List of top Questions asked in UP Board XII- 2025

Name the hormone synthesised and secreted by Leydig cells.
Write the names of different parts of a typical stamen.
Which of the following is an example of commensalism?
Describe lac-operon with diagram.
Mendel’s finding related to inheritance of characters were rediscovered by:
Write an essay on evidence for evolution of life on Earth.
Cells of which layer of microsporanguim are binucleate?
Ti plasmid vector is used to deliver gene of interest into which of the following hosts?
Describe the components of a water ecosystem in detail.
Write a note on cloning vectors.
Draw a labelled diagram of the sectional view of the mammary gland.
What is the Menstrual cycle? Describe its main steps.
What is Pollination? How many types of pollination are there? Describe with examples.
Give a short introduction of any two drugs.
Write a note on the effect of alcohol.
Write the complete form of G.M.O. Highlight its importance.
Write the importance of species diversity in an ecosystem.
Write two characteristics of genetic code.
Write the name of all types of RNA found in prokaryotes.
What is double fertilization? What is its importance?
Write the full form of A.R.T. What is its importance in human life?
Cannabinoids are obtained from which plant? Highlight its importance.
Write a note on Baker Yeast.
Write the name of any one sex-linked recessive disorder.
Write a short note on Humus.