List of top Biology Questions asked in UP Board XII

What is the function of Leydig cells?

Cocaine is obtained from which plant?

Unfertilized egg develops in which form of honeybee?

What is the unit of heredity?

Suitable vector for cloning in plant cells is:

Write notes on the following: ( Colourblindness.

The number of chromosomes found in maize is

Which of the following is a property of population?

Describe different population growth models in brief.

In Klinefelter syndrome, the number of sex chromosomes is:

Write an essay on biodiversity and its conservation.

Describe the structure of double helical DNA given by Watson and Crick with a diagram.

What are biofertilizers? State the role of microorganisms in their production.

What do you understand by Bt? Explain by giving an example of Bt-cotton.

What is megasporogenesis? Describe with a diagram the development of the female gametophyte in angiospermic plants.

Explain the reasons for ozone depletion in the stratosphere.

What are the effects of drug and alcohol abuse on the body?

Write notes on the following: ( Diagram of transverse section of female ovary.

How does elephantiasis (Filariasis) occur?

What do you understand by biopiracy?

Describe the structure of microsporangium with diagram.

What is placenta? Write its functions.

Why did Mendel choose pea plants for his experiments?

Explain the difference between exonuclease and endonuclease enzymes.

State the characteristics of genetic code.