List of top Questions asked in UP Board XII- 2026

What is a biodiversity hot-spot? Describe with an example.

Briefly explain the test cross.

What is colostrum? Write its importance.

Write a short note on birth control.

Write a short note on self-incompatibility.

Describe the mechanism of sex determination in honey bees and birds.

Describe the decomposition cycle in a terrestrial ecosystem with the help of a diagram.

What are transgenic plants? Describe benefits of transgenic plants in brief.

Briefly describe the structure and function of antibody molecule.

Describe the causes, detection and diagnosis of cancer in brief.

Discuss various measures for prevention and control of drug/ alcohol abuse.

Define spermatogenesis. Describe the process of spermatogenesis with the help of schematic diagram.

Explain the nomenclature of restriction endonucleases. Add a note on its applications.

Briefly describe the different methods used to transfer the recombinant DNA into the host cell.

What is trophic level? Comment upon the different types of trophic levels in an ecosystem.

Write a short note on over exploitation.

Explain test cross and back cross.

Comment upon the following: Infectious disease.

Comment upon the following: Amoebiasis.

What is Placenta? Describe different functions of placenta in brief.

Describe various factors responsible for explosive population growth in India.

What is adaptive radiation? Describe it with the help of a suitable example.

Name the gene which can exhibit multiple phenotypic expressions.

What do you mean by Mendelian disorders? Give two examples of sex-linked Mendelian disorder.

What is trichoderma? Give one application of trichoderma as an effective biocontrol agent.