List of top Biology Questions asked in UP Board XII

Define pollination. Briefly describe different kinds of pollination in flowering plants.
Define population. Discuss different attributes of population.
Give a detailed account of various strategies adopted for the conservation of biodiversity.
What is transcription? Briefly describe the mechanism of transcription in prokaryotes.
Explain the role of pedigree analysis in human genetics. Add a note on symbols used in pedigree analysis.
What is restriction endonuclease? Give any two examples.
Briefly describe the steps of production of human insulin using rDNA technology.
Write short notes on the following: (i) Filariasis (ii) Polyembryony
Describe the principle of immunization in brief. Add a note on passive immunization.
Define immunity. Differentiate between innate and acquired immunity with suitable examples.
Comment on tRNA.
With the help of two suitable examples, explain the vegetative propagation in plants.
Define sewage. Describe the biological treatment of sewage in brief.
Explain the type of pollination in cleistogamous flowers.
Comment upon the xerophytic adaptation in desert plants.
Define the term 'health'. Mention any two important factors to maintain good health.
Write the number of chromosomes in trisomic and monosomic conditions in humans.
Define allele. Comment upon multiple allelism with examples.
Briefly explain the inheritance of sex-linked recessive character in humans.
Briefly explain Gause's competitive exclusion principle.
What is hybridization? Describe the process and importance of artificial hybridization in brief.
Give any two causes of biodiversity loss.
Testosterone hormone is secreted by:
The phenotypic ratio of a Mendelian dihybrid cross is:
Define codominance.