Science (English Medium) कक्षा १२ - CBSE Question Bank Solutions

Compare and contrast the advantages and disadvantages of the production of genetically modified crops.

What is gene therapy? Illustrate using the example of adenosine deaminase (ADA) deficiency.

Diagrammatically represent the experimental steps in cloning and expressing an human gene (say the gene for growth hormone) into a bacterium like E. coli?

Can you suggest a method to remove oil (hydrocarbon) from seeds based on your understanding of rDNA technology and the chemistry of oil?

Consult the internet and find out how to make orally active protein pharmaceuticals. What is the major problem to be encountered?

Give three hypotheses for explaining why tropics show greatest levels of species richness.

What is the significance of the slope of regression in a species-area relationship?

What initiatives were taken for reducing vehicular air pollution in Delhi? Has air quality improved in Delhi?

What role does an individual organism play as per Darwin's theory of natural selection?

Describe the structure of a nucleosome.

Mention the evolutionary significance of the Shrews

Mention the evolutionary significance of the Lobefins

Mention the evolutionary significance of the Homo habilis

Mention the evolutionary significance of the Homo erectus

Where in the fallopian tube does fertilization occur in humans?

Describe the development of a fertilized ovum upto implantation.

State the cause of ADA deficiency in humans.Mention a possible cure for an ADA deficiency patient.

How does restriction endonuclease function?

Expand the Given and mention one application of each:

ELISA

Although a prokaryotic cell has no defined nucleus, yet DNA is not scattered throughout the cell. Explain.