief.
Q60. What do you mean by ‘DNA Fingerprinting’? Explain in brief ‘Human Genome Project’ and its significance.
Q61. Explain Hardy-Weinberg’s principle. Add a note on adaptive radiation.
Q62. Define immunity. Differentiate between innate and acquired immunity and explain antibodies (immunoglobulins).
Q63. Give the causative agent, symptoms and preventive measures of:
a) Typhoid
b) Filariasis or Elephantiasis
c) Malaria
d) AIDS
e) Ascariasis
f) Amoebiasis
g) Hepatitis
Q64. Describe Cancer as a major cause of death along with its causes and possible treatment.
BOTANY Portion Guess Paper
Q65. Briefly describe the development of male gametes from microspore in flowering plants.
Q66. What is Genetic code?
Q67. Define genetic code. What are its characteristics?
Q68. Define Ecological Pyramid. Name three types of ecological Pyramids.
Q69. What is tissue culture? Give its applications.
Q70. Write short notes on the following:
(a) Hot spots of Biodiversity
(b) Red Data Book
(c) Biosphere Reserves
Q71. What kinds of threats to the biodiversity may lead to its loss?
Q72. What are positive interactions in a biotic community? Give their kinds. Explain any one of these.
Q73. Write a short note on Pleiotropy.
Q74. What is BOD? What does it indicate when water sample has more BOD?
Q75. Define:
(a) Birth Rate
(b) Death Rate
Q76. Differentiate between Primary and Secondary Productivity.
Q77. What is a Biodiversity Hot Spot? Name hot spots located in India.
Q78. What is triple fusion? Where and how does it take place? Name the nuclei involved in triple fusion.
Q79. Briefly describe apomixis and polyembryony.
Q80. Differentiate between Dominance, Co-dominance and Incomplete dominance.
Q81. Define Replication Fork. Differentiate between Leading strand and Lagging strand.
Q82. Briefly discuss any three applications of tissue culture.
Q83. What are the major causes of Loss of Biodiversity? How can it be minimized?
Q84. Define decomposition. Describe the various stages of decomposition process in an ecosystem.
Q85. Define Parthenocarpy. Differentiate between vegetative and stimulative parthenocarpy.
Q86. What are GM organisms?
Q87. Differentiate between natality and mortality.
Q88. Define Pyramid of energy. Explain why pyramid of energy is always upright?
Q89. Name few outbreeding devices. Briefly describe any one of them.
Q90. How does a microspore develop into two male gametes in angiosperms? Describe the process with suitable diagrams.
Q91. Define Pleiotropic Gene. Give examples, one each from plants and animals.
Q92. Describe various applications of Plant Tissue Culture.
Q93. What is an Operon? Explain an Inducible Operon.
Q94. State the principle of Independent Assortment. Explain it with a dihybrid cross. Name one exception to this principle.
Q95. Describe the attributes that populations possess but not individuals.
Q96. 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?
Q97. Define Parthenocarpy. Differentiate between vegetative and stimulative parthenocarpy.
Q98. Male gametophyte formation with diagrams.
Q99. Monosporic embryo sac formation with diagrams.
Q100. Anemophily, characteristics of anemophilous flowers?
Q101. Double fertilization?
Q102. Write and explain outbreeding devices?
Q103. Difference between nuclear and cellular endosperm.
Q104. State and explain law of dominance with the help of monohybrid cross.
Q105. State and explain Mendel's law of independent assortment with the help of dihybrid cross.
Q106. Salient features of chromosomal theory of inheritance.
Q107. Explain co-dominance with example.
Q108. Write short notes on:
(a) Test cross
(b) Pleiotropy
(c) Multiple allelism
(d) Polygenic inheritance
Q109. Difference between DNA and RNA.
Q110. DNA is more stable genetic material as compared to RNA. Explain why?
Q111. Semiconservative mode of DNA replication? Explain with the help of Meselson and Stahl experiment.
Q112. Define genetic code and write its Salient features.
Q113. How replication is different from translation?
Q114. Properties of genetic material.
Q115. Discuss gene expression? Explain lac-operon?
Q116. Write short notes on:
(a) Transcription Unit
(b) t-RNA
Q117. Role of microbes in sewage treatment?
Q118. Define BOD?
Q119. Role of microbes as biocontrol agents?
Q120. Write short note on:
(a) Antibiotics
(b) Biofertilizers
Q121. Explain productivity? Difference between primary and secondary productivity.
Q122. Discuss ecological pyramids? Explain why pyramid of energy is always upright?
Q123. Write short notes on:
(a) 10% law of energy transfer
(b) Food chain
Q124. Major reasons of biodiversity loss?
Q125. Role of biodiversity in ecosystem stability?
Q126. Discuss in-situ conservation? Name some in-situ conservation strategies?
Q127. Discuss ex-situ conservation? Name some ex-situ conservation strategies?
Q128. Write short note on: (a) Genetic diversity
Q129. Short note on:
(a) Natality
(b) Mortality.
