List of top Questions asked in UP Board XII

Comment upon human insulin.

Write the number of chromosomes in trisomic and monosomic conditions in humans.

Write the name of the bacteria that converts milk into curd.

Who is the father of Green Revolution in India?

What type of nucleus is found in bacterial cell?

Name two nitrogen-fixing microorganisms.

Name the enzymes ( which cut the DNA at specific site and ( which join two DNA fragments.

What is a parthenocarpic fruit? Give one example.

What is transcription?

The endosperm of angiospermic plant is

In Mendel's monohybrid cross, the phenotypic ratio of long and dwarf pea is

The name of pathogen of typhoid is

Which one of the following characters does not belong to xerophytic plant?

Write two causes of biodiversity loss.

Describe in brief the exponential growth curve with the help of a suitable example.

Explain the formation of Embryo sac with the help of a diagram.

Trace the events that would take place in flowers from the time of fall of pollen grain on stigma up to completion of fertilization with the help of diagram.

Describe the Hershey-Chase experiment with labelled diagram. Write the conclusion drawn by the scientists after this experiment.

What is Biogas? How is it produced? Name the microbe involved in biogas production.

Write a brief note on the role of lymphoid organs in the immune response. Elaborate the different types of lymphoid organs in the human body with examples.

Describe the important enzymes required for genetic engineering.

What are the major causes of the loss of biodiversity?

What are cleistogamous flowers? Can cross-pollination occur in cleistogamous flowers? State the reasons.

What is biofertilizer? A farmer is advised to add a culture of which bacterium before sowing? How is this bacterium useful to the crop?

Define any two of the following: ( Commensalism ( Logistic growth ( Parasitism