Bihar Board Class 12th Biology Guess Questions PDF

MAHATMAJI EDUCATOR Guess Question Pdf Class: 12th Bihar Board पर आधाररत सवाल Subject: Biology 17. Show diagrammatic representation of clover leaf Short Question...

MAHATMAJI EDUCATOR Guess Question Pdf Class: 12th Bihar Board पर आधाररत सवाल Subject: Biology 17. Show diagrammatic representation of clover leaf Short Question model of t-RNA molecule and name the four 1. What do you mean by Global Warming? Explain. arms. 2. Describe the types of bio diversity. 18. Distinguish between Homothallic and 3. Write an account of four benefits of transgenic Heterothallic conditions with the help of animals for human welfare. examples. 4. What is binary fission? Giving suitable example 19. Show the structure of human ovum with the help show it with the help of diagram. of well labelled diagram. 5. What are initiation codons? Name them. 20. Write a brief note on Down's syndrome. 6. What do you understand by tissue culture? 21. What do you understand by DNA finger printing? Illustrate its any two advantages. Explain it. 7. Draw the sketches of a zoospore and a conidium. 8. Mention the advantages of self-pollination. 9. What are communicable diseases in human beings? Describe with suitable examples. 10. Write about poultry farm management in brief. 11. Write expanded form of the followings :- A). GMO B). STD C). AMP D). VNTR 22. What do you understand by Palaeontology? Give 12. Distinguish between missing link and connecting the name of various eras. link. 23. Describe any four differences between B-DNA 13. Differentiate between the following :- and Z-DNA. A. Ovipary and Vivipary 24. Describe the steps involved in the process of B. Oestrus cycle & Menstrual cycle Recombinant DNA technology. 14. Write the scientific name of causal organism of 25. Show pond ecosystem with the help of diagram Malaria and Elephantiasis disease of human only. beings. 26. What is Gel electrophoresis? Mention any two 15. What do you understand by Noise pollution? applications of it. Describe its various sources. 27. Describe the causal organism, mode of 16. Mention any two applications of Gel- transmission, symptoms and therapy of Electrophoresis in biotechnology. Ringworm disease. 28. Define antigens and antibody. 42. Name any four genetic diseases. 29. Write the short notes on any two of the 43. Define the followings : followings :- A. Co-dominance A. National Park B. Incomplete Dominance B. Sanctuary B. Dominant C. Biosphere reserve D. Recessive D. Sacred groove 44. Define the operon and name its constituent genes. 30. Mention any four applications of Biotechnology 45. What do you understand by Gene pool ? in medicines and human health. 46. Explain the difference between divergent and 31. Write in brief on the followings with the help of convergent evolution. suitable examples. 47. What is pest resistant plant ? Give brief A. Biofertilizer description. B. Antibiotics 48. What do you understand by Food-chain? Name 32. Explain the various causes of water pollution in any two types of food-chains. brief. 49. Write the name of the causal organism of the 33. Name any two superior varieties, each of following diseases. sugarcane and cauliflower. A. Amoebiasis 34. Write short notes on any two of the followings in B. Malaria brief :- C. Ascariasis A. Vital index D. Pneumonia B. Reproductive potential 50. How do biofertilizer increase soil fertility? C. Population-Pathogen relationship 51. State the source and side-effects of Methane. D. Producer-Consumer relationship 52. Define stamens and pistil with the help of 35. Define any two of the followings: diagram. A. Trophic level 53. Name the scientific name of two sugar producing B. Ecological Pyramid plants. C. Tissue culture 54. What do you mean by Mendelian disorder ? D. Embryo culture Explain in brief with the help of suitable 36. Define Buds and Bulbils with the help of suitable example. examples. 55. What is the theory of recapitulation? 37. Explain Binary Fission and Multiple Fission with 56. Explain asexual reproduction in an organism with examples. the help of example. 38. How many types of restriction enzymes are there 57. Write a note on DNA polymerase. ? Write their names. 58. What do you understand by Ex-situ conservation 39. Define the following : ? A. Cloning site 59. What do you mean by Green-farming ? B. Microinjection 60. Show the well labelled diagram/sketch of 40. Write comments on practical adaptations in Anaphase stage of Mitotic cell division. animal. 61. What is cocaine ? From which plant it is 41. What do you understand by sterilization? Name obtained? any two methods. 62. What is oncogenesis? 63. Distinguish between continuous and 89. Name the primary and secondary lymphoid semicontinuous replication. organs. 64. What do you understand by biomagnifications ? 90. Name any four national park of India. 65. Define Species diversity. 91. What is the significance of vegetative 66. What is genetic drift? propagation? 67. What is DNA fingerprinting ? 92. What is Endosperm ? What are its types ? 68. Show the well labelled diagram/sketch of the T.S. 93. What are the roles of Sertoli cells and Leydig of testis. cells? 69. What is the importance of embryosac in 94. How IUDs (Intrauterine Contraceptive Devices) angiospermic plants? prevent pregnancy? 70. What is Gel electrophoresis? 95. What is Codominance ? Explain with the help of 71. Show the structure of plasmid pBR322. example, briefly. 72. Explain tubectomy with the help of 96. What is Chromosomal theory of inheritance ? diagram/sketch. 97. Write a brief note on Haemophilia. 73. Define hydrophytic plants with the help of 98. Explain the structure of Nucleosome. suitable example. 99. What is founder effect? 74. Differentiate between Food chain and Food-web. 100. Write down the name of infective form of 75. Define chromosomal aberration. Plasmodium and name of its vector and the toxic 76. Describe spermatogenesis in brief. substance released after rupture of RBCs. 77. Show the well labelled diagram of an 101. What is Metastasis ? angiospermic 8-nucleate embryo-sac. 102. Define explants and totipotency. 78. Write in brief on natural selection. 103. Write a brief note on Mycorrhiza. 79. Define ecological diversity. 104. Why is restriction endonuclease called as 80. Write a note on RNA polymerase enzyme. 'molecular scissors'? Explain. 81. Distinguish between B-DNA and Z-DNA. 105. What are advantages of GM-crops 82. Define cross-pollination with the help of suitable (Genetically Modified Crops)? example. 106. What is the name of genes and proteins which 83. Differentiate between external and internal control cotton ballworm? fertilization. 107. Define diapause and hibernation. 84. What do you mean by selectable marker ? 108. Write a brief note on decomposition. 85. Name the causal organism of the following 109. What is an endemic species ? diseases. 110. What is Polyblend? Who developed it? (A) Tuberculosis 111. What is DNA probe ? Explain its usefulness (B) Filaria in biotechnology. (C) AIDS 112. Write comments on adaptations of desert (D) Ring worm plants and animals. 86. What do you understand by parthenogenesis? 113. Explain Food-web with example. Explain with example. 114. Write the names of any four sexually 87. What do you understand by Pedigree analysis ? transmitted diseases. How is it useful? 115. Explain about DNA ligase and Chitinase. 88. Describe about the hazards of transgenic animals. 116. What do you understand by pollination ? 140. Write a note on organic farming. Write the names of the pollination methods. 141. Define genetic diversity. 117. Explain budding with examples. 142. Define mutation. 118. Differentiate between Karyogamy and 143. What is the role of termination codon in Karyokinesis. protein synthesis? 119. What do you understand by phenotype and 144. Show the well labelled diagram/sketch of genotype? Give an example of each. Telophase stage of mitotic cell division. 120. Write a note on functioning of Lac-operon. 145. What do you understand by Parthenogenesis? 121. What do you understand by DNA 146. Distinguish between true fruit and false fruit. polymorphism – 147. Name any two restriction enzymes. 122. Make a list of human vestigial organs. 148. Define megasporogenesis. 123. Write the names of any three parts of 149. Differentiate between Exonuclease and biodiversity. Endonuclease. 124. What do you understand by Recapitulation 150. What do you mean by sequential evolution ? theory? Define. 125. Write the names of four national parks of 151. Name any two biofertilizers. India. 152. Write a note on organic farming. 126. Name the bacterium which produces B.T. 153. What do you understand by point mutation ? toxin-f 154. Show the well-labelled diagram of Telophase 127. Why are bacteria and fungi called stage of Mitotic cell division. decomposers ? 155. What do you mean by loss of biodiversity ? 128. Explain biological nitrogen fixation. 156. Describe about tuberculosis disease. 129. Define Eutrophication and Algal blooms. 157. Differentiate between somatic hybrid and 130. What do you mean by ovulation ? Explain. somaclone. 131. Distinguish between smoke and hydrocarbon. 158. Define test cross and reciprocal cross. 132. Define sequential evolution. 159. What do you mean by double fertilization? 133. Explain sexual reproduction in an organism Who discovered it? with the help of example. 160. Explain about protoplast culture. 134. What do you understand by in-situ 161. Describe the homologous and analogous conservation? organs with the help of suitable examples. 135. Name any two biofertilizers. 162. Write a note on global warming. 136. Show the well-labelled diagram/sketch of 163. Define xerosere and hydrosere. human oocyte. 164. What are the advantages of using 137. Mention scientific name of pathogens of the biofertilizers in agriculture? Explain. following diseases : 165. Define genetic engineering. (i) Typhoid (ii): Tuberculosis Long Question (iii) Amoebiasis 1. What do you understand by bio-fertilizer? (iv) Tetanus. What are the benefits soil gets from them? 138. What is primary response? Name any two such bio-fertilizers. 139. Differentiate between codon and anticodon. 2. Show food-chain in a fresh water pond and B. Draw well-labelled diagram of T.S. of illustrate with the help of diagram. human Testes. 3. What do you understand by mutation? What 13. Describe any two of the followings :- are their main types and mention its A. Benefits of micropropagation significance in brief. B. Sound Pollution 4. What do you mean by Cry-protein? It is C. Conservation of biodiversity. obtained from which organism? Describe its 14. What do you understand by operon concept ? various uses. Explain the Lacoperon with the help of 5. What do you mean by foetal membrane? diagram. Mention its types and explain it in brief. 15. Answer the following questions :- 6. Write short notes on any two of the A. What do you understand by integrated pest following: management? A. Fisheries B. What is poultry? Write its benefits. B. Ribosome C. What do you understand by C. Infertility micropropagation? Write its benefits. D. Red data book. 16. Differentiate the following : 7. What do you understand by Chromosomal A. Antibiotic and interferon. aberrations? B. Biofertilizer and Biogas. 8. Explain the followings - 17. Describe any two of the following :- A. Deletion A. Crossing over B. Duplication B. Meselson and Stahl's experiment C. Inversion C. Processing of tRNA 9. Answer the following questions :- D. Lysogenic cycle of Bacteriophage A. Give the name of Initiation codon and 18. Show any two with the help of labelled Termination codon. diagram/sketch only. B. What do you understand by Transcription A. Binary fission in Bacterial cell. ? B. Metaphase stage of mitotic cell division. C. What is the role of Ribosome in protein C. Structure of ovule of an Angiospermic synthesis? plant. 10. Distinguish between the followings :- 19. Define the followings :- A. Insect pollination and Ornithophily. A. Genome B. Lamarckism and Darwinism B. Multiple allelism 11. Describe any two of the followings :- C. Lethal gene A. AIDS D. Chromosomal aberrations B. Radiation Pollution E. Colour blindness C. Double fertilization 20. Answer the following questions: 12. Show the following with the help of diagram (A) Describe the morphological changes that only. occurred during the course of evolution of A. Draw well-labelled diagram of T.S. of Man. human ovary showing various follicles. (B) Write a note on Homo sapiens 21. What is transgenic plant? Write a note on Bt 34. Write a brief notes on - cotton. (A) Plasmid as vector 22. Describe the following :- (B) Transgenic Cow – Rosie (A) Products of biotechnology 35. Describe Immune System of Body. (B) Gene therapy 36. What is Operon model ? Describe Lac 23. Write short notes on the following: Operon. (A) Radioactive materials 37. Write a brief notes on the following (B) Blastocyst formation (A) Amniocentesis 24. Answer the following questions: (B) Development of male gametophyte in A. What are the functions of lymphocytes in angiospermic plants. immunity? 38. Draw a well labelled diagram of B. Write about the symptoms, pathogen and monocotyledonous seed. control of cholera disease. 39. Draw well labelled diagram of Bio-reactor. 25. Distinguish between the following : 40. Explain the case of co-dominance with (A) Parthenogenesis and Apomixis suitable examples. (B) Callus culture and embryo culture 41. What is Test-cross ? Mention its significance. 26. What do you mean by methanogens ? How 42. Define pathogens. Mention their types. do methanogens help in producing biogas ? 43. Which is Mutation breeding ? Name any two 27. Describe the following :- varieties of any crop which have been (A) Importance of plants in pollution control developed by this method. (B) Dairy farm management. 44. What are ex-plants ? Mention their role. 28. What do you understand by Biopesticide ? 45. What are antibiotics ? Name sources of any Write a note on BTtoxin. two of them. 29. Answer the following questions : 46. Explain the significance of PCR. (A) Distinguish between Down's syndrome 47. What is predation? Mention its role in and Klinefelter's syndrome. terrestrial ecosystem. (B) Distinguish between the gametogenesis 48. Comment upon Turner's syndrome in brief. and embryogenesis. 49. Mention the significance of Detrivores in an 30. Describe sex-linked inheritance with the help ecosystem. of suitable examples. 50. What are termination codons? Write their 31. Write short notes on the following :- names. (A) Ovulation 51. What are transgenic organisms ? Explain (B) Hydrosere their significance. 32. Define Greenhouse effect. Name Greenhouse 52. Explain Pleotropism with suitable examples. gases and write a brief note on Global 53. Explain the use of micro-injection. Warming. 54. Explain palindromic sequence in brief. 33. Answer the following questions : 55. What is Immunity? Mention its types. (A) What is energy flow ? 56. What do you mean by double fertilization ? (B) What is Ori ? Describe its significance. 57. Describe the evolution of organisms in brief. 58. Define Bio-technology. Describe its role in culture the field of medicine. (b) Somatic hybrid and somaclone. 59. What do you mean by Animal husbandary ? 73. Write short notes on the following : Explain its role in organic farming. (a) Microbes as biofertilizers 60. Depict the water-cycle in nature with well- (b) Placenta formation and foetus nutrition. labelled diagrams. 74. Write short notes on placenta formation and foetus nutrition. 61. Describe 𝑡-RNA with suitable well-labelled 75. Describe the following : diagram. (a) Genetically modified organisms 62. What do you understand by central dogma? (b) Tools of genetic engineering. Describe transcription in detail. 76. Answer the following questions: 63. Answer the following questions : (a) Distinguish between somatic (a) Define vaccine and immunization. embryogenesis and embryo culture. (b) Write the names of any three groups of (b) Write a note on adaptive radiation. antibodies. 77. Describe the structure of an ecosystem. 64. Differentiate between the following : 78. What do you understand by genetic code ? (a) Inbreeding and cross-breeding. Describe the properties of genetic code. (b) Protoplast culture and tissue culture. 79. Write short notes on the following : 65. Describe any two of the following : (a) Conservation of endangered species (a) Infectious diseases and transmission- (b) Types of biodiversity. (b) Homology and Homologous organs - (c) Filariasis (d) T-lymphocytes and B-lymphocytes. 66. Show the following with the help of labelled diagram only : (a) Structure of AIDS virus (b) Clover leaf model of 𝑡-RNA (c) Human sperm. 67. Define the following : (a) Biotic components (of an ecosystem) (b) Greenhouse effect (c) Population growth (d) Emasculation - (c) Biofertilizer 68. Answer the following questions: (a) What do you understand by recombination ? How are the recombinants formed ? (b) Write a note on gene migration. 69. Give an account of industrial applications of biotechnology. 70. Describe the following. (a) Tools of Genetic Engineering (b) Genetically modified organisms. 71. Describe the sources, effects and control of pollution due to radiation in detail. 72. Differentiate between the following : (a) Somatic embryogenesis and embryo