List of top Questions asked in UP Board XII- 2025

What does ELISA stand for?
The exaggerated response of the immune system to certain antigens present in the environment is called
What are the finger-like projections on the edges of the infundibulum called?
Briefly describe the role of hormones in follicular and luteal phase of menstrual cycle in female primates.
Describe in detail energy flow in an ecosystem.
Give a brief account of different population growth models.
Write short notes on the following: (i) DNA Palindrome (ii) Carrying capacity
Briefly describe the mechanism of transcription in prokaryotes.
Exine layer of pollen grain is made up of
Which one of the following is not a stop terminator codon?
Describe the law of independent assortment in a dihybrid cross.
What are transgenic animals? Describe the benefits of transgenic animals in brief.
Describe the applications of r-DNA technology in medicine.
Write short note on primary and secondary lymphoid organs.
Write short notes on the following: (i) Vaccination (ii) Bio-fertilizer
What are cloning vectors? Write a short note on characteristics of cloning vectors.
Differentiate between innate immunity and acquired immunity giving suitable examples.
Describe the structure of a typical biogas plant with the help of a suitable diagram.
Write a note on enzymes used in DNA replication.
Describe the process and importance of artificial hybridization in brief.
Draw a well-labelled diagram of an antibody molecule.
What is age pyramid? Give a diagrammatic representation of the age pyramid of an expanding human population.
Comment upon Gause’s "competitive exclusion principle".
What are alleles?
Give a classical example of adaptive radiation.