Himachal Pradesh Board Class 12 Biology Exam Question Papers

[Rohit Barla]

Here I am looking for the previous year Biology question paper of Himachal Pradesh Board Class 12 Exam, can you please provide me the same???

As you are looking for the previous year Biology question paper of Himachal Pradesh Board Class 12 Exam, so here I am sharing the same with you

Section-A
Q1. Cllistogamous flower are
(a) Male flower which never opens
(b) female flower which never opens
(c) Bisexual flower which never opens
(d) Open bisexual flower which perform self pollination in bud condition.
(1)
Q2. An 'O' blood group child can not have parents of blood group
(a) B and B (b) A and B
(c) O and O (d) AB and O (1)
Q3. Single cell protein (SCP) represents
(a) Protein extracted from a micro-organism (b) Protein from a clone of cells
(c) Protein mass from single cell animal (d) Biomass from growth of a
micro-organism (1)
(26)
Q4. Addition of foregin gene in to a crop is
(a) Genitic Engineering (b) Biotechnology
(c) Tissue culture (d) Immunisation (1)
Q5. Pyramid of number deals with
(a) Species in an area (b) Individuals in a Community
(c) Individual in a trophic level (d) Sub species in a Community (1)

Section-B
Q6. What is Colostrum ? What are its main functions ?
OR
What are Leydig cells ? What is their function ? (1½)
Q7. How is a sickle cell carrier at an advantage over the rest of human population in
a malaria ridden area ? (1½)
Q8. What are transgenic bacteria ? Illustrate using one example.
OR
Explain principle and function of ELISA. (1½)
Q9. Briefly describe Predator food chain. (1½)
Q10. Define :
(a) Dominant trait. (b) Recessive trait (c) Homozygous
OR
Write one function of each.
(a) Promotor gene (b) t RNA (c) Exons (1½)
Q11. What is triple fussion ? What is its significance ? (1½)
Q12. Microbes can be used to decrease the use of chemical fertilizer and pesticides ?
Explain how this can be accomplished ? (1½)
Q13. Define the following terms :
(a) Biopatent (b) Biopiracy (c) Genitically modified food
(1½)
Q14. Outline salient features of Carbon Cycle in nature. (1½)
Q15. What is gene therapy ? (1½)
(27)

Section-C
Q16. What is aminocentesis ? What is its significance ? (2½)
Q17. What are Homologous organs ? Explain with examples. (2½)
Q18. What are biofertilzer, explain ? (2½)
Q19. Define : (a) Scavenging (b) Commensalism (c) Symbiosis
(d) Predation (e) Proto co-operation
OR
Write one example for each of the following :
(a) Heliophyte (b) Viviparous plant (c) Edothermic animals
(d) Ectothermic animals (e) Sciophyle (2½)
Q20. What is biotechnology ? How does old biotechnology differs from modern
biotechnology ? (2½)
Q21. Define Mendal's law of Independent assortment. Explain with suitable example.
OR
Write the application of Recombinant DNA technology. (2½)
Q22. Differentiate between spermatogensis and oogensis. (2½)
Q23. Describe hot spots of biodiversity with species reference to India. (2½)
Q24. Descibe an inducible operon with example and differentiate from repressible operon.
(3)
Q25. What do you understand by acid rain ? What are its effects on the vegitation ?
(3)

Section-D
Q26. What is Atavisim also write the name of atleast four vestigeal organ present in
human body.
OR
Describe Darwin Theory of 'Natural Selection'. (4)
Q27. (a) Write expanded forms of :
(1) AMIS (2) CMIS (3) NACO
(b) List any four danger signals of Cancer.
OR
(28)
(a) Name and explain briefly any three types of Cancer.
(b) Differentiate between antibodies and interferons. (3+2)
Q28. (a) Recapitulation theory was proposed by
(1) Van Bear (2) Darwin
(3) Haeckel (4) Aristotle
(b) Draw labelled L.S. of angiospermic ovule.
(c) What are Cry Protein ? Name the organism that produces them.
(1+2+2)