Molecular Basis of Inheritance — BIOLOGY STD 12 Science — Question

Name the group of cells, the HIV enters after getting into a human body. What happens in these cells and what are these cells subsequently referred to as? Name the next group of cells, the HIV attacks from there.

Enlist the uses of gene therapy.

In view of the current food crisis, it is said, that we need another green revolution. Highlight the major limitations of the earlier green revolution.

Name the various green house gases? Give their percentage contribution to global warming.

Sketch and label simple grazing food chain

Explain the mechanism of sex determination in insects like Drosophila and grasshopper.

The process of transcription takes place on a part of DNA molecule known as transcription unit. Draw a well labelled diagram of the same showing different regions of the unit.

Write the function of each one of the following:
Oxytocin.

What would happen if our intestine harbours microbial flora exactly similar to that found in the rumen of cattle?

Viruses obtained by infecting bacteria having radioactive sulphur contained radioactive protein but not radioactive DNA.