List of top Biology Questions

Write the number of chromosomes in trisomic and monosomic conditions in humans.
The name of pathogen of typhoid is
Write two causes of biodiversity loss.
Which one of the following characters does not belong to xerophytic plant?
In Mendel's monohybrid cross, the phenotypic ratio of long and dwarf pea is
The endosperm of angiospermic plant is
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.
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.
Explain the formation of Embryo sac with the help of a diagram.
Describe the Hershey-Chase experiment with labelled diagram. Write the conclusion drawn by the scientists after this experiment.
Describe in brief the exponential growth curve with the help of a suitable example.
What are cleistogamous flowers? Can cross-pollination occur in cleistogamous flowers? State the reasons.
What are the major causes of the loss of biodiversity?
Define any two of the following: ( Commensalism ( Logistic growth ( Parasitism
Write the important goals of Human Genome Project (HGP).
What is gene therapy? Illustrate this using the example of adenosine deaminase (AD deficiency.
What is biofertilizer? A farmer is advised to add a culture of which bacterium before sowing? How is this bacterium useful to the crop?
Describe mutualism with the help of the wasp-fig relationship.
Describe the important enzymes required for genetic engineering.
How does the production of insulin take place in genetically modified organisms?
Describe the structure of human sperm with a well-labelled diagram.
Write the difference between DNA and RNA.
What do you mean by metastasis?
Draw a well-labelled diagram of DNA double helix model.